/usr/share/php/PHP/Depend/Parser.php is in pdepend 1.1.4-1.
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6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 | <?php
/**
* This file is part of PHP_Depend.
*
* PHP Version 5
*
* Copyright (c) 2008-2012, Manuel Pichler <mapi@pdepend.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Manuel Pichler nor the names of his
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @category QualityAssurance
* @package PHP_Depend
* @author Manuel Pichler <mapi@pdepend.org>
* @copyright 2008-2012 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id$
* @link http://pdepend.org/
*/
/**
* The php source parser.
*
* With the default settings the parser includes annotations, better known as
* doc comment tags, in the generated result. This means it extracts the type
* information of @var tags for properties, and types in @return + @throws tags
* of functions and methods. The current implementation tries to ignore all
* scalar types from <b>boolean</b> to <b>void</b>. You should disable this
* feature for project that have more or less invalid doc comments, because it
* could produce invalid results.
*
* <code>
* $parser->setIgnoreAnnotations();
* </code>
*
* <b>Note</b>: Due to the fact that it is possible to use the same name for
* multiple classes and interfaces, and there is no way to determine to which
* package it belongs, while the parser handles class, interface or method
* signatures, the parser could/will create a code tree that doesn't reflect the
* real source structure.
*
* @category QualityAssurance
* @package PHP_Depend
* @author Manuel Pichler <mapi@pdepend.org>
* @copyright 2008-2012 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: 1.1.4
* @link http://pdepend.org/
* @todo Rename class from "Parser" to "AbstractParser"
*/
abstract class PHP_Depend_Parser implements PHP_Depend_ConstantsI
{
/**
* Regular expression for inline type definitions in regular comments. This
* kind of type is supported by IDEs like Netbeans or eclipse.
*/
const REGEXP_INLINE_TYPE = '(^\s*/\*\s*
@var\s+
\$[a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff]*\s+
(.*?)
\s*\*/\s*$)ix';
/**
* Regular expression for types defined in <b>throws</b> annotations of
* method or function doc comments.
*/
const REGEXP_THROWS_TYPE = '(\*\s*
@throws\s+
([a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff\\\\]*)
)ix';
/**
* Regular expression for types defined in annotations like <b>return</b> or
* <b>var</b> in doc comments of functions and methods.
*/
const REGEXP_RETURN_TYPE = '(\*\s*
@return\s+
(array\(\s*
(\w+\s*=>\s*)?
([a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff\|\\\\]*)\s*
\)
|
([a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff\|\\\\]*))\s+
)ix';
/**
* Regular expression for types defined in annotations like <b>return</b> or
* <b>var</b> in doc comments of functions and methods.
*/
const REGEXP_VAR_TYPE = '(\*\s*
@var\s+
(array\(\s*
(\w+\s*=>\s*)?
([a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff\|\\\\]*)\s*
\)
|
([a-zA-Z_\x7f-\xff\\\\][a-zA-Z0-9_\x7f-\xff\|\\\\]*))\s+
|
(array)\(\s*\)\s+
)ix';
/**
* Internal state flag, that will be set to <b>true</b> when the parser has
* prefixed a qualified name with the actual namespace.
*
* @var boolean
*/
private $namespacePrefixReplaced = false;
/**
* The name of the last detected namespace.
*
* @var string
*/
private $namespaceName;
/**
* Last parsed package tag.
*
* @var string
*/
private $packageName = self::DEFAULT_PACKAGE;
/**
* The package defined in the file level comment.
*
* @var string
*/
private $globalPackageName = self::DEFAULT_PACKAGE;
/**
* The used data structure builder.
*
* @var PHP_Depend_BuilderI
*/
protected $builder;
/**
* The currently parsed file instance.
*
* @var PHP_Depend_Code_File
*/
private $sourceFile;
/**
* The symbol table used to handle PHP 5.3 use statements.
*
* @var PHP_Depend_Parser_SymbolTable
*/
private $useSymbolTable;
/**
* The last parsed doc comment or <b>null</b>.
*
* @var string
*/
private $docComment;
/**
* Bitfield of last parsed modifiers.
*
* @var integer
*/
private $modifiers = 0;
/**
* The actually parsed class or interface instance.
*
* @var PHP_Depend_Code_AbstractClassOrInterface
*/
private $classOrInterface;
/**
* If this property is set to <b>true</b> the parser will ignore all doc
* comment annotations.
*
* @var boolean
*/
private $ignoreAnnotations = false;
/**
* Stack with all active token scopes.
*
* @var PHP_Depend_Parser_TokenStack
*/
private $tokenStack;
/**
* Used identifier builder instance.
*
* @var PHP_Depend_Util_UuidBuilder
* @since 0.9.12
*/
private $uuidBuilder = null;
/**
* The maximum valid nesting level allowed.
*
* @var integer
* @since 0.9.12
*/
private $maxNestingLevel = 1024;
/**
*
* @var PHP_Depend_Util_Cache_Driver
* @since 0.10.0
*/
protected $cache;
/*
* The used code tokenizer.
*
* @var PHP_Depend_TokenizerI
*/
protected $tokenizer;
/**
* Constructs a new source parser.
*
* @param PHP_Depend_TokenizerI $tokenizer The used code tokenizer.
* @param PHP_Depend_BuilderI $builder The used node builder.
* @param PHP_Depend_Util_Cache_Driver $cache The used parser cache.
*/
public function __construct(
PHP_Depend_TokenizerI $tokenizer,
PHP_Depend_BuilderI $builder,
PHP_Depend_Util_Cache_Driver $cache
) {
$this->tokenizer = $tokenizer;
$this->builder = $builder;
$this->cache = $cache;
$this->uuidBuilder = new PHP_Depend_Util_UuidBuilder();
$this->tokenStack = new PHP_Depend_Parser_TokenStack();
$this->useSymbolTable = new PHP_Depend_Parser_SymbolTable();
$this->builder->setCache($this->cache);
}
/**
* Sets the ignore annotations flag. This means that the parser will ignore
* doc comment annotations.
*
* @return void
*/
public function setIgnoreAnnotations()
{
$this->ignoreAnnotations = true;
}
/**
* Configures the maximum allowed nesting level.
*
* @param integer $maxNestingLevel The maximum allowed nesting level.
*
* @return void
* @since 0.9.12
*/
public function setMaxNestingLevel($maxNestingLevel)
{
$this->maxNestingLevel = $maxNestingLevel;
}
/**
* Returns the maximum allowed nesting/recursion level.
*
* @return integer
* @since 0.9.12
*/
protected function getMaxNestingLevel()
{
return $this->maxNestingLevel;
}
/**
* Parses the contents of the tokenizer and generates a node tree based on
* the found tokens.
*
* @return void
*/
public function parse()
{
$this->sourceFile = $this->tokenizer->getSourceFile();
$this->sourceFile
->setCache($this->cache)
->setUuid($this->uuidBuilder->forFile($this->sourceFile));
$hash = md5_file($this->sourceFile->getFileName());
if ($this->cache->restore($this->sourceFile->getUuid(), $hash)) {
return;
}
$this->cache->remove($this->sourceFile->getUuid());
$this->setUpEnvironment();
$this->tokenStack->push();
PHP_Depend_Util_Log::debug('Processing file ' . $this->sourceFile);
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
switch ($tokenType) {
case self::T_COMMENT:
$this->consumeToken(self::T_COMMENT);
break;
case self::T_DOC_COMMENT:
$comment = $this->consumeToken(self::T_DOC_COMMENT)->image;
$this->packageName = $this->parsePackageAnnotation($comment);
$this->docComment = $comment;
break;
case self::T_USE:
// Parse a use statement. This method has no return value but it
// creates a new entry in the symbol map.
$this->parseUseDeclarations();
break;
case self::T_NAMESPACE:
$this->parseNamespaceDeclaration();
break;
case self::T_NO_PHP:
case self::T_OPEN_TAG:
case self::T_OPEN_TAG_WITH_ECHO:
$this->consumeToken($tokenType);
$this->reset();
break;
case self::T_CLOSE_TAG:
$this->parseNonePhpCode();
$this->reset();
break;
default:
if (null === $this->parseOptionalStatement()) {
// Consume whatever token
$this->consumeToken($tokenType);
}
break;
}
$tokenType = $this->tokenizer->peek();
}
$this->sourceFile->setTokens($this->tokenStack->pop());
$this->cache->store(
$this->sourceFile->getUuid(),
$this->sourceFile,
$hash
);
$this->tearDownEnvironment();
}
/**
* Initializes the parser environment.
*
* @return void
* @since 0.9.12
*/
protected function setUpEnvironment()
{
ini_set('xdebug.max_nesting_level', $this->getMaxNestingLevel());
$this->useSymbolTable->createScope();
$this->reset();
}
/**
* Restores the parser environment back.
*
* @return void
* @since 0.9.12
*/
protected function tearDownEnvironment()
{
ini_restore('xdebug.max_nesting_level');
$this->useSymbolTable->destroyScope();
}
/**
* Resets some object properties.
*
* @param integer $modifiers Optional default modifiers.
*
* @return void
*/
protected function reset($modifiers = 0)
{
$this->packageName = self::DEFAULT_PACKAGE;
$this->docComment = null;
$this->modifiers = $modifiers;
}
/**
* Tests if the given token type is a reserved keyword in the supported PHP
* version.
*
* @param $tokenType
* @return boolean
* @since 1.1.1
*/
abstract protected function isKeyword($tokenType);
/**
* Will return <b>true</b> if the given <b>$tokenType</b> is a valid class
* name part.
*
* @param integer $tokenType The type of a parsed token.
* @return boolean
* @since 0.10.6
*/
protected abstract function isClassName($tokenType);
/**
* Parses a valid class or interface name for the currently configured php
* version.
*
* @return string
* @since 0.9.20
*/
protected abstract function parseClassName();
/**
* Parses a valid method or function name for the currently configured php
* version.
*
* @return string
* @since 0.10.0
*/
protected abstract function parseFunctionName();
/**
* Parses a trait declaration.
*
* @return PHP_Depend_Code_Trait
* @since 1.0.0
*/
private function parseTraitDeclaration()
{
$this->tokenStack->push();
$trait = $this->parseTraitSignature();
$trait = $this->parseTypeBody($trait);
$trait->setTokens($this->tokenStack->pop());
$this->reset();
return $trait;
}
/**
* Parses the signature of a trait.
*
* @return PHP_Depend_Code_Trait
*/
private function parseTraitSignature()
{
$this->consumeToken(self::T_TRAIT);
$this->consumeComments();
$qualifiedName = $this->createQualifiedTypeName($this->parseClassName());
$trait = $this->builder->buildTrait($qualifiedName);
$trait->setSourceFile($this->sourceFile);
$trait->setDocComment($this->docComment);
$trait->setUuid($this->uuidBuilder->forClassOrInterface($trait));
$trait->setUserDefined();
return $trait;
}
/**
* Parses the dependencies in a interface signature.
*
* @return PHP_Depend_Code_Interface
*/
private function parseInterfaceDeclaration()
{
$this->tokenStack->push();
$interface = $this->parseInterfaceSignature();
$interface = $this->parseTypeBody($interface);
$interface->setTokens($this->tokenStack->pop());
$this->reset();
return $interface;
}
/**
* Parses the signature of an interface and finally returns a configured
* interface instance.
*
* @return PHP_Depend_Code_Interface
* @since 0.10.2
*/
private function parseInterfaceSignature()
{
$this->consumeToken(self::T_INTERFACE);
$this->consumeComments();
$qualifiedName = $this->createQualifiedTypeName($this->parseClassName());
$interface = $this->builder->buildInterface($qualifiedName);
$interface->setSourceFile($this->sourceFile);
$interface->setDocComment($this->docComment);
$interface->setUuid($this->uuidBuilder->forClassOrInterface($interface));
$interface->setUserDefined();
return $this->parseOptionalExtendsList($interface);
}
/**
* Parses an optional interface list of an interface declaration.
*
* @param PHP_Depend_Code_Interface $interface The declaring interface.
*
* @return PHP_Depend_Code_Interface
* @since 0.10.2
*/
private function parseOptionalExtendsList(PHP_Depend_Code_Interface $interface)
{
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_EXTENDS) {
$this->consumeToken(self::T_EXTENDS);
$this->parseInterfaceList($interface);
}
return $interface;
}
/**
* Parses the dependencies in a class signature.
*
* @return PHP_Depend_Code_Class
*/
private function parseClassDeclaration()
{
$this->tokenStack->push();
$class = $this->parseClassSignature();
$class = $this->parseTypeBody($class);
$class->setTokens($this->tokenStack->pop());
$this->reset();
return $class;
}
/**
* Parses the signature of a class.
*
* The signature of a class consists of optional class modifiers like, final
* or abstract, the T_CLASS token, the class name, an optional parent class
* and an optional list of implemented interfaces.
*
* @return PHP_Depend_Code_Class
* @since 1.0.0
*/
private function parseClassSignature()
{
$this->parseClassModifiers();
$this->consumeToken(self::T_CLASS);
$this->consumeComments();
$qualifiedName = $this->createQualifiedTypeName($this->parseClassName());
$class = $this->builder->buildClass($qualifiedName);
$class->setSourceFile($this->sourceFile);
$class->setModifiers($this->modifiers);
$class->setDocComment($this->docComment);
$class->setUuid($this->uuidBuilder->forClassOrInterface($class));
$class->setUserDefined();
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_EXTENDS) {
$class = $this->parseClassExtends($class);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
}
if ($tokenType === self::T_IMPLEMENTS) {
$this->consumeToken(self::T_IMPLEMENTS);
$this->parseInterfaceList($class);
}
return $class;
}
/**
* This method parses an optional class modifier. Valid class modifiers are
* <b>final</b> or <b>abstract</b>.
*
* @return void
*/
private function parseClassModifiers()
{
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_ABSTRACT) {
$this->consumeToken(self::T_ABSTRACT);
$this->modifiers |= self::IS_EXPLICIT_ABSTRACT;
} else if ($tokenType === self::T_FINAL) {
$this->consumeToken(self::T_FINAL);
$this->modifiers |= self::IS_FINAL;
}
$this->consumeComments();
}
/**
* Parses a parent class declaration for the given <b>$class</b>.
*
* @param PHP_Depend_Code_Class $class The context class instance.
*
* @return PHP_Depend_Code_Class
* @since 1.0.0
*/
private function parseClassExtends(PHP_Depend_Code_Class $class)
{
$this->consumeToken(self::T_EXTENDS);
$this->tokenStack->push();
$class->setParentClassReference(
$this->setNodePositionsAndReturn(
$this->builder->buildAstClassReference(
$this->parseQualifiedName()
)
)
);
return $class;
}
/**
* This method parses a list of interface names as used in the <b>extends</b>
* part of a interface declaration or in the <b>implements</b> part of a
* class declaration.
*
* @param PHP_Depend_Code_AbstractClassOrInterface $abstractType The declaring
* type instance.
*
* @return void
*/
private function parseInterfaceList(
PHP_Depend_Code_AbstractClassOrInterface $abstractType
) {
while (true) {
$this->tokenStack->push();
$abstractType->addInterfaceReference(
$this->setNodePositionsAndReturn(
$this->builder->buildAstClassOrInterfaceReference(
$this->parseQualifiedName()
)
)
);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_CURLY_BRACE_OPEN) {
break;
}
$this->consumeToken(self::T_COMMA);
}
}
/**
* Parses a class/interface/trait body.
*
* @param PHP_Depend_Code_AbstractType $type Context class, trait or interface
* @return PHP_Depend_Code_AbstractType
*/
private function parseTypeBody(PHP_Depend_Code_AbstractType $type)
{
$this->classOrInterface = $type;
// Consume comments and read opening curly brace
$this->consumeComments();
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
$defaultModifier = self::IS_PUBLIC;
if ($type instanceof PHP_Depend_Code_Interface) {
$defaultModifier |= self::IS_ABSTRACT;
}
$this->reset();
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
switch ($tokenType) {
case self::T_ABSTRACT:
case self::T_PUBLIC:
case self::T_PRIVATE:
case self::T_PROTECTED:
case self::T_STATIC:
case self::T_FINAL:
case self::T_FUNCTION:
case self::T_VARIABLE:
case self::T_VAR:
$methodOrProperty = $this->parseMethodOrFieldDeclaration(
$defaultModifier
);
if ($methodOrProperty instanceof PHP_Depend_Code_ASTNode) {
$type->addChild($methodOrProperty);
}
$this->reset();
break;
case self::T_CONST:
$type->addChild($this->parseConstantDefinition());
$this->reset();
break;
case self::T_CURLY_BRACE_CLOSE:
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
$this->reset();
// Reset context class or interface instance
$this->classOrInterface = null;
// Stop processing
return $type;
case self::T_COMMENT:
$token = $this->consumeToken(self::T_COMMENT);
$comment = $this->builder->buildAstComment($token->image);
$comment->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
$type->addChild($comment);
break;
case self::T_DOC_COMMENT:
$token = $this->consumeToken(self::T_DOC_COMMENT);
$comment = $this->builder->buildAstComment($token->image);
$comment->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
$type->addChild($comment);
$this->docComment = $token->image;
break;
case self::T_USE:
$type->addChild($this->parseTraitUseStatement());
break;
default:
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->tokenizer->getSourceFile()
);
}
$tokenType = $this->tokenizer->peek();
}
throw new PHP_Depend_Parser_TokenStreamEndException($this->tokenizer);
}
/**
* This method will parse a list of modifiers and a following property or
* method.
*
* @param integer $modifiers Optional default modifiers for the property
* or method node that will be parsed.
*
* @return PHP_Depend_Code_Method|PHP_Depend_Code_ASTFieldDeclaration
* @since 0.9.6
*/
private function parseMethodOrFieldDeclaration($modifiers = 0)
{
$this->tokenStack->push();
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
switch ($tokenType) {
case self::T_PRIVATE:
$modifiers |= self::IS_PRIVATE;
$modifiers = $modifiers & ~self::IS_PUBLIC;
break;
case self::T_PROTECTED:
$modifiers |= self::IS_PROTECTED;
$modifiers = $modifiers & ~self::IS_PUBLIC;
break;
case self::T_VAR:
case self::T_PUBLIC:
$modifiers |= self::IS_PUBLIC;
break;
case self::T_STATIC:
$modifiers |= self::IS_STATIC;
break;
case self::T_ABSTRACT:
$modifiers |= self::IS_ABSTRACT;
break;
case self::T_FINAL:
$modifiers |= self::IS_FINAL;
break;
case self::T_FUNCTION:
$method = $this->parseMethodDeclaration();
$method->setModifiers($modifiers);
$method->setSourceFile($this->sourceFile);
$method->setUuid($this->uuidBuilder->forMethod($method));
$method->setTokens($this->tokenStack->pop());
return $method;
case self::T_VARIABLE:
$declaration = $this->parseFieldDeclaration();
$declaration->setModifiers($modifiers);
return $declaration;
default:
break 2;
}
$this->consumeToken($tokenType);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
}
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->tokenizer->getSourceFile()
);
}
/**
* This method will parse a class field declaration with all it's variables.
*
* <code>
* // Simple field declaration
* class Foo {
* protected $foo;
* }
*
* // Field declaration with multiple properties
* class Foo {
* protected $foo = 23
* $bar = 42,
* $baz = null;
* }
* </code>
*
* @return PHP_Depend_Code_ASTFieldDeclaration
* @since 0.9.6
*/
private function parseFieldDeclaration()
{
$declaration = $this->builder->buildAstFieldDeclaration();
$declaration->setComment($this->docComment);
$type = $this->parseFieldDeclarationType();
if ($type !== null) {
$declaration->addChild($type);
}
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
$declaration->addChild($this->parseVariableDeclarator());
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType !== self::T_COMMA) {
break;
}
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
}
$this->setNodePositionsAndReturn($declaration);
$this->consumeToken(self::T_SEMICOLON);
return $declaration;
}
/**
* This method parses a simple function or a PHP 5.3 lambda function or
* closure.
*
* @return PHP_Depend_Code_AbstractCallable
* @since 0.9.5
*/
private function parseFunctionOrClosureDeclaration()
{
$this->tokenStack->push();
$this->consumeToken(self::T_FUNCTION);
$this->consumeComments();
$returnReference = $this->parseOptionalByReference();
if ($this->isNextTokenFormalParameterList()) {
$callable = $this->parseClosureDeclaration();
return $this->setNodePositionsAndReturn($callable);
} else {
$callable = $this->parseFunctionDeclaration();
$this->sourceFile->addChild($callable);
}
$callable->setDocComment($this->docComment);
$callable->setTokens($this->tokenStack->pop());
$this->prepareCallable($callable);
if ($returnReference) {
$callable->setReturnsReference();
}
$this->reset();
return $callable;
}
/**
* Parses an optional by reference token. The return value will be
* <b>true</b> when a reference token was found, otherwise this method will
* return <b>false</b>.
*
* @return boolean
* @since 0.9.8
*/
private function parseOptionalByReference()
{
if ($this->isNextTokenByReference()) {
return $this->parseByReference();
}
return false;
}
/**
* Tests that the next available token is the returns by reference token.
*
* @return boolean
* @since 0.9.8
*/
private function isNextTokenByReference()
{
return ($this->tokenizer->peek() === self::T_BITWISE_AND);
}
/**
* This method parses a returns by reference token and returns <b>true</b>.
*
* @return boolean
*/
private function parseByReference()
{
$this->consumeToken(self::T_BITWISE_AND);
$this->consumeComments();
return true;
}
/**
* Tests that the next available token is an opening parenthesis.
*
* @return boolean
* @since 0.9.10
*/
private function isNextTokenFormalParameterList()
{
$this->consumeComments();
return ($this->tokenizer->peek() === self::T_PARENTHESIS_OPEN);
}
/**
* This method parses a function declaration.
*
* @return PHP_Depend_Code_Function
* @since 0.9.5
*/
private function parseFunctionDeclaration()
{
$this->consumeComments();
// Next token must be the function identifier
$functionName = $this->parseFunctionName();
$function = $this->builder->buildFunction($functionName);
$function->setSourceFile($this->sourceFile);
$function->setUuid($this->uuidBuilder->forFunction($function));
$this->parseCallableDeclaration($function);
// First check for an existing namespace
if ($this->namespaceName !== null) {
$packageName = $this->namespaceName;
} else if ($this->packageName !== self::DEFAULT_PACKAGE) {
$packageName = $this->packageName;
} else {
$packageName = $this->globalPackageName;
}
$this->builder
->buildPackage($packageName)
->addFunction($function);
// Store function in source file, because we need them during the file's
// __wakeup() phase for function declarations within another function or
// method declaration.
$this->sourceFile->addChild($function);
return $function;
}
/**
* This method parses a method declaration.
*
* @return PHP_Depend_Code_Method
* @since 0.9.5
*/
private function parseMethodDeclaration()
{
// Read function keyword
$this->consumeToken(self::T_FUNCTION);
$this->consumeComments();
$returnsReference = $this->parseOptionalByReference();
$methodName = $this->parseFunctionName();
$method = $this->builder->buildMethod($methodName);
$method->setDocComment($this->docComment);
$method->setSourceFile($this->sourceFile);
$this->classOrInterface->addMethod($method);
$this->parseCallableDeclaration($method);
$this->prepareCallable($method);
if ($returnsReference === true) {
$method->setReturnsReference();
}
return $method;
}
/**
* This method parses a PHP 5.3 closure or lambda function.
*
* @return PHP_Depend_Code_ASTClosure
* @since 0.9.5
*/
private function parseClosureDeclaration()
{
$this->tokenStack->push();
if (self::T_FUNCTION === $this->tokenizer->peek()) {
$this->consumeToken(self::T_FUNCTION);
}
$closure = $this->builder->buildAstClosure();
$closure->setReturnsByReference($this->parseOptionalByReference());
$closure->addChild($this->parseFormalParameters());
$closure = $this->parseOptionalBoundVariables($closure);
$closure->addChild($this->parseScope());
return $this->setNodePositionsAndReturn($closure);
}
/**
* Parses a function or a method and adds it to the parent context node.
*
* @param PHP_Depend_Code_AbstractCallable $callable The context callable.
*
* @return void
*/
private function parseCallableDeclaration(
PHP_Depend_Code_AbstractCallable $callable
) {
$callable->addChild($this->parseFormalParameters());
$this->consumeComments();
if ($this->tokenizer->peek() == self::T_CURLY_BRACE_OPEN) {
$callable->addChild($this->parseScope());
} else {
$this->consumeToken(self::T_SEMICOLON);
}
}
/**
* Parses a trait use statement.
*
* @return PHP_Depend_Code_ASTTraitUseStatement
* @since 1.0.0
*/
private function parseTraitUseStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_USE);
$useStatement = $this->builder->buildAstTraitUseStatement();
$useStatement->addChild($this->parseTraitReference());
$this->consumeComments();
while (self::T_COMMA === $this->tokenizer->peek()) {
$this->consumeToken(self::T_COMMA);
$useStatement->addChild($this->parseTraitReference());
}
return $this->setNodePositionsAndReturn(
$this->parseOptionalTraitAdaptation($useStatement)
);
}
/**
* Parses a trait reference instance.
*
* @return PHP_Depend_Code_ASTTraitReference
* @since 1.0.0
*/
private function parseTraitReference()
{
$this->consumeComments();
$this->tokenStack->push();
return $this->setNodePositionsAndReturn(
$this->builder->buildAstTraitReference(
$this->parseQualifiedName()
)
);
}
/**
* Parses the adaptation list of the given use statement or simply reads
* the terminating semicolon, when no adaptation list exists.
*
* @param PHP_Depend_Code_ASTTraitUseStatement $useStatement The parent use
*
* @return PHP_Depend_Code_ASTTraitUseStatement
* @since 1.0.0
*/
private function parseOptionalTraitAdaptation(
PHP_Depend_Code_ASTTraitUseStatement $useStatement
) {
$this->consumeComments();
if (self::T_CURLY_BRACE_OPEN === $this->tokenizer->peek()) {
$useStatement->addChild($this->parseTraitAdaptation());
} else {
$this->consumeToken(self::T_SEMICOLON);
}
return $useStatement;
}
/**
* Parses the adaptation expression of a trait use statement.
*
* @return PHP_Depend_Code_ASTTraitAdaptation
* @since 1.0.0
*/
private function parseTraitAdaptation()
{
$this->tokenStack->push();
$adaptation = $this->builder->buildAstTraitAdaptation();
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
do {
$this->tokenStack->push();
$reference = $this->parseTraitMethodReference();
$this->consumeComments();
if (self::T_AS === $this->tokenizer->peek()) {
$stmt = $this->parseTraitAdaptationAliasStatement($reference);
} else {
$stmt = $this->parseTraitAdaptationPrecedenceStatement($reference);
}
$this->consumeComments();
$this->consumeToken(self::T_SEMICOLON);
$adaptation->addChild($this->setNodePositionsAndReturn($stmt));
$this->consumeComments();
} while (self::T_CURLY_BRACE_CLOSE !== $this->tokenizer->peek());
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
return $this->setNodePositionsAndReturn($adaptation);
}
/**
* Parses a trait method reference and returns the found reference as an
* <b>array</b>.
*
* The returned array with contain only one element, when the referenced
* method is specified by the method's name, without the declaring trait.
* When the method reference contains the declaring trait the returned
* <b>array</b> will contain two elements. The first element is the plain
* method name and the second element is an instance of the
* {@link PHP_Depend_Code_ASTTraitReference} class that represents the
* declaring trait.
*
* @return array
* @since 1.0.0
*/
private function parseTraitMethodReference()
{
$this->tokenStack->push();
$qualifiedName = $this->parseQualifiedName();
$this->consumeComments();
if (self::T_DOUBLE_COLON === $this->tokenizer->peek()) {
$traitReference = $this->setNodePositionsAndReturn(
$this->builder->buildAstTraitReference($qualifiedName)
);
$this->consumeToken(self::T_DOUBLE_COLON);
$this->consumeComments();
return array($this->parseFunctionName(), $traitReference);
}
$this->tokenStack->pop();
return array($qualifiedName);
}
/**
* Parses a trait adaptation alias statement.
*
* @param array $reference Parsed method reference array.
*
* @return PHP_Depend_Code_ASTTraitAdaptationAlias
* @since 1.0.0
*/
private function parseTraitAdaptationAliasStatement(array $reference)
{
$stmt = $this->builder->buildAstTraitAdaptationAlias($reference[0]);
if (2 === count($reference)) {
$stmt->addChild($reference[1]);
}
$this->consumeToken(self::T_AS);
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_PUBLIC:
$stmt->setNewModifier(PHP_Depend_ConstantsI::IS_PUBLIC);
$this->consumeToken(self::T_PUBLIC);
$this->consumeComments();
break;
case self::T_PROTECTED:
$stmt->setNewModifier(PHP_Depend_ConstantsI::IS_PROTECTED);
$this->consumeToken(self::T_PROTECTED);
$this->consumeComments();
break;
case self::T_PRIVATE:
$stmt->setNewModifier(PHP_Depend_ConstantsI::IS_PRIVATE);
$this->consumeToken(self::T_PRIVATE);
$this->consumeComments();
break;
}
if (self::T_SEMICOLON !== $this->tokenizer->peek()) {
$stmt->setNewName($this->parseFunctionName());
}
return $stmt;
}
/**
* Parses a trait adaptation precedence statement.
*
* @param array $reference Parsed method reference array.
*
* @return PHP_Depend_Code_ASTTraitAdaptationPrecedence
* @throws PHP_Depend_Parser_InvalidStateException
* @since 1.0.0
*/
private function parseTraitAdaptationPrecedenceStatement(array $reference)
{
if (count($reference) < 2) {
throw new PHP_Depend_Parser_InvalidStateException(
$this->tokenizer->next()->startLine,
$this->sourceFile->getFileName(),
'Expecting full qualified trait method name.'
);
}
$stmt = $this->builder->buildAstTraitAdaptationPrecedence($reference[0]);
$stmt->addChild($reference[1]);
$this->consumeToken(self::T_INSTEADOF);
$this->consumeComments();
$stmt->addChild($this->parseTraitReference());
$this->consumeComments();
while (self::T_COMMA === $this->tokenizer->peek()) {
$this->consumeToken(self::T_COMMA);
$stmt->addChild($this->parseTraitReference());
$this->consumeComments();
}
return $stmt;
}
/**
* Parses an allocation expression.
*
* <code>
* function foo()
* {
* // -------------
* new bar\Baz();
* // -------------
*
* // ---------
* new Foo();
* // ---------
* }
* </code>
*
* @return PHP_Depend_Code_ASTAllocationExpression
* @since 0.9.6
*/
private function parseAllocationExpression()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_NEW);
$allocation = $this->builder->buildAstAllocationExpression($token->image);
$allocation = $this->parseExpressionTypeReference($allocation, true);
if ($this->isNextTokenArguments()) {
$allocation->addChild($this->parseArguments());
}
return $this->setNodePositionsAndReturn($allocation);
}
/**
* Parses a eval-expression node.
*
* @return PHP_Depend_Code_ASTEvalExpression
* @since 0.9.12
*/
private function parseEvalExpression()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_EVAL);
$expr = $this->builder->buildAstEvalExpression($token->image);
$expr->addChild($this->parseParenthesisExpression());
return $this->setNodePositionsAndReturn($expr);
}
/**
* This method parses an exit-expression.
*
* @return PHP_Depend_Code_ASTExitExpression
* @since 0.9.12
*/
private function parseExitExpression()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_EXIT);
$expr = $this->builder->buildAstExitExpression($token->image);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_PARENTHESIS_OPEN) {
$expr->addChild($this->parseParenthesisExpression());
}
return $this->setNodePositionsAndReturn($expr);
}
/**
* Parses a clone-expression node.
*
* @return PHP_Depend_Code_ASTCloneExpression
* @since 0.9.12
*/
private function parseCloneExpression()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_CLONE);
$expr = $this->builder->buildAstCloneExpression($token->image);
$expr->addChild($this->parseExpression());
return $this->setNodePositionsAndReturn($expr);
}
/**
* This method parses a single list-statement node.
*
* @return PHP_Depend_Code_ASTListExpression
* @author Joey Mazzarelli
* @since 0.9.12
*/
private function parseListExpression()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_LIST);
$this->consumeComments();
$list = $this->builder->buildAstListExpression($token->image);
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$this->consumeComments();
while (($tokenType = $this->tokenizer->peek()) !== self::T_EOF) {
// The variable is optional:
// list(, , , , $something) = ...;
// is valid.
switch ($tokenType) {
case self::T_COMMA:
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
break;
case self::T_PARENTHESIS_CLOSE:
break 2;
case self::T_LIST:
$list->addChild($this->parseListExpression());
$this->consumeComments();
break;
default:
$list->addChild($this->parseVariableOrConstantOrPrimaryPrefix());
$this->consumeComments();
break;
}
}
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($list);
}
/**
* Parses a include-expression node.
*
* @return PHP_Depend_Code_ASTIncludeExpression
* @since 0.9.12
*/
private function parseIncludeExpression()
{
$expr = $this->builder->buildAstIncludeExpression();
return $this->parseRequireOrIncludeExpression($expr, self::T_INCLUDE);
}
/**
* Parses a include_once-expression node.
*
* @return PHP_Depend_Code_ASTIncludeExpression
* @since 0.9.12
*/
private function parseIncludeOnceExpression()
{
$expr = $this->builder->buildAstIncludeExpression();
$expr->setOnce();
return $this->parseRequireOrIncludeExpression($expr, self::T_INCLUDE_ONCE);
}
/**
* Parses a require-expression node.
*
* @return PHP_Depend_Code_ASTRequireExpression
* @since 0.9.12
*/
private function parseRequireExpression()
{
$expr = $this->builder->buildAstRequireExpression();
return $this->parseRequireOrIncludeExpression($expr, self::T_REQUIRE);
}
/**
* Parses a require_once-expression node.
*
* @return PHP_Depend_Code_ASTRequireExpression
* @since 0.9.12
*/
private function parseRequireOnceExpression()
{
$expr = $this->builder->buildAstRequireExpression();
$expr->setOnce();
return $this->parseRequireOrIncludeExpression($expr, self::T_REQUIRE_ONCE);
}
/**
* Parses a <b>require_once</b>-, <b>require</b>-, <b>include_once</b>- or
* <b>include</b>-expression node.
*
* @param PHP_Depend_Code_ASTExpression $expr The concrete expression type.
* @param integer $type The token type to read.
*
* @return PHP_Depend_Code_ASTExpression
* @since 0.9.12
*/
private function parseRequireOrIncludeExpression(
PHP_Depend_Code_ASTExpression $expr, $type
) {
$this->tokenStack->push();
$this->consumeToken($type);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_PARENTHESIS_OPEN) {
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$expr->addChild($this->parseOptionalExpression());
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
} else {
$expr->addChild($this->parseOptionalExpression());
}
return $this->setNodePositionsAndReturn($expr);
}
/**
* Parses a cast-expression node.
*
* @return PHP_Depend_Code_ASTCaseExpression
* @since 0.10.0
*/
private function parseCastExpression()
{
$token = $this->consumeToken($this->tokenizer->peek());
$expr = $this->builder->buildAstCastExpression($token->image);
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method will parse an increment-expression. Depending on the previous
* node this can be a {@link PHP_Depend_Code_ASTPostIncrementExpression} or
* {@link PHP_Depend_Code_ASTPostfixExpression}.
*
* @param array &$expressions List of previous parsed expression nodes.
*
* @return PHP_Depend_Code_ASTExpression
* @since 0.10.0
*/
private function parseIncrementExpression(array &$expressions)
{
if ($this->isReadWriteVariable(end($expressions))) {
return $this->parsePostIncrementExpression(array_pop($expressions));
}
return $this->parsePreIncrementExpression();
}
/**
* Parses a post increment-expression and adds the given child to that node.
*
* @param PHP_Depend_Code_ASTNode $child The child expression node.
*
* @return PHP_Depend_Code_ASTPostfixExpression
* @since 0.10.0
*/
private function parsePostIncrementExpression(PHP_Depend_Code_ASTNode $child)
{
$token = $this->consumeToken(self::T_INC);
$expr = $this->builder->buildAstPostfixExpression($token->image);
$expr->addChild($child);
$expr->configureLinesAndColumns(
$child->getStartLine(),
$token->endLine,
$child->getStartColumn(),
$token->endColumn
);
return $expr;
}
/**
* Parses a pre increment-expression and adds the given child to that node.
*
* @return PHP_Depend_Code_ASTPreIncrementExpression
* @since 0.10.0
*/
private function parsePreIncrementExpression()
{
$token = $this->consumeToken(self::T_INC);
$expr = $this->builder->buildAstPreIncrementExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method will parse an decrement-expression. Depending on the previous
* node this can be a {@link PHP_Depend_Code_ASTPostDecrementExpression} or
* {@link PHP_Depend_Code_ASTPostfixExpression}.
*
* @param array &$expressions List of previous parsed expression nodes.
*
* @return PHP_Depend_Code_ASTExpression
* @since 0.10.0
*/
private function parseDecrementExpression(array &$expressions)
{
if ($this->isReadWriteVariable(end($expressions))) {
return $this->parsePostDecrementExpression(array_pop($expressions));
}
return $this->parsePreDecrementExpression();
}
/**
* Parses a post decrement-expression and adds the given child to that node.
*
* @param PHP_Depend_Code_ASTNode $child The child expression node.
*
* @return PHP_Depend_Code_ASTPostfixExpression
* @since 0.10.0
*/
private function parsePostDecrementExpression(PHP_Depend_Code_ASTNode $child)
{
$token = $this->consumeToken(self::T_DEC);
$expr = $this->builder->buildAstPostfixExpression($token->image);
$expr->addChild($child);
$expr->configureLinesAndColumns(
$child->getStartLine(),
$token->endLine,
$child->getStartColumn(),
$token->endColumn
);
return $expr;
}
/**
* Parses a pre decrement-expression and adds the given child to that node.
*
* @return PHP_Depend_Code_ASTPreDecrementExpression
* @since 0.10.0
*/
private function parsePreDecrementExpression()
{
$token = $this->consumeToken(self::T_DEC);
$expr = $this->builder->buildAstPreDecrementExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* Parses one or more optional php <b>array</b> or <b>string</b> expressions.
*
* <code>
* ---------
* $array[0];
* ---------
*
* ----------------
* $array[1]['foo'];
* ----------------
*
* ----------------
* $string{1}[0]{0};
* ----------------
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The parent/context node instance.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.12
*/
protected function parseOptionalIndexExpression(PHP_Depend_Code_ASTNode $node)
{
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_CURLY_BRACE_OPEN:
return $this->parseStringIndexExpression($node);
case self::T_SQUARED_BRACKET_OPEN:
return $this->parseArrayIndexExpression($node);
}
return $node;
}
/**
* Parses an index expression as it is valid to access elements in a php
* string or array.
*
* @param PHP_Depend_Code_ASTNode $node The context source node.
* @param PHP_Depend_Code_ASTExpression $expr The concrete index expression.
* @param integer $open The open token type.
* @param integer $close The close token type.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.12
*/
private function parseIndexExpression(
PHP_Depend_Code_ASTNode $node,
PHP_Depend_Code_ASTExpression $expr,
$open,
$close
) {
$this->consumeToken($open);
if (($child = $this->parseOptionalExpression()) != null) {
$expr->addChild($child);
}
$token = $this->consumeToken($close);
$expr->configureLinesAndColumns(
$node->getStartLine(),
$token->endLine,
$node->getStartColumn(),
$token->endColumn
);
return $this->parseOptionalIndexExpression($expr);
}
/**
* Parses a mandatory array index expression.
*
* <code>
* // ---
* $array[0];
* // ---
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The context source node.
*
* @return PHP_Depend_Code_ASTArrayIndexExpression
* @since 0.9.12
*/
private function parseArrayIndexExpression(PHP_Depend_Code_ASTNode $node)
{
$expr = $this->builder->buildAstArrayIndexExpression();
$expr->addChild($node);
return $this->parseIndexExpression(
$node,
$expr,
self::T_SQUARED_BRACKET_OPEN,
self::T_SQUARED_BRACKET_CLOSE
);
}
/**
* Parses a mandatory array index expression.
*
* <code>
* // ---
* $string{0};
* // ---
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The context source node.
*
* @return PHP_Depend_Code_ASTStringIndexExpression
* @since 0.9.12
*/
private function parseStringIndexExpression(PHP_Depend_Code_ASTNode $node)
{
$expr = $this->builder->buildAstStringIndexExpression();
$expr->addChild($node);
return $this->parseIndexExpression(
$node,
$expr,
self::T_CURLY_BRACE_OPEN,
self::T_CURLY_BRACE_CLOSE
);
}
/**
* This method checks if the next available token starts an arguments node.
*
* @return boolean
* @since 0.9.8
*/
private function isNextTokenArguments()
{
$this->consumeComments();
return $this->tokenizer->peek() === self::T_PARENTHESIS_OPEN;
}
/**
* This method configures the given node with its start and end positions.
*
* @param PHP_Depend_Code_ASTNode $node The node to prepare.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.8
*/
private function setNodePositionsAndReturn(PHP_Depend_Code_ASTNode $node)
{
$tokens = $this->stripTrailingComments($this->tokenStack->pop());
$end = $tokens[count($tokens) - 1];
$start = $tokens[0];
$node->configureLinesAndColumns(
$start->startLine,
$end->endLine,
$start->startColumn,
$end->endColumn
);
return $node;
}
/**
* Strips all trailing comments from the given token stream.
*
* @param PHP_Depend_Token[] $tokens Original token stream.
*
* @return PHP_Depend_Token[]
* @since 1.0.0
*/
private function stripTrailingComments(array $tokens)
{
$comments = array(self::T_COMMENT, self::T_DOC_COMMENT);
while (count($tokens) > 1 && in_array(end($tokens)->type, $comments)) {
array_pop($tokens);
}
return $tokens;
}
/**
* This method parse an instance of expression with its associated class or
* interface reference.
*
* <code>
* ----------------
* ($object instanceof Clazz);
* ----------------
*
* ------------------------
* ($object instanceof Clazz::$clazz);
* ------------------------
*
* -----------------
* ($object instanceof $clazz);
* -----------------
*
* -----------------------
* ($object instanceof $clazz->type);
* -----------------------
*
* -----------------------------
* ($object instanceof static|self|parent);
* -----------------------------
* </code>
*
* @return PHP_Depend_Code_ASTInstanceOfExpression
* @since 0.9.6
*/
private function parseInstanceOfExpression()
{
// Consume the "instanceof" keyword and strip comments
$token = $this->consumeToken(self::T_INSTANCEOF);
return $this->parseExpressionTypeReference(
$this->builder->buildAstInstanceOfExpression($token->image), false
);
}
/**
* Parses an isset-expression node.
*
* <code>
* // -----------
* if (isset($foo)) {
* // -----------
* }
*
* // -----------------------
* if (isset($foo, $bar, $baz)) {
* // -----------------------
* }
* </code>
*
* @return PHP_Depend_Code_ASTIssetExpression
* @since 0.9.12
*/
private function parseIssetExpression()
{
$startToken = $this->consumeToken(self::T_ISSET);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$expr = $this->builder->buildAstIssetExpression();
$expr = $this->parseVariableList($expr);
$stopToken = $this->consumeToken(self::T_PARENTHESIS_CLOSE);
$expr->configureLinesAndColumns(
$startToken->startLine,
$stopToken->endLine,
$startToken->startColumn,
$stopToken->endColumn
);
return $expr;
}
/**
* This method parses a type identifier as it is used in expression nodes
* like {@link PHP_Depend_Code_ASTInstanceOfExpression} or an object
* allocation node like {@link PHP_Depend_Code_ASTAllocationExpression}.
*
* @param PHP_Depend_Code_ASTNode $expr The parent expression node.
* @param boolean $classRef Create a class reference.
*
* @return PHP_Depend_Code_ASTNode
*/
private function parseExpressionTypeReference(
PHP_Depend_Code_ASTNode $expr, $classRef
) {
// Peek next token and look for a static type identifier
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_DOLLAR:
case self::T_VARIABLE:
// TODO: Parse variable or Member Primary Prefix + Property Postfix
$ref = $this->parseVariableOrFunctionPostfixOrMemberPrimaryPrefix();
break;
case self::T_SELF:
$ref = $this->parseSelfReference($this->consumeToken(self::T_SELF));
break;
case self::T_PARENT:
$ref = $this->parseParentReference($this->consumeToken(self::T_PARENT));
break;
case self::T_STATIC:
$ref = $this->parseStaticReference($this->consumeToken(self::T_STATIC));
break;
default:
$ref = $this->parseClassOrInterfaceReference($classRef);
break;
}
$expr->addChild(
$this->parseOptionalMemberPrimaryPrefix(
$this->parseOptionalStaticMemberPrimaryPrefix($ref)
)
);
return $expr;
}
/**
* This method parses a conditional-expression.
*
* <code>
* --------------
* $foo = ($bar ? 42 : 23);
* --------------
* </code>
*
* @return PHP_Depend_Code_ASTConditionalExpression
* @since 0.9.8
*/
private function parseConditionalExpression()
{
$this->tokenStack->push();
$this->consumeToken(self::T_QUESTION_MARK);
$expr = $this->builder->buildAstConditionalExpression();
if (($child = $this->parseOptionalExpression()) != null) {
$expr->addChild($child);
}
$this->consumeToken(self::T_COLON);
$expr->addChild($this->parseExpression());
return $this->setNodePositionsAndReturn($expr);
}
/**
* This method parses a shift left expression node.
*
* @return PHP_Depend_Code_ASTShiftLeftExpression
* @since 1.0.1
*/
private function parseShiftLeftExpression()
{
$token = $this->consumeToken(self::T_SL);
$expr = $this->builder->buildAstShiftLeftExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a shift right expression node.
*
* @return PHP_Depend_Code_ASTShiftRightExpression
* @since 1.0.1
*/
private function parseShiftRightExpression()
{
$token = $this->consumeToken(self::T_SR);
$expr = $this->builder->buildAstShiftRightExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a boolean and-expression.
*
* @return PHP_Depend_Code_ASTBooleanAndExpression
* @since 0.9.8
*/
private function parseBooleanAndExpression()
{
$token = $this->consumeToken(self::T_BOOLEAN_AND);
$expr = $this->builder->buildAstBooleanAndExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a boolean or-expression.
*
* @return PHP_Depend_Code_ASTBooleanOrExpression
* @since 0.9.8
*/
private function parseBooleanOrExpression()
{
$token = $this->consumeToken(self::T_BOOLEAN_OR);
$expr = $this->builder->buildAstBooleanOrExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a logical <b>and</b>-expression.
*
* @return PHP_Depend_Code_ASTLogicalAndExpression
* @since 0.9.8
*/
private function parseLogicalAndExpression()
{
$token = $this->consumeToken(self::T_LOGICAL_AND);
$expr = $this->builder->buildAstLogicalAndExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a logical <b>or</b>-expression.
*
* @return PHP_Depend_Code_ASTLogicalOrExpression
* @since 0.9.8
*/
private function parseLogicalOrExpression()
{
$token = $this->consumeToken(self::T_LOGICAL_OR);
$expr = $this->builder->buildAstLogicalOrExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* This method parses a logical <b>xor</b>-expression.
*
* @return PHP_Depend_Code_ASTLogicalXorExpression
* @since 0.9.8
*/
private function parseLogicalXorExpression()
{
$token = $this->consumeToken(self::T_LOGICAL_XOR);
$expr = $this->builder->buildAstLogicalXorExpression();
$expr->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $expr;
}
/**
* Parses a class or interface reference node.
*
* @param boolean $classReference Force a class reference.
*
* @return PHP_Depend_Code_ASTClassOrInterfaceReference
* @since 0.9.8
*/
private function parseClassOrInterfaceReference($classReference)
{
$this->tokenStack->push();
if ($classReference === true) {
return $this->setNodePositionsAndReturn(
$this->builder->buildAstClassReference(
$this->parseQualifiedName()
)
);
}
return $this->setNodePositionsAndReturn(
$this->builder->buildAstClassOrInterfaceReference(
$this->parseQualifiedName()
)
);
}
/**
* This method parses a brace expression and adds all parsed node instances
* to the given {@link PHP_Depend_Code_ASTNode} object. Finally it returns
* the prepared input node.
*
* A brace expression can be a compound:
*
* <code>
* $this->{$foo ? 'foo' : 'bar'}();
* </code>
*
* or a parameter list:
*
* <code>
* $this->foo($bar, $baz);
* </code>
*
* or an array index:
*
* <code>
* $foo[$bar];
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The context node instance.
* @param PHP_Depend_Token $start The opening token.
* @param integer $closeToken The brace close token type.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_TokenStreamEndException When this method reaches
* the token stream end without terminating the brache expression.
* @since 0.9.6
*/
private function parseBraceExpression(
PHP_Depend_Code_ASTNode $node,
PHP_Depend_Token $start,
$closeToken
) {
if (is_object($expr = $this->parseOptionalExpression())) {
$node->addChild($expr);
}
$end = $this->consumeToken($closeToken);
$node->configureLinesAndColumns(
$start->startLine,
$end->endLine,
$start->startColumn,
$end->endColumn
);
return $node;
}
/**
* Parses the body of the given statement instance and adds all parsed nodes
* to that statement.
*
* @param PHP_Depend_Code_ASTStatement $stmt The owning statement.
*
* @return PHP_Depend_Code_ASTStatement
* @since 0.9.12
*/
private function parseStatementBody(PHP_Depend_Code_ASTStatement $stmt)
{
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_CURLY_BRACE_OPEN) {
$stmt->addChild($this->parseRegularScope());
} else if ($tokenType === self::T_COLON) {
$stmt->addChild($this->parseAlternativeScope());
} else {
$stmt->addChild($this->parseStatement());
}
return $stmt;
}
/**
* Parse a scope enclosed by curly braces.
*
* @return PHP_Depend_Code_ASTScope
* @since 0.9.12
*/
private function parseRegularScope()
{
$this->tokenStack->push();
$this->consumeComments();
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
$scope = $this->parseScopeStatements();
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
return $this->setNodePositionsAndReturn($scope);
}
/**
* Parses the scope of a statement that is surrounded with PHP's alternative
* syntax for statements.
*
* @return PHP_Depend_Code_ASTScopeStatement
* @since 0.10.0
*/
private function parseAlternativeScope()
{
$this->tokenStack->push();
$this->consumeToken(self::T_COLON);
$scope = $this->parseScopeStatements();
$this->parseOptionalAlternativeScopeTermination();
return $this->setNodePositionsAndReturn($scope);
}
/**
* Parses all statements that exist in a scope an adds them to a scope
* instance.
*
* @return PHP_Depend_Code_ASTScopeStatement
* @since 0.10.0
*/
private function parseScopeStatements()
{
$scope = $this->builder->buildAstScopeStatement();
while (($child = $this->parseOptionalStatement()) != null) {
if ($child instanceof PHP_Depend_Code_ASTNode) {
$scope->addChild($child);
}
}
return $scope;
}
/**
* Parses the termination of a scope statement that uses PHP's laternative
* syntax format.
*
* @return void
* @since 0.10.0
*/
private function parseOptionalAlternativeScopeTermination()
{
$tokenType = $this->tokenizer->peek();
if ($this->isAlternativeScopeTermination($tokenType)) {
$this->parseAlternativeScopeTermination($tokenType);
}
}
/**
* This method returns <b>true</b> when the given token identifier represents
* the end token of a alternative scope termination symbol. Otherwise this
* method will return <b>false</b>.
*
* @param integer $tokenType The token type identifier.
*
* @return boolean
* @since 0.10.0
*/
private function isAlternativeScopeTermination($tokenType)
{
return in_array(
$tokenType,
array(
self::T_ENDDECLARE,
self::T_ENDFOR,
self::T_ENDFOREACH,
self::T_ENDIF,
self::T_ENDSWITCH,
self::T_ENDWHILE
)
);
}
/**
* Parses a series of tokens that represent an alternative scope termination.
*
* @param integer $tokenType The token type identifier.
*
* @return void
* @since 0.10.0
*/
private function parseAlternativeScopeTermination($tokenType)
{
$this->consumeToken($tokenType);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_SEMICOLON) {
$this->consumeToken(self::T_SEMICOLON);
} else {
$this->parseNonePhpCode();
}
}
/**
* This method parses multiple expressions and adds them as children to the
* given <b>$exprList</b> node.
*
* @param PHP_Depend_Code_ASTNode $exprList Parent that accepts multiple expr.
*
* @return PHP_Depend_Code_ASTNode
* @since 1.0.0
*/
private function parseExpressionList(PHP_Depend_Code_ASTNode $exprList)
{
$this->consumeComments();
while ($expr = $this->parseOptionalExpression()) {
$exprList->addChild($expr);
$this->consumeComments();
if (self::T_COMMA === $this->tokenizer->peek()) {
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
} else {
break;
}
}
return $exprList;
}
/**
* This method parses an expression node and returns it. When no expression
* was found this method will throw an InvalidStateException.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 1.0.1
*/
private function parseExpression()
{
if (null === ($expr = $this->parseOptionalExpression())) {
$token = $this->consumeToken($this->tokenizer->peek());
throw new PHP_Depend_Parser_InvalidStateException(
$token->startLine,
$this->sourceFile->getFileName(),
'Mandatory expression expected.'
);
}
return $expr;
}
/**
* This method optionally parses an expression node and returns it. When no
* expression was found this method will return <b>null</b>.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseOptionalExpression()
{
$expressions = array();
while (($tokenType = $this->tokenizer->peek()) != self::T_EOF) {
$expr = null;
switch ($tokenType) {
case self::T_COMMA:
case self::T_AS:
case self::T_BREAK:
case self::T_CLOSE_TAG:
case self::T_COLON:
case self::T_CONTINUE:
case self::T_CURLY_BRACE_CLOSE:
case self::T_DECLARE:
case self::T_DO:
case self::T_DOUBLE_ARROW:
case self::T_ECHO:
case self::T_END_HEREDOC:
case self::T_ENDFOREACH:
case self::T_FOR:
case self::T_FOREACH:
case self::T_GLOBAL:
case self::T_GOTO:
case self::T_IF:
case self::T_PARENTHESIS_CLOSE:
case self::T_RETURN:
case self::T_SEMICOLON:
case self::T_SQUARED_BRACKET_CLOSE:
case self::T_SWITCH:
case self::T_THROW:
case self::T_TRY:
case self::T_UNSET:
case self::T_WHILE:
break 2;
case self::T_SELF:
case self::T_STRING:
case self::T_PARENT:
case self::T_STATIC:
case self::T_DOLLAR:
case self::T_VARIABLE:
case self::T_BACKSLASH:
case self::T_NAMESPACE:
$expressions[] = $this->parseVariableOrConstantOrPrimaryPrefix();
break;
case ($this->isArrayStartDelimiter()):
$expressions[] = $this->doParseArray();
break;
case self::T_NULL:
case self::T_TRUE:
case self::T_FALSE:
case self::T_LNUMBER:
case self::T_DNUMBER:
case self::T_BACKTICK:
case self::T_DOUBLE_QUOTE:
case self::T_CONSTANT_ENCAPSED_STRING:
$expressions[] = $this->parseLiteralOrString();
break;
case self::T_NEW:
$expressions[] = $this->parseAllocationExpression();
break;
case self::T_EVAL:
$expressions[] = $this->parseEvalExpression();
break;
case self::T_CLONE:
$expressions[] = $this->parseCloneExpression();
break;
case self::T_INSTANCEOF:
$expressions[] = $this->parseInstanceOfExpression();
break;
case self::T_ISSET:
$expressions[] = $this->parseIssetExpression();
break;
case self::T_LIST:
$expressions[] = $this->parseListExpression();
break;
case self::T_QUESTION_MARK:
$expressions[] = $this->parseConditionalExpression();
break;
case self::T_BOOLEAN_AND:
$expressions[] = $this->parseBooleanAndExpression();
break;
case self::T_BOOLEAN_OR:
$expressions[] = $this->parseBooleanOrExpression();
break;
case self::T_LOGICAL_AND:
$expressions[] = $this->parseLogicalAndExpression();
break;
case self::T_LOGICAL_OR:
$expressions[] = $this->parseLogicalOrExpression();
break;
case self::T_LOGICAL_XOR:
$expressions[] = $this->parseLogicalXorExpression();
break;
case self::T_FUNCTION:
$expressions[] = $this->parseClosureDeclaration();
break;
case self::T_PARENTHESIS_OPEN:
$expressions[] = $this->parseParenthesisExpressionOrPrimaryPrefix();
break;
case self::T_EXIT:
$expressions[] = $this->parseExitExpression();
break;
case self::T_START_HEREDOC:
$expressions[] = $this->parseHeredoc();
break;
case self::T_CURLY_BRACE_OPEN:
$expressions[] = $this->parseBraceExpression(
$this->builder->buildAstExpression(),
$this->consumeToken(self::T_CURLY_BRACE_OPEN),
self::T_CURLY_BRACE_CLOSE
);
break;
case self::T_INCLUDE:
$expressions[] = $this->parseIncludeExpression();
break;
case self::T_INCLUDE_ONCE:
$expressions[] = $this->parseIncludeOnceExpression();
break;
case self::T_REQUIRE:
$expressions[] = $this->parseRequireExpression();
break;
case self::T_REQUIRE_ONCE:
$expressions[] = $this->parseRequireOnceExpression();
break;
case self::T_DEC:
$expressions[] = $this->parseDecrementExpression($expressions);
break;
case self::T_INC:
$expressions[] = $this->parseIncrementExpression($expressions);
break;
case self::T_SL:
$expressions[] = $this->parseShiftLeftExpression();
break;
case self::T_SR:
$expressions[] = $this->parseShiftRightExpression();
break;
case self::T_DIR:
case self::T_FILE:
case self::T_LINE:
case self::T_NS_C:
case self::T_FUNC_C:
case self::T_CLASS_C:
case self::T_METHOD_C:
$expressions[] = $this->parseConstant();
break;
case self::T_INT_CAST:
case self::T_BOOL_CAST:
case self::T_ARRAY_CAST:
case self::T_UNSET_CAST:
case self::T_OBJECT_CAST:
case self::T_DOUBLE_CAST:
case self::T_STRING_CAST:
$expressions[] = $this->parseCastExpression();
break;
case self::T_EQUAL:
case self::T_OR_EQUAL:
case self::T_SL_EQUAL:
case self::T_SR_EQUAL:
case self::T_AND_EQUAL:
case self::T_DIV_EQUAL:
case self::T_MOD_EQUAL:
case self::T_MUL_EQUAL:
case self::T_XOR_EQUAL:
case self::T_PLUS_EQUAL:
case self::T_MINUS_EQUAL:
case self::T_CONCAT_EQUAL:
$expressions[] = $this->parseAssignmentExpression(
array_pop($expressions)
);
break;
// TODO: Handle comments here
case self::T_COMMENT:
case self::T_DOC_COMMENT:
$this->consumeToken($tokenType);
break;
case self::T_PRINT: // TODO: Implement print expression
case self::T_STRING_VARNAME: // TODO: Implement this
case self::T_PLUS: // TODO: Make this a arithmetic expression
case self::T_MINUS:
case self::T_MUL:
case self::T_DIV:
case self::T_MOD:
case self::T_IS_EQUAL: // TODO: Implement compare expressions
case self::T_IS_NOT_EQUAL:
case self::T_IS_IDENTICAL:
case self::T_IS_NOT_IDENTICAL:
case self::T_IS_GREATER_OR_EQUAL:
case self::T_IS_SMALLER_OR_EQUAL:
case self::T_ANGLE_BRACKET_OPEN:
case self::T_ANGLE_BRACKET_CLOSE:
case self::T_EMPTY:
case self::T_CONCAT:
case self::T_BITWISE_OR:
case self::T_BITWISE_AND:
case self::T_BITWISE_NOT:
case self::T_BITWISE_XOR:
$token = $this->consumeToken($tokenType);
$expr = $this->builder->buildAstExpression();
$expr->setImage($token->image);
$expr->setStartLine($token->startLine);
$expr->setStartColumn($token->startColumn);
$expr->setEndLine($token->endLine);
$expr->setEndColumn($token->endColumn);
$expressions[] = $expr;
break;
case self::T_AT:
case self::T_EXCLAMATION_MARK:
$token = $this->consumeToken($tokenType);
$expr = $this->builder->buildAstUnaryExpression($token->image);
$expr->setStartLine($token->startLine);
$expr->setStartColumn($token->startColumn);
$expr->setEndLine($token->endLine);
$expr->setEndColumn($token->endColumn);
$expressions[] = $expr;
break;
default:
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->consumeToken($tokenType),
$this->sourceFile->getFileName()
);
}
}
$expressions = $this->reduce($expressions);
$count = count($expressions);
if ($count == 0) {
return null;
} else if ($count == 1) {
return $expressions[0];
}
$expr = $this->builder->buildAstExpression();
foreach ($expressions as $node) {
$expr->addChild($node);
}
$expr->configureLinesAndColumns(
$expressions[0]->getStartLine(),
$expressions[$count - 1]->getEndLine(),
$expressions[0]->getStartColumn(),
$expressions[$count - 1]->getEndColumn()
);
return $expr;
}
/**
* Applies all reduce rules against the given expression list.
*
* @param PHP_Depend_Code_ASTExpression[] $expressions Unprepared input
* array with parsed expression nodes found in the source tree.
*
* @return PHP_Depend_Code_ASTExpression[]
* @since 0.10.0
*/
private function reduce(array $expressions)
{
return $this->reduceUnaryExpression($expressions);
}
/**
* Reduces all unary-expressions in the given expression list.
*
* @param PHP_Depend_Code_ASTExpression[] $expressions Unprepared input
* array with parsed expression nodes found in the source tree.
*
* @return PHP_Depend_Code_ASTExpression[]
* @since 0.10.0
*/
private function reduceUnaryExpression(array $expressions)
{
for ($i = count($expressions) - 2; $i >= 0; --$i) {
$expr = $expressions[$i];
if ($expr instanceof PHP_Depend_Code_ASTUnaryExpression) {
$child = $expressions[$i + 1];
$expr->addChild($child);
$expr->setEndColumn($child->getEndColumn());
$expr->setEndLine($child->getEndLine());
unset($expressions[$i + 1]);
}
}
return array_values($expressions);
}
/**
* This method parses a switch statement.
*
* @return PHP_Depend_Code_ASTSwitchStatement
* @since 0.9.8
*/
private function parseSwitchStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_SWITCH);
$switch = $this->builder->buildAstSwitchStatement();
$switch->addChild($this->parseParenthesisExpression());
$this->parseSwitchStatementBody($switch);
return $this->setNodePositionsAndReturn($switch);
}
/**
* Parses the body of a switch statement.
*
* @param PHP_Depend_Code_ASTSwitchStatement $switch The parent switch stmt.
*
* @return PHP_Depend_Code_ASTSwitchStatement
* @since 0.9.8
*/
private function parseSwitchStatementBody(
PHP_Depend_Code_ASTSwitchStatement $switch
) {
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_CURLY_BRACE_OPEN) {
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
} else {
$this->consumeToken(self::T_COLON);
}
while (($tokenType = $this->tokenizer->peek()) !== self::T_EOF) {
switch ($tokenType) {
case self::T_ENDSWITCH:
$this->parseAlternativeScopeTermination(self::T_ENDSWITCH);
return $switch;
case self::T_CURLY_BRACE_CLOSE:
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
return $switch;
case self::T_CASE:
$switch->addChild($this->parseSwitchLabel());
break;
case self::T_DEFAULT:
$switch->addChild($this->parseSwitchLabelDefault());
break;
case self::T_COMMENT:
case self::T_DOC_COMMENT:
$this->consumeToken($tokenType);
break;
default:
break 2;
}
}
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->tokenizer->getSourceFile()
);
}
/**
* This method parses a case label of a switch statement.
*
* @return PHP_Depend_Code_ASTSwitchLabel
* @since 0.9.8
*/
private function parseSwitchLabel()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_CASE);
$label = $this->builder->buildAstSwitchLabel($token->image);
$label->addChild($this->parseExpression());
if ($this->tokenizer->peek() === self::T_COLON) {
$this->consumeToken(self::T_COLON);
} else {
$this->consumeToken(self::T_SEMICOLON);
}
$this->parseSwitchLabelBody($label);
return $this->setNodePositionsAndReturn($label);
}
/**
* This method parses the default label of a switch statement.
*
* @return PHP_Depend_Code_ASTSwitchLabel
* @since 0.9.8
*/
private function parseSwitchLabelDefault()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_DEFAULT);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_COLON) {
$this->consumeToken(self::T_COLON);
} else {
$this->consumeToken(self::T_SEMICOLON);
}
$label = $this->builder->buildAstSwitchLabel($token->image);
$label->setDefault();
$this->parseSwitchLabelBody($label);
return $this->setNodePositionsAndReturn($label);
}
/**
* Parses the body of an switch label node.
*
* @param PHP_Depend_Code_ASTSwitchLabel $label The context switch label.
*
* @return PHP_Depend_Code_ASTSwitchLabel
*/
private function parseSwitchLabelBody(PHP_Depend_Code_ASTSwitchLabel $label)
{
$curlyBraceCount = 0;
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
switch ($tokenType) {
case self::T_CURLY_BRACE_OPEN:
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
++$curlyBraceCount;
break;
case self::T_CURLY_BRACE_CLOSE:
if ($curlyBraceCount === 0) {
return $label;
}
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
--$curlyBraceCount;
break;
case self::T_CASE:
case self::T_DEFAULT:
case self::T_ENDSWITCH:
return $label;
default:
$statement = $this->parseOptionalStatement();
if ($statement === null) {
$this->consumeToken($tokenType);
} else if ($statement instanceof PHP_Depend_Code_ASTNode) {
$label->addChild($statement);
}
// TODO: Change the <else if> into and <else> when the ast
// implementation is finished.
break;
}
$tokenType = $this->tokenizer->peek();
}
throw new PHP_Depend_Parser_TokenStreamEndException($this->tokenizer);
}
/**
* Parses the termination token for a statement. This termination token can
* be a semicolon or a closing php tag.
*
* @return void
* @since 0.9.12
*/
private function parseStatementTermination()
{
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_SEMICOLON) {
$this->consumeToken(self::T_SEMICOLON);
} else {
$this->parseNonePhpCode();
}
}
/**
* This method parses a try-statement + associated catch-statements.
*
* @return PHP_Depend_Code_ASTTryStatement
* @since 0.9.12
*/
private function parseTryStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_TRY);
$stmt = $this->builder->buildAstTryStatement($token->image);
$stmt->addChild($this->parseRegularScope());
do {
$stmt->addChild($this->parseCatchStatement());
$this->consumeComments();
} while ($this->tokenizer->peek() === self::T_CATCH);
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a throw-statement.
*
* @return PHP_Depend_Code_ASTThrowStatement
* @since 0.9.12
*/
private function parseThrowStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_THROW);
$stmt = $this->builder->buildAstThrowStatement($token->image);
$stmt->addChild($this->parseExpression());
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a goto-statement.
*
* @return PHP_Depend_Code_ASTGotoStatement
* @since 0.9.12
*/
private function parseGotoStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_GOTO);
$this->consumeComments();
$token = $this->consumeToken(self::T_STRING);
$this->parseStatementTermination();
$stmt = $this->builder->buildAstGotoStatement($token->image);
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a label-statement.
*
* @return PHP_Depend_Code_ASTLabelStatement
* @since 0.9.12
*/
private function parseLabelStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_STRING);
$this->consumeComments();
$this->consumeToken(self::T_COLON);
return $this->setNodePositionsAndReturn(
$this->builder->buildAstLabelStatement($token->image)
);
}
/**
* This method parses a global-statement.
*
* @return PHP_Depend_Code_ASTGlobalStatement
* @since 0.9.12
*/
private function parseGlobalStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_GLOBAL);
$stmt = $this->builder->buildAstGlobalStatement();
$stmt = $this->parseVariableList($stmt);
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a unset-statement.
*
* @return PHP_Depend_Code_ASTUnsetStatement
* @since 0.9.12
*/
private function parseUnsetStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_UNSET);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$stmt = $this->builder->buildAstUnsetStatement();
$stmt = $this->parseVariableList($stmt);
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a catch-statement.
*
* @return PHP_Depend_Code_ASTCatchStatement
* @since 0.9.8
*/
private function parseCatchStatement()
{
$this->tokenStack->push();
$this->consumeComments();
$token = $this->consumeToken(self::T_CATCH);
$catch = $this->builder->buildAstCatchStatement($token->image);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$catch->addChild(
$this->builder->buildAstClassOrInterfaceReference(
$this->parseQualifiedName()
)
);
$this->consumeComments();
$catch->addChild($this->parseVariable());
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
$catch->addChild($this->parseRegularScope());
return $this->setNodePositionsAndReturn($catch);
}
/**
* This method parses a single if-statement node.
*
* @return PHP_Depend_Code_ASTIfStatement
* @since 0.9.8
*/
private function parseIfStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_IF);
$stmt = $this->builder->buildAstIfStatement($token->image);
$stmt->addChild($this->parseParenthesisExpression());
$this->parseStatementBody($stmt);
$this->parseOptionalElseOrElseIfStatement($stmt);
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a single elseif-statement node.
*
* @return PHP_Depend_Code_ASTElseIfStatement
* @since 0.9.8
*/
private function parseElseIfStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_ELSEIF);
$stmt = $this->builder->buildAstElseIfStatement($token->image);
$stmt->addChild($this->parseParenthesisExpression());
$this->parseStatementBody($stmt);
$this->parseOptionalElseOrElseIfStatement($stmt);
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses an optional else-, else+if- or elseif-statement.
*
* @param PHP_Depend_Code_ASTStatement $stmt The owning if/elseif statement.
*
* @return PHP_Depend_Code_ASTStatement
* @since 0.9.12
*/
private function parseOptionalElseOrElseIfStatement(
PHP_Depend_Code_ASTStatement $stmt
) {
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_ELSE:
$this->consumeToken(self::T_ELSE);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_IF) {
$stmt->addChild($this->parseIfStatement());
} else {
$this->parseStatementBody($stmt);
}
break;
case self::T_ELSEIF:
$stmt->addChild($this->parseElseIfStatement());
break;
}
return $stmt;
}
/**
* This method parses a single for-statement node.
*
* @return PHP_Depend_Code_ASTForStatement
* @since 0.9.8
*/
private function parseForStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_FOR);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$stmt = $this->builder->buildAstForStatement($token->image);
if (($init = $this->parseForInit()) !== null) {
$stmt->addChild($init);
}
$this->consumeToken(self::T_SEMICOLON);
if (($expr = $this->parseForExpression()) !== null) {
$stmt->addChild($expr);
}
$this->consumeToken(self::T_SEMICOLON);
if (($update = $this->parseForUpdate()) !== null) {
$stmt->addChild($update);
}
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($this->parseStatementBody($stmt));
}
/**
* Parses the init part of a for-statement.
*
* <code>
* ------------------------
* for ($x = 0, $y = 23, $z = 42; $x < $y; ++$x) {}
* ------------------------
* </code>
*
* @return PHP_Depend_Code_ASTForInit
* @since 0.9.8
*/
private function parseForInit()
{
$this->consumeComments();
if (self::T_SEMICOLON === $this->tokenizer->peek()) {
return null;
}
$this->tokenStack->push();
$init = $this->builder->buildAstForInit();
$this->parseExpressionList($init);
return $this->setNodePositionsAndReturn($init);
}
/**
* Parses the expression part of a for-statement.
*
* @return PHP_Depend_Code_ASTExpression
* @since 0.9.12
*/
private function parseForExpression()
{
return $this->parseOptionalExpression();
}
/**
* Parses the update part of a for-statement.
*
* <code>
* -------------------------------
* for ($x = 0, $y = 23, $z = 42; $x < $y; ++$x, $y = $x + 1, $z = $x + 2) {}
* -------------------------------
* </code>
*
* @return PHP_Depend_Code_ASTForUpdate
* @since 0.9.12
*/
private function parseForUpdate()
{
$this->consumeComments();
if (self::T_PARENTHESIS_CLOSE === $this->tokenizer->peek()) {
return null;
}
$this->tokenStack->push();
$update = $this->builder->buildAstForUpdate();
$this->parseExpressionList($update);
return $this->setNodePositionsAndReturn($update);
}
/**
* This method parses a single foreach-statement node.
*
* @return PHP_Depend_Code_ASTForeachStatement
* @since 0.9.8
*/
private function parseForeachStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_FOREACH);
$foreach = $this->builder->buildAstForeachStatement($token->image);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$foreach->addChild($this->parseExpression());
$this->consumeToken(self::T_AS);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_BITWISE_AND) {
$foreach->addChild($this->parseVariableOrMemberByReference());
} else {
$foreach->addChild($this->parseVariableOrConstantOrPrimaryPrefix());
if ($this->tokenizer->peek() === self::T_DOUBLE_ARROW) {
$this->consumeToken(self::T_DOUBLE_ARROW);
$foreach->addChild(
$this->parseVariableOrMemberOptionalByReference()
);
}
}
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn(
$this->parseStatementBody($foreach)
);
}
/**
* This method parses a single while-statement node.
*
* @return PHP_Depend_Code_ASTWhileStatement
* @since 0.9.8
*/
private function parseWhileStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_WHILE);
$stmt = $this->builder->buildAstWhileStatement($token->image);
$stmt->addChild($this->parseParenthesisExpression());
return $this->setNodePositionsAndReturn(
$this->parseStatementBody($stmt)
);
}
/**
* This method parses a do/while-statement.
*
* @return PHP_Depend_Code_ASTDoWhileStatement
* @sibce 0.9.12
*/
private function parseDoWhileStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_DO);
$stmt = $this->builder->buildAstDoWhileStatement($token->image);
$stmt = $this->parseStatementBody($stmt);
$this->consumeComments();
$this->consumeToken(self::T_WHILE);
$stmt->addChild($this->parseParenthesisExpression());
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a declare-statement.
*
* <code>
* -------------------------------
* declare(encoding='ISO-8859-1');
* -------------------------------
*
* -------------------
* declare(ticks=42) {
* // ...
* }
* -
*
* ------------------
* declare(ticks=42):
* // ...
* enddeclare;
* -----------
* </code>
*
* @return PHP_Depend_Code_ASTDeclareStatement
* @since 0.10.0
*/
private function parseDeclareStatement()
{
$this->tokenStack->push();
$this->consumeToken(self::T_DECLARE);
$stmt = $this->builder->buildAstDeclareStatement();
$stmt = $this->parseDeclareList($stmt);
$stmt = $this->parseStatementBody($stmt);
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a list of declare values. A declare list value always
* consists of a string token and a static scalar.
*
* @param PHP_Depend_Code_ASTDeclareStatement $stmt The declare statement that
* is the owner of this list.
*
* @return PHP_Depend_Code_ASTDeclareStatement
* @since 0.10.0
*/
private function parseDeclareList(PHP_Depend_Code_ASTDeclareStatement $stmt)
{
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
while (true) {
$this->consumeComments();
$name = $this->consumeToken(self::T_STRING)->image;
$this->consumeComments();
$this->consumeToken(self::T_EQUAL);
$this->consumeComments();
$value = $this->parseStaticValue();
$stmt->addValue($name, $value);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_COMMA) {
$this->consumeToken(self::T_COMMA);
continue;
}
break;
}
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $stmt;
}
/**
* This method parses a single return-statement node.
*
* @return PHP_Depend_Code_ASTReturnStatement
* @since 0.9.12
*/
private function parseReturnStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_RETURN);
$stmt = $this->builder->buildAstReturnStatement($token->image);
if (($expr = $this->parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a break-statement node.
*
* @return PHP_Depend_Code_ASTBreakStatement
* @since 0.9.12
*/
private function parseBreakStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_BREAK);
$stmt = $this->builder->buildAstBreakStatement($token->image);
if (($expr = $this->parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a continue-statement node.
*
* @return PHP_Depend_Code_ASTContinueStatement
* @since 0.9.12
*/
private function parseContinueStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_CONTINUE);
$stmt = $this->builder->buildAstContinueStatement($token->image);
if (($expr = $this->parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* This method parses a echo-statement node.
*
* @return PHP_Depend_Code_ASTEchoStatement
* @since 0.9.12
*/
private function parseEchoStatement()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_ECHO);
$stmt = $this->parseExpressionList(
$this->builder->buildAstEchoStatement($token->image)
);
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* Parses a simple parenthesis expression or a direct object access, which
* was introduced with PHP 5.4.0:
*
* <code>
* (new MyClass())->bar();
* </code>
*
* @return PHP_Depend_Code_ASTNode
* @since 1.0.0
*/
private function parseParenthesisExpressionOrPrimaryPrefix()
{
$expr = $this->parseParenthesisExpression();
$this->consumeComments();
if (self::T_OBJECT_OPERATOR === $this->tokenizer->peek()) {
return $this->parseMemberPrimaryPrefix($expr->getChild(0));
}
return $expr;
}
/**
* Parses any expression that is surrounded by an opening and a closing
* parenthesis
*
* @return PHP_Depend_Code_ASTExpression
* @since 0.9.8
*/
private function parseParenthesisExpression()
{
$this->tokenStack->push();
$this->consumeComments();
$expr = $this->builder->buildAstExpression();
$expr = $this->parseBraceExpression(
$expr,
$this->consumeToken(self::T_PARENTHESIS_OPEN),
self::T_PARENTHESIS_CLOSE
);
return $this->setNodePositionsAndReturn($expr);
}
/**
* This method parses a member primary prefix expression or a function
* postfix expression node.
*
* A member primary prefix can be a method call:
*
* <code>
* $object->foo();
*
* clazz::foo();
* </code>
*
* a property access:
*
* <code>
* $object->foo;
*
* clazz::$foo;
* </code>
*
* or a class constant access:
*
* <code>
* clazz::FOO;
* </code>
*
* A function postfix represents any kind of function call:
*
* <code>
* $function();
*
* func();
* </code>
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseMemberPrefixOrFunctionPostfix()
{
$this->tokenStack->push();
$this->tokenStack->push();
$qName = $this->parseQualifiedName();
// Remove comments
$this->consumeComments();
// Get next token type
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_DOUBLE_COLON:
$node = $this->builder->buildAstClassOrInterfaceReference($qName);
$node = $this->setNodePositionsAndReturn($node);
$node = $this->parseStaticMemberPrimaryPrefix($node);
break;
case self::T_PARENTHESIS_OPEN:
$node = $this->builder->buildAstIdentifier($qName);
$node = $this->setNodePositionsAndReturn($node);
$node = $this->parseFunctionPostfix($node);
break;
default:
$node = $this->builder->buildAstConstant($qName);
$node = $this->setNodePositionsAndReturn($node);
break;
}
return $this->setNodePositionsAndReturn($node);
}
/**
* This method will parse an optional function postfix.
*
* If the next available token is an opening parenthesis, this method will
* wrap the given <b>$node</b> with a {@link PHP_Depend_Code_ASTFunctionPostfix}
* node.
*
* @param PHP_Depend_Code_ASTNode $node The previously parsed node.
*
* @return PHP_Depend_Code_ASTNode The original input node or this node
* wrapped with a function postfix instance.
* @since 1.0.0
*/
private function parseOptionalFunctionPostfix(PHP_Depend_Code_ASTNode $node)
{
$this->consumeComments();
if (self::T_PARENTHESIS_OPEN === $this->tokenizer->peek()) {
return $this->parseFunctionPostfix($node);
}
return $node;
}
/**
* This method parses a function postfix expression. An object of type
* {@link PHP_Depend_Code_ASTFunctionPostfix} represents any valid php
* function call.
*
* This method will delegate the call to another method that returns a
* member primary prefix object when the function postfix expression is
* followed by an object operator.
*
* @param PHP_Depend_Code_ASTNode $node This node represents the function
* identifier. An identifier can be a static string, a variable, a
* compound variable or any other valid php function identifier.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseFunctionPostfix(PHP_Depend_Code_ASTNode $node)
{
$image = $this->extractPostfixImage($node);
$function = $this->builder->buildAstFunctionPostfix($image);
$function->addChild($node);
$function->addChild($this->parseArguments());
return $this->parseOptionalMemberPrimaryPrefix(
$this->parseOptionalIndexExpression($function)
);
}
/**
* This method parses a PHP version specific identifier for method and
* property postfix expressions.
*
* @return PHP_Depend_Code_ASTNode
* @since 1.0.0
*/
protected abstract function parsePostfixIdentifier();
/**
* This method parses an optional member primary expression. It will parse
* the primary expression when an object operator can be found at the actual
* token stream position. Otherwise this method simply returns the input
* {@link PHP_Depend_Code_ASTNode} instance.
*
* @param PHP_Depend_Code_ASTNode $node This node represents primary prefix
* left expression. It will be the first child of the parsed member
* primary expression.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseOptionalMemberPrimaryPrefix(PHP_Depend_Code_ASTNode $node)
{
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_OBJECT_OPERATOR) {
return $this->parseMemberPrimaryPrefix($node);
}
return $node;
}
/**
* This method parses a dynamic or object bound member primary expression.
* A member primary prefix can be a method call:
*
* <code>
* $object->foo();
* </code>
*
* or a property access:
*
* <code>
* $object->foo;
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The left node in the parsed member
* primary expression.
*
* @return PHP_Depend_Code_ASTMemberPrimaryPrefix
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseMemberPrimaryPrefix(PHP_Depend_Code_ASTNode $node)
{
// Consume double colon and optional comments
$token = $this->consumeToken(self::T_OBJECT_OPERATOR);
$prefix = $this->builder->buildAstMemberPrimaryPrefix($token->image);
$prefix->addChild($node);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_STRING:
$child = $this->parseIdentifier();
$child = $this->parseOptionalIndexExpression($child);
// TODO: Move this in a separate method
if ($child instanceof PHP_Depend_Code_ASTIndexExpression) {
$this->consumeComments();
if (self::T_PARENTHESIS_OPEN === $this->tokenizer->peek()) {
$prefix->addChild($this->parsePropertyPostfix($child));
return $this->parseOptionalFunctionPostfix($prefix);
}
}
break;
case self::T_CURLY_BRACE_OPEN:
$child = $this->parseCompoundExpression();
break;
default:
$child = $this->parseCompoundVariableOrVariableVariableOrVariable();
break;
}
$prefix->addChild(
$this->parseMethodOrPropertyPostfix(
$this->parseOptionalIndexExpression($child)
)
);
return $this->parseOptionalMemberPrimaryPrefix(
$this->parseOptionalIndexExpression($prefix)
);
}
/**
* This method parses an optional member primary expression. It will parse
* the primary expression when a double colon operator can be found at the
* actual token stream position. Otherwise this method simply returns the
* input {@link PHP_Depend_Code_ASTNode} instance.
*
* @param PHP_Depend_Code_ASTNode $node This node represents primary prefix
* left expression. It will be the first child of the parsed member
* primary expression.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 1.0.1
*/
private function parseOptionalStaticMemberPrimaryPrefix(
PHP_Depend_Code_ASTNode $node
) {
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_DOUBLE_COLON) {
return $this->parseStaticMemberPrimaryPrefix($node);
}
return $node;
}
/**
* This method parses a static member primary expression. The given node
* contains the used static class or interface identifier. A static member
* primary prefix can represent the following code expressions:
*
* A static method class:
*
* <code>
* Foo::bar();
* </code>
*
* a static property access:
*
* <code>
* Foo::$bar;
* </code>
*
* or a static constant access:
*
* <code>
* Foo::BAR;
* </code>
*
* @param PHP_Depend_Code_ASTNode $node The left node in the parsed member
* primary expression.
*
* @return PHP_Depend_Code_ASTMemberPrimaryPrefix
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseStaticMemberPrimaryPrefix(PHP_Depend_Code_ASTNode $node)
{
$token = $this->consumeToken(self::T_DOUBLE_COLON);
$prefix = $this->builder->buildAstMemberPrimaryPrefix($token->image);
$prefix->addChild($node);
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_STRING:
$postfix = $this->parseMethodOrConstantPostfix();
break;
default:
$postfix = $this->parseMethodOrPropertyPostfix(
$this->parsePostfixIdentifier()
);
break;
}
$prefix->addChild($postfix);
return $this->parseOptionalMemberPrimaryPrefix(
$this->parseOptionalIndexExpression($prefix)
);
}
/**
* This method parses a method- or constant-postfix expression. This expression
* will contain an identifier node as nested child.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseMethodOrConstantPostfix()
{
$this->tokenStack->push();
$node = $this->parseIdentifier();
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_PARENTHESIS_OPEN) {
$postfix = $this->parseMethodPostfix($node);
} else {
$postfix = $this->builder->buildAstConstantPostfix($node->getImage());
$postfix->addChild($node);
}
return $this->setNodePositionsAndReturn($postfix);
}
/**
* This method parses a method- or property-postfix expression. This expression
* will contain the given node as method or property identifier.
*
* @param PHP_Depend_Code_ASTNode $node The identifier for the parsed postfix
* expression node. This node will be the first child of the returned
* postfix node instance.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseMethodOrPropertyPostfix(PHP_Depend_Code_ASTNode $node)
{
// Strip optional comments
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_PARENTHESIS_OPEN:
$postfix = $this->parseMethodPostfix($node);
break;
default:
$postfix = $this->parsePropertyPostfix($node);
break;
}
return $this->parseOptionalMemberPrimaryPrefix($postfix);
}
/**
* Parses/Creates a property postfix node instance.
*
* @param PHP_Depend_Code_ASTNode $node Node that represents the image of
* the property postfix node.
*
* @return PHP_Depend_Code_ASTPropertyPostfix
* @since 0.10.2
*/
private function parsePropertyPostfix(PHP_Depend_Code_ASTNode $node)
{
$image = $this->extractPostfixImage($node);
$postfix = $this->builder->buildAstPropertyPostfix($image);
$postfix->addChild($node);
$postfix->setEndLine($node->getEndLine());
$postfix->setEndColumn($node->getEndColumn());
$postfix->setStartLine($node->getStartLine());
$postfix->setStartColumn($node->getStartColumn());
return $postfix;
}
/**
* This method will extract the image/name of the real property/variable
* that is wrapped by {@link PHP_Depend_Code_ASTIndexExpression} nodes. If
* the given node is now wrapped by index expressions, this method will
* return the image of the entire <b>$node</b>.
*
* @param PHP_Depend_Code_ASTNode $node The context node that may be wrapped
* by multiple array or string index expressions.
*
* @return string
* @since 1.0.0
*/
private function extractPostfixImage(PHP_Depend_Code_ASTNode $node)
{
while ($node instanceof PHP_Depend_Code_ASTIndexExpression) {
$node = $node->getChild(0);
}
return $node->getImage();
}
/**
* Parses a method postfix node instance.
*
* @param PHP_Depend_Code_ASTNode $node Node that represents the image of
* the method postfix node.
*
* @return PHP_Depend_Code_ASTMethodPostfix
* @since 1.0.0
*/
private function parseMethodPostfix(PHP_Depend_Code_ASTNode $node)
{
$args = $this->parseArguments();
$image = $this->extractPostfixImage($node);
$postfix = $this->builder->buildAstMethodPostfix($image);
$postfix->addChild($node);
$postfix->addChild($args);
$postfix->setEndLine($args->getEndLine());
$postfix->setEndColumn($args->getEndColumn());
$postfix->setStartLine($node->getStartLine());
$postfix->setStartColumn($node->getStartColumn());
return $this->parseOptionalMemberPrimaryPrefix($postfix);
}
/**
* This method parses the arguments passed to a function- or method-call.
*
* @return PHP_Depend_Code_ASTArguments
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @since 0.9.6
*/
private function parseArguments()
{
$this->consumeComments();
$this->tokenStack->push();
$arguments = $this->builder->buildAstArguments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$this->consumeComments();
if (self::T_PARENTHESIS_CLOSE !== $this->tokenizer->peek()) {
$arguments = $this->parseExpressionList($arguments);
}
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($arguments);
}
/**
* This method implements the parsing for various expression types like
* variables, object/static method. All these expressions are valid in
* several php language constructs like, isset, empty, unset etc.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.12
*/
private function parseVariableOrConstantOrPrimaryPrefix()
{
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_DOLLAR:
case self::T_VARIABLE:
$node = $this->parseVariableOrFunctionPostfixOrMemberPrimaryPrefix();
break;
case self::T_SELF:
$node = $this->parseConstantOrSelfMemberPrimaryPrefix();
break;
case self::T_PARENT:
$node = $this->parseConstantOrParentMemberPrimaryPrefix();
break;
case self::T_STATIC:
$node = $this->parseStaticVariableDeclarationOrMemberPrimaryPrefix();
break;
case self::T_STRING:
case self::T_BACKSLASH:
case self::T_NAMESPACE:
$node = $this->parseMemberPrefixOrFunctionPostfix();
break;
default:
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->sourceFile->getFileName()
);
}
return $node;
}
/**
* This method parses any type of variable, function postfix expressions or
* any kind of member primary prefix.
*
* This method expects that the actual token represents any kind of valid
* php variable: simple variable, compound variable or variable variable.
*
* It will parse a function postfix or member primary expression when this
* variable is followed by an object operator, double colon or opening
* parenthesis.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occur during the
* parsing process.
* @since 0.9.6
*/
private function parseVariableOrFunctionPostfixOrMemberPrimaryPrefix()
{
$this->tokenStack->push();
$variable = $this->parseCompoundVariableOrVariableVariableOrVariable();
$variable = $this->parseOptionalIndexExpression($variable);
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_DOUBLE_COLON:
$result = $this->parseStaticMemberPrimaryPrefix($variable);
break;
case self::T_OBJECT_OPERATOR:
$result = $this->parseMemberPrimaryPrefix($variable);
break;
case self::T_PARENTHESIS_OPEN:
$result = $this->parseFunctionPostfix($variable);
break;
default:
$result = $variable;
break;
}
return $this->setNodePositionsAndReturn($result);
}
/**
* Parses an assingment expression node.
*
* @param PHP_Depend_Code_ASTNode $left The left part of the assignment
* expression that will be parsed by this method.
*
* @return PHP_Depend_Code_ASTAssignmentExpression
* @since 0.9.12
*/
private function parseAssignmentExpression(PHP_Depend_Code_ASTNode $left)
{
$token = $this->consumeToken($this->tokenizer->peek());
$node = $this->builder->buildAstAssignmentExpression($token->image);
$node->addChild($left);
$node->setStartLine($left->getStartLine());
$node->setStartColumn($left->getStartColumn());
// TODO: Change this into a mandatory expression in later versions
if (($expr = $this->parseOptionalExpression()) != null) {
$node->addChild($expr);
$node->setEndLine($expr->getEndLine());
$node->setEndColumn($expr->getEndColumn());
} else {
$node->setEndLine($left->getEndLine());
$node->setEndColumn($left->getEndColumn());
}
return $node;
}
/**
* This method parses a {@link PHP_Depend_Code_ASTStaticReference} node.
*
* @param PHP_Depend_Token $token The "static" keyword token.
*
* @return PHP_Depend_Code_ASTStaticReference
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_InvalidStateException When the keyword static
* was used outside of a class or interface scope.
* @since 0.9.6
*/
private function parseStaticReference(PHP_Depend_Token $token)
{
// Strip optional comments
$this->consumeComments();
if ($this->classOrInterface === null) {
throw new PHP_Depend_Parser_InvalidStateException(
$token->startLine,
(string) $this->sourceFile,
'The keyword "static" was used outside of a class/method scope.'
);
}
$ref = $this->builder->buildAstStaticReference($this->classOrInterface);
$ref->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $ref;
}
/**
* This method parses a {@link PHP_Depend_Code_ASTSelfReference} node.
*
* @param PHP_Depend_Token $token The "self" keyword token.
*
* @return PHP_Depend_Code_ASTSelfReference
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_InvalidStateException When the keyword self
* was used outside of a class or interface scope.
* @since 0.9.6
*/
private function parseSelfReference(PHP_Depend_Token $token)
{
if ($this->classOrInterface === null) {
throw new PHP_Depend_Parser_InvalidStateException(
$token->startLine,
(string) $this->sourceFile,
'The keyword "self" was used outside of a class/method scope.'
);
}
$ref = $this->builder->buildAstSelfReference($this->classOrInterface);
$ref->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $ref;
}
/**
* Parses a simple PHP constant use and returns a corresponding node.
*
* @return PHP_Depend_Code_ASTNode
* @since 1.0.0
*/
private function parseConstant()
{
$this->tokenStack->push();
switch ($type = $this->tokenizer->peek()) {
case self::T_STRING:
// TODO: Separate node classes for magic constants
case self::T_DIR:
case self::T_FILE:
case self::T_LINE:
case self::T_NS_C:
case self::T_FUNC_C:
case self::T_CLASS_C:
case self::T_METHOD_C:
$token = $this->consumeToken($type);
$const = $this->builder->buildAstConstant($token->image);
break;
}
return $this->setNodePositionsAndReturn($const);
}
/**
* This method parses a {@link PHP_Depend_Code_ASTConstant} node or an
* instance of {@link PHP_Depend_Code_ASTSelfReference} as part of
* a {@link PHP_Depend_Code_MemberPrimaryPrefix} that contains the self
* reference as its first child when the self token is followed by a
* double colon token.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_InvalidStateException When the keyword self
* was used outside of a class or interface scope.
* @since 0.9.6
*/
private function parseConstantOrSelfMemberPrimaryPrefix()
{
// Read self token and strip optional comments
$token = $this->consumeToken(self::T_SELF);
$this->consumeComments();
if ($this->tokenizer->peek() == self::T_DOUBLE_COLON) {
return $this->parseStaticMemberPrimaryPrefix(
$this->parseSelfReference($token)
);
}
return $this->builder->buildAstConstant($token->image);
}
/**
* This method parses a {@link PHP_Depend_Code_ASTParentReference} node.
*
* @param PHP_Depend_Token $token The "self" keyword token.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_InvalidStateException When the keyword parent
* was used outside of a class or interface scope.
* @since 0.9.6
*/
private function parseParentReference(PHP_Depend_Token $token)
{
if ($this->classOrInterface === null) {
throw new PHP_Depend_Parser_InvalidStateException(
$token->startLine,
(string) $this->sourceFile,
'The keyword "parent" was used as type hint but the parameter ' .
'declaration is not in a class scope.'
);
}
$classReference = $this->classOrInterface->getParentClassReference();
if ($classReference === null) {
throw new PHP_Depend_Parser_InvalidStateException(
$token->startLine,
(string) $this->sourceFile,
sprintf(
'The keyword "parent" was used as type hint but the ' .
'class "%s" does not declare a parent.',
$this->classOrInterface->getName()
)
);
}
$ref = $this->builder->buildAstParentReference($classReference);
$ref->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $ref;
}
/**
* This method parses a {@link PHP_Depend_Code_ASTConstant} node or an
* instance of {@link PHP_Depend_Code_ASTParentReference} as part of
* a {@link PHP_Depend_Code_MemberPrimaryPrefix} that contains the parent
* reference as its first child when the self token is followed by a
* double colon token.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_InvalidStateException When the keyword parent
* was used outside of a class or interface scope.
* @since 0.9.6
*/
private function parseConstantOrParentMemberPrimaryPrefix()
{
// Consume parent token and strip optional comments
$token = $this->consumeToken(self::T_PARENT);
$this->consumeComments();
if ($this->tokenizer->peek() == self::T_DOUBLE_COLON) {
return $this->parseStaticMemberPrimaryPrefix(
$this->parseParentReference($token)
);
}
return $this->builder->buildAstConstant($token->image);
}
/**
* Parses a variable or any other valid member expression that is optionally
* prefixed with PHP's reference operator.
*
* <code>
* // -----------
* foreach ( $array as &$this->foo ) {}
* // -----------
*
* // ----------
* $foo = &$bar->baz;
* // ----------
* </code>
*
* @return PHP_Depend_Code_ASTUnaryExpression
* @since 0.9.18
*/
private function parseVariableOrMemberOptionalByReference()
{
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_BITWISE_AND) {
return $this->parseVariableOrMemberByReference();
}
return $this->parseVariableOrConstantOrPrimaryPrefix();
}
/**
* Parses a variable or any other valid member expression that is prefixed
* with PHP's reference operator.
*
* <code>
* // -----------
* foreach ( $array as &$this->foo ) {}
* // -----------
*
* // ----------
* $foo = &$bar->baz;
* // ----------
* </code>
*
* @return PHP_Depend_Code_ASTUnaryExpression
* @since 0.9.18
*/
private function parseVariableOrMemberByReference()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_BITWISE_AND);
$this->consumeComments();
$expr = $this->builder->buildAstUnaryExpression($token->image);
$expr->addChild($this->parseVariableOrConstantOrPrimaryPrefix());
return $this->setNodePositionsAndReturn($expr);
}
/**
* This method parses a simple PHP variable.
*
* @return PHP_Depend_Code_ASTVariable
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
private function parseVariable()
{
$token = $this->consumeToken(self::T_VARIABLE);
$variable = $this->builder->buildAstVariable($token->image);
$variable->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $variable;
}
/**
* This method parses a comma separated list of valid php variables and/or
* properties and adds them to the given node instance.
*
* @param PHP_Depend_Code_ASTNode $node The context parent node.
*
* @return PHP_Depend_Code_ASTNode The prepared entire node.
* @since 0.9.12
*/
private function parseVariableList(PHP_Depend_Code_ASTNode $node)
{
$this->consumeComments();
while ($this->tokenizer->peek() !== self::T_EOF) {
$node->addChild($this->parseVariableOrConstantOrPrimaryPrefix());
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_COMMA) {
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
} else {
break;
}
}
return $node;
}
/**
* This method is a decision point between the different variable types
* availanle in PHP. It peeks the next token and then decides whether it is
* a regular variable or when the next token is of type <b>T_DOLLAR</b> a
* compound- or variable-variable.
*
* <code>
* ----
* $foo;
* ----
*
* -----
* $$foo;
* -----
*
* ------
* ${FOO};
* ------
* </code>
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
protected function parseCompoundVariableOrVariableVariableOrVariable()
{
if ($this->tokenizer->peek() == self::T_DOLLAR) {
return $this->parseCompoundVariableOrVariableVariable();
}
return $this->parseVariable();
}
/**
* Parses a PHP compound variable or a simple literal node.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.19
*/
private function parseCompoundVariableOrLiteral()
{
$this->tokenStack->push();
// Read the dollar token
$token = $this->consumeToken(self::T_DOLLAR);
$this->consumeComments();
// Get next token type
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_CURLY_BRACE_OPEN:
$variable = $this->builder->buildAstCompoundVariable($token->image);
$variable->addChild($this->parseCompoundExpression());
break;
default:
$variable = $this->builder->buildAstLiteral($token->image);
break;
}
return $this->setNodePositionsAndReturn($variable);
}
/**
* This method implements a decision point between compound-variables and
* variable-variable. It expects that the next token in the token-stream is
* of type <b>T_DOLLAR</b> and removes it from the stream. Then this method
* peeks the next available token when it is of type <b>T_CURLY_BRACE_OPEN</b>
* this is compound variable, otherwise it can be a variable-variable or a
* compound-variable.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
private function parseCompoundVariableOrVariableVariable()
{
$this->tokenStack->push();
// Read the dollar token
$token = $this->consumeToken(self::T_DOLLAR);
$this->consumeComments();
// Get next token type
$tokenType = $this->tokenizer->peek();
// T_DOLLAR|T_VARIABLE === Variable variable,
// T_CURLY_BRACE_OPEN === Compound variable
switch ($tokenType) {
case self::T_DOLLAR:
case self::T_VARIABLE:
$variable = $this->builder->buildAstVariableVariable($token->image);
$variable->addChild(
$this->parseCompoundVariableOrVariableVariableOrVariable()
);
break;
default:
$variable = $this->parseCompoundVariable($token);
break;
}
return $this->setNodePositionsAndReturn($variable);
}
/**
* This method parses a compound variable like:
*
* <code>
* // ----------------
* return ${'Foo' . 'Bar'};
* // ----------------
* </code>
*
* @param PHP_Depend_Token $token The dollar token.
*
* @return PHP_Depend_Code_ASTCompoundVariable
* @since 0.10.0
*/
private function parseCompoundVariable(PHP_Depend_Token $token)
{
return $this->parseBraceExpression(
$this->builder->buildAstCompoundVariable($token->image),
$this->consumeToken(self::T_CURLY_BRACE_OPEN),
self::T_CURLY_BRACE_CLOSE
);
}
/**
* This method parses a compound expression like:
*
* <code>
* // ------ ------
* $foo = "{$bar}, {$baz}\n";
* // ------ ------
* </code>
*
* or a simple literal token:
*
* <code>
* // -
* $foo = "{{$bar}, {$baz}\n";
* // -
* </code>
*
* @return PHP_Depend_Code_NodeI
* @since 0.9.10
*/
private function parseCompoundExpressionOrLiteral()
{
$token = $this->consumeToken(self::T_CURLY_BRACE_OPEN);
$this->consumeComments();
switch ($this->tokenizer->peek()) {
case self::T_DOLLAR:
case self::T_VARIABLE:
return $this->parseBraceExpression(
$this->builder->buildAstCompoundExpression(),
$token,
self::T_CURLY_BRACE_CLOSE
);
}
$literal = $this->builder->buildAstLiteral($token->image);
$literal->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $literal;
}
/**
* This method parses a compound expression node.
*
* <code>
* ------------------
* {'_' . foo . $bar}
* ------------------
* </code>
*
* @return PHP_Depend_Code_ASTCompoundExpression
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
protected function parseCompoundExpression()
{
$this->consumeComments();
return $this->parseBraceExpression(
$this->builder->buildAstCompoundExpression(),
$this->consumeToken(self::T_CURLY_BRACE_OPEN),
self::T_CURLY_BRACE_CLOSE
);
}
/**
* Parses a static identifier expression, as it is used for method and
* function names.
*
* @return PHP_Depend_Code_ASTIdentifier
* @since 0.9.12
*/
protected function parseIdentifier()
{
$token = $this->consumeToken(self::T_STRING);
$node = $this->builder->buildAstIdentifier($token->image);
$node->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $node;
}
/**
* This method parses a {@link PHP_Depend_Code_ASTLiteral} node or an
* instance of {@link PHP_Depend_Code_ASTString} that represents a string
* in double quotes or surrounded by backticks.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_UnexpectedTokenException When this method
* reaches the end of the token stream without terminating the
* literal string.
*/
private function parseLiteralOrString()
{
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_NULL:
case self::T_TRUE:
case self::T_FALSE:
case self::T_DNUMBER:
case self::T_CONSTANT_ENCAPSED_STRING:
$token = $this->consumeToken($tokenType);
$literal = $this->builder->buildAstLiteral($token->image);
$literal->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $literal;
case self::T_LNUMBER:
return $this->parseIntegerNumber();
default:
return $this->parseString($tokenType);
}
}
/**
* Parses an integer value.
*
* @return PHP_Depend_Code_ASTLiteral
* @since 1.0.0
*/
protected abstract function parseIntegerNumber();
/**
* Parses an array structure.
*
* @return PHP_Depend_Code_ASTArray
* @since 1.0.0
*/
private function doParseArray($static = false)
{
$this->tokenStack->push();
return $this->setNodePositionsAndReturn(
$this->parseArray(
$this->builder->buildAstArray(),
$static
)
);
}
/**
* Tests if the next token is a valid array start delimiter in the supported
* PHP version.
*
* @return boolean
* @since 1.0.0
*/
protected abstract function isArrayStartDelimiter();
/**
* Parses a php array declaration.
*
* @param PHP_Depend_Code_ASTArray $array
* @param boolean $static
*
* @return PHP_Depend_Code_ASTArray
* @since 1.0.0
*/
protected abstract function parseArray(PHP_Depend_Code_ASTArray $array, $static = false);
/**
* Parses all elements in an array.
*
* @param PHP_Depend_Code_ASTArray $array
* @param integer $endDelimiter
* @param boolean $static
*
* @return PHP_Depend_Code_ASTArray
* @since 1.0.0
*/
protected function parseArrayElements(
PHP_Depend_Code_ASTArray $array,
$endDelimiter,
$static = false
) {
$this->consumeComments();
while ($endDelimiter !== $this->tokenizer->peek()) {
$array->addChild($this->parseArrayElement($static));
$this->consumeComments();
if (self::T_COMMA === $this->tokenizer->peek()) {
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
}
}
return $array;
}
/**
* Parses a single array element.
*
* An array element can have a simple value, a key/value pair, a value by
* reference or a key/value pair with a referenced value.
*
* @param boolean $static
* @return PHP_Depend_Code_ASTArrayElement
* @since 1.0.0
*/
protected function parseArrayElement($static = false)
{
$this->consumeComments();
$this->tokenStack->push();
$element = $this->builder->buildAstArrayElement();
if ($this->parseOptionalByReference()) {
if ($static) {
$tokens = $this->tokenStack->pop();
throw new PHP_Depend_Parser_UnexpectedTokenException(
end($tokens),
$this->sourceFile->getFileName()
);
}
$element->setByReference();
}
$this->consumeComments();
if ($this->isKeyword($this->tokenizer->peek())) {
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->sourceFile->getFileName()
);
}
$element->addChild($this->parseExpression());
$this->consumeComments();
if (self::T_DOUBLE_ARROW === $this->tokenizer->peek()) {
$this->consumeToken(self::T_DOUBLE_ARROW);
$this->consumeComments();
if ($this->parseOptionalByReference()) {
$element->setByReference();
}
$element->addChild($this->parseExpression());
}
return $this->setNodePositionsAndReturn($element);
}
/**
* Parses a here- or nowdoc string instance.
*
* @return PHP_Depend_Code_ASTHeredoc
* @since 0.9.12
*/
protected function parseHeredoc()
{
$this->tokenStack->push();
$this->consumeToken(self::T_START_HEREDOC);
$heredoc = $this->builder->buildAstHeredoc();
$this->parseStringExpressions($heredoc, self::T_END_HEREDOC);
$token = $this->consumeToken(self::T_END_HEREDOC);
$heredoc->setDelimiter($token->image);
return $this->setNodePositionsAndReturn($heredoc);
}
/**
* Parses a simple string sequence between two tokens of the same type.
*
* @param integer $tokenType The start/stop token type.
*
* @return string
* @since 0.9.10
*/
private function parseStringSequence($tokenType)
{
$type = $tokenType;
$string = '';
do {
$string .= $this->consumeToken($type)->image;
$type = $this->tokenizer->peek();
} while ($type != $tokenType && $type != self::T_EOF);
return $string . $this->consumeToken($tokenType)->image;
}
/**
* This method parses a php string with all possible embedded expressions.
*
* <code>
* $string = "Manuel $Pichler <{$email}>";
*
* // PHP_Depend_Code_ASTSTring
* // |-- ASTLiteral - "Manuel ")
* // |-- ASTVariable - $Pichler
* // |-- ASTLiteral - " <"
* // |-- ASTCompoundExpression - {...}
* // | |-- ASTVariable - $email
* // |-- ASTLiteral - ">"
* </code>
*
* @param integer $delimiterType The start/stop token type.
*
* @return PHP_Depend_Code_ASTString
* @throws PHP_Depend_Parser_UnexpectedTokenException When this method
* reaches the end of the token stream without terminating the
* literal string.
* @since 0.9.10
*/
private function parseString($delimiterType)
{
$token = $this->consumeToken($delimiterType);
$string = $this->builder->buildAstString();
$string->setStartLine($token->startLine);
$string->setStartColumn($token->startColumn);
$this->parseStringExpressions($string, $delimiterType);
$token = $this->consumeToken($delimiterType);
$string->setEndLine($token->endLine);
$string->setEndColumn($token->endColumn);
return $string;
}
/**
* This method parses the contents of a string or here-/now-doc node. It
* will not consume the given stop token, so it is up to the calling method
* to consume the stop token. The return value of this method is the prepared
* input string node.
*
* @param PHP_Depend_Code_ASTNode $node The parent string or nowdoc node.
* @param integer $stopToken The stop token type.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.12
*/
private function parseStringExpressions(
PHP_Depend_Code_ASTNode $node,
$stopToken
) {
while (($tokenType = $this->tokenizer->peek()) != self::T_EOF) {
switch ($tokenType) {
case $stopToken:
break 2;
case self::T_BACKSLASH:
$node->addChild($this->parseEscapedAstLiteralString());
break;
case self::T_DOLLAR:
$node->addChild($this->parseCompoundVariableOrLiteral());
break;
case self::T_VARIABLE:
$node->addChild($this->parseVariable());
break;
case self::T_CURLY_BRACE_OPEN:
$node->addChild($this->parseCompoundExpressionOrLiteral());
break;
default:
$node->addChild($this->parseLiteral());
break;
}
}
return $node;
}
/**
* This method parses an escaped sequence of literal tokens.
*
* @return PHP_Depend_Code_ASTLiteral
* @since 0.9.10
*/
private function parseEscapedAstLiteralString()
{
$this->tokenStack->push();
$image = $this->consumeToken(self::T_BACKSLASH)->image;
$escape = true;
$tokenType = $this->tokenizer->peek();
while ($tokenType != self::T_EOF) {
if ($tokenType === self::T_BACKSLASH) {
$escape != $escape;
$image .= $this->consumeToken(self::T_BACKSLASH)->image;
$tokenType = $this->tokenizer->peek();
continue;
}
if ($escape) {
$image .= $this->consumeToken($tokenType)->image;
break;
}
}
return $this->setNodePositionsAndReturn(
$this->builder->buildAstLiteral($image)
);
}
/**
* This method parses a simple literal and configures the position
* properties.
*
* @return PHP_Depend_Code_ASTLiteral
* @since 0.9.10
*/
protected function parseLiteral()
{
$token = $this->consumeToken($this->tokenizer->peek());
$node = $this->builder->buildAstLiteral($token->image);
$node->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $node;
}
/**
* Extracts all dependencies from a callable signature.
*
* @return PHP_Depend_Code_ASTFormalParameters
* @since 0.9.5
*/
private function parseFormalParameters()
{
$this->consumeComments();
$this->tokenStack->push();
$formalParameters = $this->builder->buildAstFormalParameters();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
// Check for function without parameters
if ($tokenType === self::T_PARENTHESIS_CLOSE) {
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($formalParameters);
}
while ($tokenType !== self::T_EOF) {
$formalParameters->addChild(
$this->parseFormalParameterOrTypeHintOrByReference()
);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
// Check for following parameter
if ($tokenType !== self::T_COMMA) {
break;
}
$this->consumeToken(self::T_COMMA);
}
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $this->setNodePositionsAndReturn($formalParameters);
}
/**
* This method parses a formal parameter in all it's variations.
*
* <code>
* // ------------
* function traverse(Iterator $it) {}
* // ------------
*
* // ---------
* function traverse(array $ar) {}
* // ---------
*
* // ---
* function traverse(&$x) {}
* // ---
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameterOrTypeHintOrByReference()
{
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
$this->tokenStack->push();
switch ($tokenType) {
case self::T_ARRAY:
$parameter = $this->parseFormalParameterAndArrayTypeHint();
break;
case ($this->isFormalParameterTypeHint($tokenType)):
$parameter = $this->parseFormalParameterAndTypeHint();
break;
case self::T_SELF:
$parameter = $this->parseFormalParameterAndSelfTypeHint();
break;
case self::T_PARENT:
$parameter = $this->parseFormalParameterAndParentTypeHint();
break;
case self::T_BITWISE_AND:
$parameter = $this->parseFormalParameterAndByReference();
break;
default:
$parameter = $this->parseFormalParameter();
break;
}
return $this->setNodePositionsAndReturn($parameter);
}
/**
* This method parses a formal parameter that has an array type hint.
*
* <code>
* // ---------
* function traverse(array $ar) {}
* // ---------
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameterAndArrayTypeHint()
{
$token = $this->consumeToken(self::T_ARRAY);
$node = $this->builder->buildAstTypeArray();
$node->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
$parameter = $this->parseFormalParameterOrByReference();
$parameter->prependChild($node);
return $parameter;
}
/**
* This method parses a formal parameter that has a regular class type hint.
*
* <code>
* // ------------
* function traverse(Iterator $it) {}
* // ------------
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameterAndTypeHint()
{
$this->tokenStack->push();
$classReference = $this->setNodePositionsAndReturn(
$this->parseFormalParameterTypeHint()
);
$parameter = $this->parseFormalParameterOrByReference();
$parameter->addChild($classReference);
return $parameter;
}
/**
* This method will parse a formal parameter that has the keyword parent as
* parameter type hint.
*
* <code>
* class Foo extends Bar
* {
* // ---------
* public function test(parent $o) {}
* // ---------
* }
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @throws PHP_Depend_Parser_InvalidStateException When this type hint is
* used outside the scope of a class. When this type hint is used
* for a class that has no parent.
* @since 0.9.6
*/
private function parseFormalParameterAndParentTypeHint()
{
$token = $this->consumeToken(self::T_PARENT);
$reference = $this->parseParentReference($token);
$parameter = $this->parseFormalParameterOrByReference();
$parameter->prependChild($reference);
return $parameter;
}
/**
* This method will parse a formal parameter that has the keyword self as
* parameter type hint.
*
* <code>
* class Foo
* {
* // -------
* public function test(self $o) {}
* // -------
* }
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameterAndSelfTypeHint()
{
$token = $this->consumeToken(self::T_SELF);
$self = $this->builder->buildAstSelfReference($this->classOrInterface);
$self->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
$parameter = $this->parseFormalParameterOrByReference();
$parameter->addChild($self);
return $parameter;
}
/**
* This method will parse a formal parameter that can optionally be passed
* by reference.
*
* <code>
* // --- -------
* function foo(array &$x, $y = 42) {}
* // --- -------
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
protected function parseFormalParameterOrByReference()
{
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_BITWISE_AND) {
return $this->parseFormalParameterAndByReference();
}
return $this->parseFormalParameter();
}
/**
* This method will parse a formal parameter that is passed by reference.
*
* <code>
* // --- --------
* function foo(array &$x, &$y = 42) {}
* // --- --------
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameterAndByReference()
{
$this->consumeToken(self::T_BITWISE_AND);
$this->consumeComments();
$parameter = $this->parseFormalParameter();
$parameter->setPassedByReference();
return $parameter;
}
/**
* This method will parse a formal parameter. A formal parameter is at least
* a variable name, but can also contain a default parameter value.
*
* <code>
* // -- -------
* function foo(Bar $x, $y = 42) {}
* // -- -------
* </code>
*
* @return PHP_Depend_Code_ASTFormalParameter
* @since 0.9.6
*/
private function parseFormalParameter()
{
$parameter = $this->builder->buildAstFormalParameter();
$parameter->addChild($this->parseVariableDeclarator());
return $parameter;
}
/**
* Tests if the given token type is a valid formal parameter in the supported
* PHP version.
*
* @param integer $tokenType Numerical token identifier.
*
* @return boolean
* @since 1.0.0
*/
protected abstract function isFormalParameterTypeHint($tokenType);
/**
* Parses a formal parameter type hint that is valid in the supported PHP
* version.
*
* @return PHP_Depend_Code_ASTNode
* @since 1.0.0
*/
protected abstract function parseFormalParameterTypeHint();
/**
* Extracts all dependencies from a callable body.
*
* @return PHP_Depend_Code_ASTScope
* @since 0.9.12
*/
private function parseScope()
{
$scope = $this->builder->buildAstScope();
$this->tokenStack->push();
$this->consumeComments();
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
while (($stmt = $this->parseOptionalStatement()) !== null) {
// TODO: Remove if-statement once, we have translated functions and
// closures into ast-nodes
if ($stmt instanceof PHP_Depend_Code_ASTNode) {
$scope->addChild($stmt);
}
}
$this->consumeComments();
$this->consumeToken(self::T_CURLY_BRACE_CLOSE);
return $this->setNodePositionsAndReturn($scope);
}
/**
* Parse a statement.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_UnexpectedTokenException
* @since 1.0.0
*/
private function parseStatement()
{
if (null === ($stmt = $this->parseOptionalStatement())) {
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->sourceFile->getFileName()
);
}
return $stmt;
}
/**
* Parses an optional statement or returns <b>null</b>.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.8
*/
private function parseOptionalStatement()
{
$tokenType = $this->tokenizer->peek();
switch ($tokenType) {
case self::T_ECHO:
return $this->parseEchoStatement();
case self::T_SWITCH:
return $this->parseSwitchStatement();
case self::T_TRY:
return $this->parseTryStatement();
case self::T_THROW:
return $this->parseThrowStatement();
case self::T_IF:
return $this->parseIfStatement();
case self::T_FOR:
return $this->parseForStatement();
case self::T_FOREACH:
return $this->parseForeachStatement();
case self::T_DO:
return $this->parseDoWhileStatement();
case self::T_WHILE:
return $this->parseWhileStatement();
case self::T_RETURN:
return $this->parseReturnStatement();
case self::T_BREAK:
return $this->parseBreakStatement();
case self::T_CONTINUE:
return $this->parseContinueStatement();
case self::T_GOTO:
return $this->parseGotoStatement();
case self::T_GLOBAL:
return $this->parseGlobalStatement();
case self::T_UNSET:
return $this->parseUnsetStatement();
case self::T_STRING:
if ($this->tokenizer->peekNext() === self::T_COLON) {
return $this->parseLabelStatement();
}
break;
case self::T_CONST:
return $this->parseConstantDefinition();
case self::T_FUNCTION:
return $this->parseFunctionOrClosureDeclaration();
case self::T_COMMENT:
return $this->parseCommentWithOptionalInlineClassOrInterfaceReference();
case self::T_DOC_COMMENT:
return $this->builder->buildAstComment(
$this->consumeToken(self::T_DOC_COMMENT)->image
);
case self::T_CURLY_BRACE_OPEN:
return $this->parseRegularScope();
case self::T_DECLARE:
return $this->parseDeclareStatement();
case self::T_ELSE:
case self::T_ENDIF:
case self::T_ELSEIF:
case self::T_ENDFOR:
case self::T_ENDWHILE:
case self::T_ENDSWITCH:
case self::T_ENDDECLARE:
case self::T_ENDFOREACH:
case self::T_CURLY_BRACE_CLOSE:
return null;
case self::T_DECLARE:
return $this->parseDeclareStatement();
case self::T_CLOSE_TAG:
if (($tokenType = $this->parseNonePhpCode()) === self::T_EOF) {
return null;
}
return $this->parseOptionalStatement();
case self::T_TRAIT:
$package = $this->getNamespaceOrPackage();
$package->addType($trait = $this->parseTraitDeclaration());
$this->builder->restoreTrait($trait);
$this->sourceFile->addChild($trait);
return $trait;
case self::T_INTERFACE:
$package = $this->getNamespaceOrPackage();
$package->addType($interface = $this->parseInterfaceDeclaration());
$this->builder->restoreInterface($interface);
$this->sourceFile->addChild($interface);
return $interface;
case self::T_CLASS:
case self::T_FINAL:
case self::T_ABSTRACT:
$package = $this->getNamespaceOrPackage();
$package->addType($class = $this->parseClassDeclaration());
$this->builder->restoreClass($class);
$this->sourceFile->addChild($class);
return $class;
}
$this->tokenStack->push();
$stmt = $this->builder->buildAstStatement();
if (($expr = $this->parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->parseStatementTermination();
return $this->setNodePositionsAndReturn($stmt);
}
/**
* Parses a sequence of none php code tokens and returns the token type of
* the next token.
*
* @return integer
* @since 0.9.12
*/
private function parseNonePhpCode()
{
$this->consumeToken(self::T_CLOSE_TAG);
$this->tokenStack->push();
while (($tokenType = $this->tokenizer->peek()) !== self::T_EOF) {
switch ($tokenType) {
case self::T_OPEN_TAG:
case self::T_OPEN_TAG_WITH_ECHO:
$this->consumeToken($tokenType);
$tokenType = $this->tokenizer->peek();
break 2;
default:
$this->consumeToken($tokenType);
break;
}
}
$this->tokenStack->pop();
return $tokenType;
}
/**
* Parses a comment and optionally an embedded class or interface type
* annotation.
*
* @return PHP_Depend_Code_ASTComment
* @since 0.9.8
*/
private function parseCommentWithOptionalInlineClassOrInterfaceReference()
{
$token = $this->consumeToken(self::T_COMMENT);
$comment = $this->builder->buildAstComment($token->image);
if (preg_match(self::REGEXP_INLINE_TYPE, $token->image, $match)) {
$comment->addChild(
$this->builder->buildAstClassOrInterfaceReference($match[1])
);
}
$comment->configureLinesAndColumns(
$token->startLine,
$token->endLine,
$token->startColumn,
$token->endColumn
);
return $comment;
}
/**
* Parses an optional set of bound closure variables.
*
* @param PHP_Depend_Code_ASTClosure $closure The context closure instance.
*
* @return PHP_Depend_Code_ASTClosure
* @since 1.0.0
*/
private function parseOptionalBoundVariables(
PHP_Depend_Code_ASTClosure $closure
) {
$this->consumeComments();
if (self::T_USE === $this->tokenizer->peek()) {
return $this->parseBoundVariables($closure);
}
return $closure;
}
/**
* Parses a list of bound closure variables.
*
* @param PHP_Depend_Code_ASTClosure $closure The parent closure instance.
*
* @return PHP_Depend_Code_ASTClosure
* @since 0.9.5
*/
private function parseBoundVariables(PHP_Depend_Code_ASTClosure $closure)
{
$this->consumeToken(self::T_USE);
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_OPEN);
while ($this->tokenizer->peek() !== self::T_EOF) {
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_BITWISE_AND) {
$this->consumeToken(self::T_BITWISE_AND);
$this->consumeComments();
}
$this->consumeToken(self::T_VARIABLE);
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_COMMA) {
$this->consumeToken(self::T_COMMA);
continue;
}
break;
}
$this->consumeComments();
$this->consumeToken(self::T_PARENTHESIS_CLOSE);
return $closure;
}
/**
* Parses a php class/method name chain.
*
* <code>
* PHP\Depend\Parser::parse();
* </code>
*
* @return string
* @link http://php.net/manual/en/language.namespaces.importing.php
*/
protected function parseQualifiedName()
{
$fragments = $this->parseQualifiedNameRaw();
// Check for fully qualified name
if ($fragments[0] === '\\') {
return join('', $fragments);
}
// Search for an use alias
$mapsTo = $this->useSymbolTable->lookup($fragments[0]);
if ($mapsTo !== null) {
// Remove alias and add real namespace
array_shift($fragments);
array_unshift($fragments, $mapsTo);
} else if ($this->namespaceName !== null
&& $this->namespacePrefixReplaced === false
) {
// Prepend current namespace
array_unshift($fragments, $this->namespaceName, '\\');
}
return join('', $fragments);
}
/**
* This method parses a qualified PHP 5.3 class, interface and namespace
* identifier and returns the collected tokens as a string array.
*
* @return array(string)
* @since 0.9.5
*/
private function parseQualifiedNameRaw()
{
// Reset namespace prefix flag
$this->namespacePrefixReplaced = false;
// Consume comments and fetch first token type
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
$qualifiedName = array();
if ($tokenType === self::T_NAMESPACE) {
// Consume namespace keyword
$this->consumeToken(self::T_NAMESPACE);
$this->consumeComments();
// Add current namespace as first token
$qualifiedName = array((string) $this->namespaceName);
// Set prefixed flag to true
$this->namespacePrefixReplaced = true;
} else if ($this->isClassName($tokenType)) {
$qualifiedName[] = $this->parseClassName();
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
// Stop here for simple identifier
if ($tokenType !== self::T_BACKSLASH) {
return $qualifiedName;
}
}
do {
// Next token must be a namespace separator
$this->consumeToken(self::T_BACKSLASH);
$this->consumeComments();
// Append to qualified name
$qualifiedName[] = '\\';
$qualifiedName[] = $this->parseClassName();
$this->consumeComments();
// Get next token type
$tokenType = $this->tokenizer->peek();
} while ($tokenType === self::T_BACKSLASH);
return $qualifiedName;
}
/**
* This method parses a PHP 5.3 namespace declaration.
*
* @return void
* @since 0.9.5
*/
private function parseNamespaceDeclaration()
{
// Consume namespace keyword and strip optional comments
$this->consumeToken(self::T_NAMESPACE);
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
// Search for a namespace identifier
if ($tokenType === self::T_STRING) {
// Reset namespace property
$this->namespaceName = null;
$qualifiedName = $this->parseQualifiedName();
$this->consumeComments();
if ($this->tokenizer->peek() === self::T_CURLY_BRACE_OPEN) {
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
} else {
$this->consumeToken(self::T_SEMICOLON);
}
// Create a package for this namespace
$this->namespaceName = $qualifiedName;
$this->useSymbolTable->resetScope();
} else if ($tokenType === self::T_BACKSLASH) {
// Same namespace reference, something like:
// new namespace\Foo();
// or:
// $x = namespace\foo::bar();
// Now parse a qualified name
$this->parseQualifiedNameRaw();
} else {
// Consume opening curly brace
$this->consumeToken(self::T_CURLY_BRACE_OPEN);
// Create a package for this namespace
$this->namespaceName = '';
$this->useSymbolTable->resetScope();
}
$this->reset();
}
/**
* This method parses a list of PHP 5.3 use declarations and adds a mapping
* between short name and full qualified name to the use symbol table.
*
* <code>
* use \foo\bar as fb,
* \foobar\Bar;
* </code>
*
* @return void
* @since 0.9.5
*/
private function parseUseDeclarations()
{
// Consume use keyword
$this->consumeToken(self::T_USE);
$this->consumeComments();
// Parse all use declarations
$this->parseUseDeclaration();
$this->consumeComments();
// Consume closing semicolon
$this->consumeToken(self::T_SEMICOLON);
// Reset any previous state
$this->reset();
}
/**
* This method parses a single use declaration and adds a mapping between
* short name and full qualified name to the use symbol table.
*
* @return void
* @since 0.9.5
*/
private function parseUseDeclaration()
{
$fragments = $this->parseQualifiedNameRaw();
$this->consumeComments();
// Add leading backslash, because aliases must be full qualified
// http://php.net/manual/en/language.namespaces.importing.php
if ($fragments[0] !== '\\') {
array_unshift($fragments, '\\');
}
if ($this->tokenizer->peek() === self::T_AS) {
$this->consumeToken(self::T_AS);
$this->consumeComments();
$image = $this->consumeToken(self::T_STRING)->image;
$this->consumeComments();
} else {
$image = end($fragments);
}
// Add mapping between image and qualified name to symbol table
$this->useSymbolTable->add($image, join('', $fragments));
// Check for a following use declaration
if ($this->tokenizer->peek() === self::T_COMMA) {
// Consume comma token and comments
$this->consumeToken(self::T_COMMA);
$this->consumeComments();
$this->parseUseDeclaration();
}
}
/**
* Parses a single constant definition with one or more constant declarators.
*
* <code>
* class Foo
* {
* // ------------------------
* const FOO = 42, BAR = 23;
* // ------------------------
* }
* </code>
*
* @return PHP_Depend_Code_ASTConstantDefinition
* @since 0.9.6
*/
private function parseConstantDefinition()
{
$this->tokenStack->push();
$token = $this->consumeToken(self::T_CONST);
$definition = $this->builder->buildAstConstantDefinition($token->image);
$definition->setComment($this->docComment);
do {
$definition->addChild($this->parseConstantDeclarator());
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_SEMICOLON) {
break;
}
$this->consumeToken(self::T_COMMA);
} while ($tokenType !== self::T_EOF);
$definition = $this->setNodePositionsAndReturn($definition);
$this->consumeToken(self::T_SEMICOLON);
return $definition;
}
/**
* Parses a single constant declarator.
*
* <code>
* class Foo
* {
* // --------
* const BAR = 42;
* // --------
* }
* </code>
*
* Or in a comma separated constant defintion:
*
* <code>
* class Foo
* {
* // --------
* const BAR = 42,
* // --------
*
* // --------------
* const BAZ = 'Foobar',
* // --------------
*
* // ----------
* const FOO = 3.14;
* // ----------
* }
* </code>
*
* @return PHP_Depend_Code_ASTConstantDeclarator
* @since 0.9.6
*/
private function parseConstantDeclarator()
{
// Remove leading comments and create a new token stack
$this->consumeComments();
$this->tokenStack->push();
$token = $this->consumeToken(self::T_STRING);
$this->consumeComments();
$this->consumeToken(self::T_EQUAL);
$declarator = $this->builder->buildAstConstantDeclarator($token->image);
$declarator->setValue($this->parseStaticValue());
return $this->setNodePositionsAndReturn($declarator);
}
/**
* This method parses a static variable declaration list, a member primary
* prefix invoked in the static context of a class or it parses a static
* closure declaration.
*
* Static variable:
* <code>
* function foo() {
* // ------------------------------
* static $foo, $bar, $baz = null;
* // ------------------------------
* }
* </code>
*
* Static method invocation:
* <code>
* class Foo {
* public function baz() {
* // ----------------
* static::foobar();
* // ----------------
* }
* public function foobar() {}
* }
*
* class Bar extends Foo {
* public function foobar() {}
* }
* </code>
*
* Static closure declaration:
* <code>
* $closure = static function($x, $y) {
* return ($x * $y);
* };
* </code>
*
* @return PHP_Depend_Code_ASTConstant
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
private function parseStaticVariableDeclarationOrMemberPrimaryPrefix()
{
$this->tokenStack->push();
// Consume static token and strip optional comments
$token = $this->consumeToken(self::T_STATIC);
$this->consumeComments();
// Fetch next token type
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_PARENTHESIS_OPEN
|| $tokenType === self::T_DOUBLE_COLON
) {
$static = $this->parseStaticReference($token);
$prefix = $this->parseStaticMemberPrimaryPrefix($static);
return $this->setNodePositionsAndReturn($prefix);
} else if ($tokenType === self::T_FUNCTION) {
$closure = $this->parseClosureDeclaration();
$closure->setStatic(true);
return $this->setNodePositionsAndReturn($closure);
}
$declaration = $this->parseStaticVariableDeclaration($token);
return $this->setNodePositionsAndReturn($declaration);
}
/**
* This method will parse a static variable declaration.
*
* <code>
* function foo()
* {
* // First declaration
* static $foo;
* // Second declaration
* static $bar = array();
* // Third declaration
* static $baz = array(),
* $foobar = null,
* $barbaz;
* }
* </code>
*
* @param PHP_Depend_Token $token Token with the "static" keyword.
*
* @return PHP_Depend_Code_ASTStaticVariableDeclaration
* @since 0.9.6
*/
private function parseStaticVariableDeclaration(PHP_Depend_Token $token)
{
$staticDeclaration = $this->builder->buildAstStaticVariableDeclaration(
$token->image
);
// Strip optional comments
$this->consumeComments();
// Fetch next token type
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
$staticDeclaration->addChild($this->parseVariableDeclarator());
$this->consumeComments();
// Semicolon terminates static declaration
$tokenType = $this->tokenizer->peek();
if ($tokenType === self::T_SEMICOLON) {
break;
}
// We are here, so there must be a next declarator
$this->consumeToken(self::T_COMMA);
}
return $staticDeclaration;
}
/**
* This method will parse a variable declarator.
*
* <code>
* // Parameter declarator
* function foo($x = 23) {
* }
* // Property declarator
* class Foo{
* protected $bar = 42;
* }
* // Static declarator
* function baz() {
* static $foo;
* }
* </code>
*
* @return PHP_Depend_Code_ASTVariableDeclarator
* @since 0.9.6
*/
private function parseVariableDeclarator()
{
$this->tokenStack->push();
$name = $this->consumeToken(self::T_VARIABLE)->image;
$this->consumeComments();
$declarator = $this->builder->buildAstVariableDeclarator($name);
if ($this->tokenizer->peek() === self::T_EQUAL) {
$this->consumeToken(self::T_EQUAL);
$declarator->setValue($this->parseStaticValueOrStaticArray());
}
return $this->setNodePositionsAndReturn($declarator);
}
/**
* This method will parse a static value or a static array as it is
* used as default value for a parameter or property declaration.
*
* @return PHP_Depend_Code_Value
* @since 0.9.6
*/
private function parseStaticValueOrStaticArray()
{
$this->consumeComments();
if ($this->isArrayStartDelimiter()) {
// TODO: Use default value as value!
$defaultValue = $this->doParseArray(true);
$value = new PHP_Depend_Code_Value();
$value->setValue(array());
return $value;
}
return $this->parseStaticValue();
}
/**
* This method will parse a static default value as it is used for a
* parameter, property or constant declaration.
*
* @return PHP_Depend_Code_Value
* @since 0.9.5
*/
private function parseStaticValue()
{
$defaultValue = new PHP_Depend_Code_Value();
$this->consumeComments();
// By default all parameters positive signed
$signed = 1;
$tokenType = $this->tokenizer->peek();
while ($tokenType !== self::T_EOF) {
switch ($tokenType) {
case self::T_COMMA:
case self::T_SEMICOLON:
case self::T_PARENTHESIS_CLOSE:
if ($defaultValue->isValueAvailable() === true) {
return $defaultValue;
}
throw new PHP_Depend_Parser_MissingValueException($this->tokenizer);
case self::T_NULL:
$token = $this->consumeToken(self::T_NULL);
$defaultValue->setValue(null);
break;
case self::T_TRUE:
$token = $this->consumeToken(self::T_TRUE);
$defaultValue->setValue(true);
break;
case self::T_FALSE:
$token = $this->consumeToken(self::T_FALSE);
$defaultValue->setValue(false);
break;
case self::T_LNUMBER:
$token = $this->consumeToken(self::T_LNUMBER);
$defaultValue->setValue($signed * (int) $token->image);
break;
case self::T_DNUMBER:
$token = $this->consumeToken(self::T_DNUMBER);
$defaultValue->setValue($signed * (double) $token->image);
break;
case self::T_CONSTANT_ENCAPSED_STRING:
$token = $this->consumeToken(self::T_CONSTANT_ENCAPSED_STRING);
$defaultValue->setValue(substr($token->image, 1, -1));
break;
case self::T_DOUBLE_COLON:
$this->consumeToken(self::T_DOUBLE_COLON);
break;
case self::T_PLUS:
$this->consumeToken(self::T_PLUS);
break;
case self::T_MINUS:
$this->consumeToken(self::T_MINUS);
$signed *= -1;
break;
case self::T_DOUBLE_QUOTE:
$defaultValue->setValue($this->parseStringSequence($tokenType));
break;
case self::T_DIR:
case self::T_FILE:
case self::T_LINE:
case self::T_SELF:
case self::T_NS_C:
case self::T_FUNC_C:
case self::T_PARENT:
case self::T_STRING:
case self::T_STATIC:
case self::T_CLASS_C:
case self::T_METHOD_C:
case self::T_BACKSLASH:
case self::T_SQUARED_BRACKET_OPEN:
case self::T_SQUARED_BRACKET_CLOSE:
// There is a default value but we don't handle it at the moment.
$defaultValue->setValue(null);
$this->consumeToken($tokenType);
break;
case self::T_START_HEREDOC:
$defaultValue->setValue(
$this->parseHeredoc()->getChild(0)->getImage()
);
break;
default:
throw new PHP_Depend_Parser_UnexpectedTokenException(
$this->tokenizer->next(),
$this->tokenizer->getSourceFile()
);
}
$this->consumeComments();
$tokenType = $this->tokenizer->peek();
}
// We should never reach this, so throw an exception
throw new PHP_Depend_Parser_TokenStreamEndException($this->tokenizer);
}
/**
* Checks if the given expression is a read/write variable as defined in
* the PHP zend_language_parser.y definition.
*
* @param PHP_Depend_Code_ASTNode $expr The context node instance.
*
* @return boolean
* @since 0.10.0
*/
private function isReadWriteVariable($expr)
{
return ($expr instanceof PHP_Depend_Code_ASTVariable
|| $expr instanceof PHP_Depend_Code_ASTFunctionPostfix
|| $expr instanceof PHP_Depend_Code_ASTVariableVariable
|| $expr instanceof PHP_Depend_Code_ASTCompoundVariable
|| $expr instanceof PHP_Depend_Code_ASTMemberPrimaryPrefix);
}
/**
* This method creates a qualified class or interface name based on the
* current parser state. By default method uses the current namespace scope
* as prefix for the given local name. And it will fallback to a previously
* parsed package annotation, when no namespace declaration was parsed.
*
* @param string $localName The local class or interface name.
*
* @return string
*/
private function createQualifiedTypeName($localName)
{
return ltrim($this->getNamespaceOrPackageName() . '\\' . $localName, '\\');
}
/**
* Returns the name of a declared names. When the parsed code is not namespaced
* this method will return the name from the @package annotation.
*
* @return string
* @since 0.9.8
*/
private function getNamespaceOrPackageName()
{
if ($this->namespaceName === null) {
return $this->packageName;
}
return $this->namespaceName;
}
/**
* Returns the currently active package or namespace.
*
* @return PHP_Depend_Code_Package
* @since 1.0.0
*/
private function getNamespaceOrPackage()
{
return $this->builder->buildPackage($this->getNamespaceOrPackageName());
}
/**
* Extracts the @package information from the given comment.
*
* @param string $comment A doc comment block.
*
* @return string
*/
private function parsePackageAnnotation($comment)
{
$package = self::DEFAULT_PACKAGE;
if (preg_match('#\*\s*@package\s+(\S+)#', $comment, $match)) {
$package = trim($match[1]);
if (preg_match('#\*\s*@subpackage\s+(\S+)#', $comment, $match)) {
$package .= self::PACKAGE_SEPARATOR . trim($match[1]);
}
}
// Check for doc level comment
if ($this->globalPackageName === self::DEFAULT_PACKAGE
&& $this->isFileComment() === true
) {
$this->globalPackageName = $package;
$this->sourceFile->setDocComment($comment);
}
return $package;
}
/**
* Checks that the current token could be used as file comment.
*
* This method checks that the previous token is an open tag and the following
* token is not a class, a interface, final, abstract or a function.
*
* @return boolean
*/
protected function isFileComment()
{
if ($this->tokenizer->prev() !== self::T_OPEN_TAG) {
return false;
}
$notExpectedTags = array(
self::T_CLASS,
self::T_FINAL,
self::T_TRAIT,
self::T_ABSTRACT,
self::T_FUNCTION,
self::T_INTERFACE
);
return !in_array($this->tokenizer->peek(), $notExpectedTags, true);
}
/**
* Returns the class names of all <b>throws</b> annotations with in the
* given comment block.
*
* @param string $comment The context doc comment block.
*
* @return array
*/
private function parseThrowsAnnotations($comment)
{
$throws = array();
if (preg_match_all(self::REGEXP_THROWS_TYPE, $comment, $matches) > 0) {
foreach ($matches[1] as $match) {
$throws[] = $match;
}
}
return $throws;
}
/**
* This method parses the given doc comment text for a return annotation and
* it returns the found return type.
*
* @param string $comment A doc comment text.
*
* @return string
*/
private function parseReturnAnnotation($comment)
{
if (preg_match(self::REGEXP_RETURN_TYPE, $comment, $match) > 0) {
foreach (explode('|', end($match)) as $type) {
if (PHP_Depend_Util_Type::isScalarType($type) === false) {
return $type;
}
}
}
return null;
}
/**
* This method parses the given doc comment text for a var annotation and
* it returns the found property types.
*
* @param string $comment A doc comment text.
*
* @return array(string)
*/
private function parseVarAnnotation($comment)
{
if (preg_match(self::REGEXP_VAR_TYPE, $comment, $match) > 0) {
return array_map('trim', explode('|', end($match)));
}
return array();
}
/**
* This method will extract the type information of a property from it's
* doc comment information. The returned value will be <b>null</b> when no
* type information exists.
*
* @return PHP_Depend_Code_ASTType
* @since 0.9.6
*/
private function parseFieldDeclarationType()
{
// Skip, if ignore annotations is set
if ($this->ignoreAnnotations === true) {
return null;
}
$reference = $this->parseFieldDeclarationClassOrInterfaceReference();
if ($reference !== null) {
return $reference;
}
$annotations = $this->parseVarAnnotation($this->docComment);
foreach ($annotations as $annotation) {
if (PHP_Depend_Util_Type::isPrimitiveType($annotation) === true) {
return $this->builder->buildAstPrimitiveType(
PHP_Depend_Util_Type::getPrimitiveType($annotation)
);
} else if (PHP_Depend_Util_Type::isArrayType($annotation) === true) {
return $this->builder->buildAstTypeArray();
}
}
return null;
}
/**
* Extracts non scalar types from a field doc comment and creates a
* matching type instance.
*
* @return PHP_Depend_Code_ASTClassOrInterfaceReference
* @since 0.9.6
*/
private function parseFieldDeclarationClassOrInterfaceReference()
{
$annotations = $this->parseVarAnnotation($this->docComment);
foreach ($annotations as $annotation) {
if (PHP_Depend_Util_Type::isScalarType($annotation) === false) {
return $this->builder->buildAstClassOrInterfaceReference(
$annotation
);
}
}
return null;
}
/**
* Extracts documented <b>throws</b> and <b>return</b> types and sets them
* to the given <b>$callable</b> instance.
*
* @param PHP_Depend_Code_AbstractCallable $callable The context callable.
*
* @return void
*/
private function prepareCallable(PHP_Depend_Code_AbstractCallable $callable)
{
// Skip, if ignore annotations is set
if ($this->ignoreAnnotations === true) {
return;
}
// Get all @throws Types
$throws = $this->parseThrowsAnnotations($callable->getDocComment());
foreach ($throws as $qualifiedName) {
$callable->addExceptionClassReference(
$this->builder->buildAstClassOrInterfaceReference($qualifiedName)
);
}
// Get return annotation
$qualifiedName = $this->parseReturnAnnotation($callable->getDocComment());
if ($qualifiedName !== null) {
$callable->setReturnClassReference(
$this->builder->buildAstClassOrInterfaceReference($qualifiedName)
);
}
}
/**
* This method will consume the next token in the token stream. It will
* throw an exception if the type of this token is not identical with
* <b>$tokenType</b>.
*
* @param integer $tokenType The next expected token type.
*
* @return PHP_Depend_Token
*/
protected function consumeToken($tokenType)
{
$token = $this->tokenizer->next();
if ($token === self::T_EOF) {
throw new PHP_Depend_Parser_TokenStreamEndException($this->tokenizer);
} else if ($token->type == $tokenType) {
return $this->tokenStack->add($token);
}
throw new PHP_Depend_Parser_UnexpectedTokenException(
$token,
$this->tokenizer->getSourceFile()
);
}
/**
* This method will consume all comment tokens from the token stream.
*
* @return void
*/
protected function consumeComments()
{
$type = $this->tokenizer->peek();
while ($type == self::T_COMMENT || $type == self::T_DOC_COMMENT) {
$token = $this->consumeToken($type);
$type = $this->tokenizer->peek();
if (self::T_COMMENT === $token->type) {
continue;
}
$this->docComment = $token->image;
if (preg_match('(\s+@package\s+[^\s]+\s+)', $token->image)) {
$this->packageName = $this->parsePackageAnnotation($token->image);
}
}
}
}
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