/usr/lib/ruby/vendor_ruby/ruby_parser_extras.rb is in ruby-parser 3.6.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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require 'stringio'
require 'racc/parser'
require 'sexp'
require 'strscan'
require 'ruby_lexer'
require "timeout"
# :stopdoc:
# WHY do I have to do this?!?
class Regexp
ONCE = 0 unless defined? ONCE # FIX: remove this - it makes no sense
unless defined? ENC_NONE then
ENC_NONE = /x/n.options
ENC_EUC = /x/e.options
ENC_SJIS = /x/s.options
ENC_UTF8 = /x/u.options
end
end
# I hate ruby 1.9 string changes
class Fixnum
def ord
self
end
end unless "a"[0] == "a"
# :startdoc:
class RPStringScanner < StringScanner
# if ENV['TALLY'] then
# alias :old_getch :getch
# def getch
# warn({:getch => caller[0]}.inspect)
# old_getch
# end
# end
if "".respond_to? :encoding then
if "".respond_to? :byteslice then
def string_to_pos
string.byteslice(0, pos)
end
else
def string_to_pos
string.bytes.first(pos).pack("c*").force_encoding(string.encoding)
end
end
def charpos
string_to_pos.length
end
else
alias :charpos :pos
def string_to_pos
string[0..pos]
end
end
def unread_many str # TODO: remove this entirely - we should not need it
warn({:unread_many => caller[0]}.inspect) if ENV['TALLY']
begin
string[charpos, 0] = str
rescue IndexError
# HACK -- this is a bandaid on a dirty rag on an open festering wound
end
end
if ENV['DEBUG'] then
alias :old_getch :getch
def getch
c = self.old_getch
p :getch => [c, caller.first]
c
end
alias :old_scan :scan
def scan re
s = old_scan re
where = caller.first.split(/:/).first(2).join(":")
d :scan => [s, where] if s
s
end
end
def d o
$stderr.puts o.inspect
end
end
module RubyParserStuff
VERSION = "3.6.2" unless constants.include? "VERSION" # SIGH
attr_accessor :lexer, :in_def, :in_single, :file
attr_reader :env, :comments
$good20 = []
%w[
].map(&:to_i).each do |n|
$good20[n] = n
end
def debug20 n, v = nil, r = nil
raise "not yet #{n} #{v.inspect} => #{r.inspect}" unless $good20[n]
end
ruby19 = "".respond_to? :encoding
# Rhis is in sorted order of occurrence according to
# charlock_holmes against 500k files, with UTF_8 forced
# to the top.
#
# Overwrite this contstant if you need something different.
ENCODING_ORDER = [
Encoding::UTF_8, # moved to top to reflect default in 2.0
Encoding::ISO_8859_1,
Encoding::ISO_8859_2,
Encoding::ISO_8859_9,
Encoding::SHIFT_JIS,
Encoding::WINDOWS_1252,
Encoding::EUC_JP
] if ruby19
def syntax_error msg
raise RubyParser::SyntaxError, msg
end
def arg_blk_pass node1, node2 # TODO: nuke
node1 = s(:arglist, node1) unless [:arglist, :call_args, :array, :args].include? node1.first
node1 << node2 if node2
node1
end
def arg_concat node1, node2 # TODO: nuke
raise "huh" unless node2
node1 << s(:splat, node2).compact
node1
end
def clean_mlhs sexp
case sexp.sexp_type
when :masgn then
if sexp.size == 2 and sexp[1].sexp_type == :array then
s(:masgn, *sexp[1][1..-1].map { |sub| clean_mlhs sub })
else
debug20 5
sexp
end
when :gasgn, :iasgn, :lasgn, :cvasgn then
if sexp.size == 2 then
sexp.last
else
debug20 7
sexp # optional value
end
else
raise "unsupported type: #{sexp.inspect}"
end
end
def block_var *args
result = self.args args
result[0] = :masgn
result
end
def block_var18 ary, splat, block
ary ||= s(:array)
if splat then
splat = splat[1] unless Symbol === splat
ary << "*#{splat}".to_sym
end
ary << "&#{block[1]}".to_sym if block
if ary.length > 2 or ary.splat then # HACK
s(:masgn, *ary[1..-1])
else
ary.last
end
end
def array_to_hash array
case array.sexp_type
when :kwsplat then
array
else
s(:hash, *array[1..-1])
end
end
def call_args args
result = s(:call_args)
args.each do |arg|
case arg
when Sexp then
case arg.sexp_type
when :array, :args, :call_args then # HACK? remove array at some point
result.concat arg[1..-1]
else
result << arg
end
when Symbol then
result << arg
when ",", nil then
# ignore
else
raise "unhandled: #{arg.inspect} in #{args.inspect}"
end
end
result
end
def args args
result = s(:args)
args.each do |arg|
case arg
when Sexp then
case arg.sexp_type
when :args, :block, :array, :call_args then # HACK call_args mismatch
result.concat arg[1..-1]
when :block_arg then
result << :"&#{arg.last}"
when :shadow then
if Sexp === result.last and result.last.sexp_type == :shadow then
result.last << arg.last
else
result << arg
end
when :masgn, :block_pass, :hash then # HACK: remove. prolly call_args
result << arg
else
raise "unhandled: #{arg.sexp_type} in #{args.inspect}"
end
when Symbol then
name = arg.to_s.delete("&*")
self.env[name.to_sym] = :lvar unless name.empty?
result << arg
when ",", "|", ";", "(", ")", nil then
# ignore
else
raise "unhandled: #{arg.inspect} in #{args.inspect}"
end
end
result
end
def aryset receiver, index
index ||= []
s(:attrasgn, receiver, :"[]=", *index[1..-1]).compact # [][1..-1] => nil
end
def assignable(lhs, value = nil)
id = lhs.to_sym unless Sexp === lhs
id = id.to_sym if Sexp === id
raise "write a test 1" if id.to_s =~ /^(?:self|nil|true|false|__LINE__|__FILE__)$/
raise SyntaxError, "Can't change the value of #{id}" if
id.to_s =~ /^(?:self|nil|true|false|__LINE__|__FILE__)$/
result = case id.to_s
when /^@@/ then
asgn = in_def || in_single > 0
s((asgn ? :cvasgn : :cvdecl), id)
when /^@/ then
s(:iasgn, id)
when /^\$/ then
s(:gasgn, id)
when /^[A-Z]/ then
s(:cdecl, id)
else
case self.env[id]
when :lvar, :dvar, nil then
s(:lasgn, id)
else
raise "wtf? unknown type: #{self.env[id]}"
end
end
self.env[id] ||= :lvar if result.sexp_type == :lasgn
result << value if value
return result
end
def block_append(head, tail)
return head if tail.nil?
return tail if head.nil?
line = [head.line, tail.line].compact.min
head = remove_begin(head)
head = s(:block, head) unless head.node_type == :block
head.line = line
head << tail
end
def cond node
return nil if node.nil?
node = value_expr node
case node.first
when :lit then
if Regexp === node.last then
return s(:match, node)
else
return node
end
when :and then
return s(:and, cond(node[1]), cond(node[2]))
when :or then
return s(:or, cond(node[1]), cond(node[2]))
when :dot2 then
label = "flip#{node.hash}"
env[label] = :lvar
return s(:flip2, node[1], node[2])
when :dot3 then
label = "flip#{node.hash}"
env[label] = :lvar
return s(:flip3, node[1], node[2])
else
return node
end
end
##
# for pure ruby systems only
def do_parse
_racc_do_parse_rb(_racc_setup, false)
end if ENV['PURE_RUBY']
def get_match_node lhs, rhs # TODO: rename to new_match
if lhs then
case lhs[0]
when :dregx, :dregx_once then
return s(:match2, lhs, rhs).line(lhs.line)
when :lit then
return s(:match2, lhs, rhs).line(lhs.line) if Regexp === lhs.last
end
end
if rhs then
case rhs[0]
when :dregx, :dregx_once then
return s(:match3, rhs, lhs).line(lhs.line)
when :lit then
return s(:match3, rhs, lhs).line(lhs.line) if Regexp === rhs.last
end
end
return new_call(lhs, :"=~", argl(rhs)).line(lhs.line)
end
def gettable(id)
lineno = id.lineno if id.respond_to? :lineno
id = id.to_sym if String === id
result = case id.to_s
when /^@@/ then
s(:cvar, id)
when /^@/ then
s(:ivar, id)
when /^\$/ then
s(:gvar, id)
when /^[A-Z]/ then
s(:const, id)
else
type = env[id]
if type then
s(type, id)
else
new_call(nil, id)
end
end
result.line lineno if lineno
raise "identifier #{id.inspect} is not valid" unless result
result
end
##
# Canonicalize conditionals. Eg:
#
# not x ? a : b
#
# becomes:
#
# x ? b : a
attr_accessor :canonicalize_conditions
def initialize(options = {})
super()
v = self.class.name[/1[89]|2[01]/]
self.lexer = RubyLexer.new v && v.to_i
self.lexer.parser = self
@env = RubyParserStuff::Environment.new
@comments = []
@canonicalize_conditions = true
self.reset
end
def list_append list, item # TODO: nuke me *sigh*
return s(:array, item) unless list
list = s(:array, list) unless Sexp === list && list.first == :array
list << item
end
def list_prepend item, list # TODO: nuke me *sigh*
list = s(:array, list) unless Sexp === list && list[0] == :array
list.insert 1, item
list
end
def literal_concat head, tail # TODO: ugh. rewrite
return tail unless head
return head unless tail
htype, ttype = head[0], tail[0]
head = s(:dstr, '', head) if htype == :evstr
case ttype
when :str then
if htype == :str
head[-1] << tail[-1]
elsif htype == :dstr and head.size == 2 then
head[-1] << tail[-1]
else
head << tail
end
when :dstr then
if htype == :str then
lineno = head.line
tail[1] = head[-1] + tail[1]
head = tail
head.line = lineno
else
tail[0] = :array
tail[1] = s(:str, tail[1])
tail.delete_at 1 if tail[1] == s(:str, '')
head.push(*tail[1..-1])
end
when :evstr then
head[0] = :dstr if htype == :str
if head.size == 2 and tail.size > 1 and tail[1][0] == :str then
head[-1] << tail[1][-1]
head[0] = :str if head.size == 2 # HACK ?
else
head.push(tail)
end
else
x = [head, tail]
raise "unknown type: #{x.inspect}"
end
return head
end
def logop(type, left, right) # TODO: rename logical_op
left = value_expr left
if left and left[0] == type and not left.paren then
node, second = left, nil
while (second = node[2]) && second[0] == type and not second.paren do
node = second
end
node[2] = s(type, second, right)
return left
end
return s(type, left, right)
end
def new_aref val
val[2] ||= s(:arglist)
val[2][0] = :arglist if val[2][0] == :array # REFACTOR
if val[0].node_type == :self then
result = new_call nil, :"[]", val[2]
else
result = new_call val[0], :"[]", val[2]
end
result
end
def new_body val
body, resbody, elsebody, ensurebody = val
result = body
if resbody then
result = s(:rescue)
result << body if body
res = resbody
while res do
result << res
res = res.resbody(true)
end
result << elsebody if elsebody
result.line = (body || resbody).line
end
if elsebody and not resbody then
warning("else without rescue is useless")
result = s(:begin, result) if result
result = block_append(result, elsebody)
end
result = s(:ensure, result, ensurebody).compact if ensurebody
result
end
def argl x
x = s(:arglist, x) if x and x[0] == :array
x
end
def backref_assign_error ref
# TODO: need a test for this... obviously
case ref.first
when :nth_ref then
raise "write a test 2"
raise SyntaxError, "Can't set variable %p" % ref.last
when :back_ref then
raise "write a test 3"
raise SyntaxError, "Can't set back reference %p" % ref.last
else
raise "Unknown backref type: #{ref.inspect}"
end
end
def new_call recv, meth, args = nil
result = s(:call, recv, meth)
# TODO: need a test with f(&b) to produce block_pass
# TODO: need a test with f(&b) { } to produce warning
if args
if [:arglist, :args, :array, :call_args].include? args.first
result.concat args.sexp_body
else
result << args
end
end
line = result.grep(Sexp).map(&:line).compact.min
result.line = line if line
result
end
def new_case expr, body, line
result = s(:case, expr)
while body and body.node_type == :when
result << body
body = body.delete_at 3
end
result[2..-1].each do |node|
block = node.block(:delete)
node.concat block[1..-1] if block
end
# else
body = nil if body == s(:block)
result << body
result.line = line
result
end
def new_class val
line, path, superclass, body = val[1], val[2], val[3], val[5]
result = s(:class, path, superclass)
if body then
if body.first == :block then
result.push(*body[1..-1])
else
result.push body
end
end
result.line = line
result.comments = self.comments.pop
result
end
def new_compstmt val
result = void_stmts(val.grep(Sexp)[0])
result = remove_begin(result) if result
result
end
def new_defn val
(_, line), name, _, args, body, * = val
body ||= s(:nil)
result = s(:defn, name.to_sym, args)
if body then
if body.first == :block then
result.push(*body[1..-1])
else
result.push body
end
end
args.line line
result.line = line
result.comments = self.comments.pop
result
end
def new_defs val
recv, name, args, body = val[1], val[4], val[6], val[7]
result = s(:defs, recv, name.to_sym, args)
if body then
if body.first == :block then
result.push(*body[1..-1])
else
result.push body
end
end
result.line = recv.line
result.comments = self.comments.pop
result
end
def new_for expr, var, body
result = s(:for, expr, var).line(var.line)
result << body if body
result
end
def new_if c, t, f
l = [c.line, t && t.line, f && f.line].compact.min
c = cond c
c, t, f = c.last, f, t if c[0] == :not and canonicalize_conditions
s(:if, c, t, f).line(l)
end
def new_iter call, args, body
body ||= nil
args ||= s(:args)
args = s(:args, args) if Symbol === args
result = s(:iter)
result << call if call
result << args
result << body if body
args[0] = :args unless args == 0
result
end
def new_masgn_arg rhs, wrap = false
rhs = value_expr(rhs)
rhs = s(:to_ary, rhs) if wrap # HACK: could be array if lhs isn't right
rhs
end
def new_masgn lhs, rhs, wrap = false
rhs = value_expr(rhs)
rhs = lhs[1] ? s(:to_ary, rhs) : s(:array, rhs) if wrap
lhs.delete_at 1 if lhs[1].nil?
lhs << rhs
lhs
end
def new_module val
line, path, body = val[1], val[2], val[4]
result = s(:module, path)
if body then # REFACTOR?
if body.first == :block then
result.push(*body[1..-1])
else
result.push body
end
end
result.line = line
result.comments = self.comments.pop
result
end
def new_op_asgn val
lhs, asgn_op, arg = val[0], val[1].to_sym, val[2]
name = lhs.value
arg = remove_begin(arg)
result = case asgn_op # REFACTOR
when :"||" then
lhs << arg
s(:op_asgn_or, self.gettable(name), lhs)
when :"&&" then
lhs << arg
s(:op_asgn_and, self.gettable(name), lhs)
else
# TODO: why [2] ?
lhs[2] = new_call(self.gettable(name), asgn_op, argl(arg))
lhs
end
result.line = lhs.line
result
end
def new_regexp val
node = val[1] || s(:str, '')
options = val[2]
o, k = 0, nil
options.split(//).uniq.each do |c| # FIX: this has a better home
v = {
'x' => Regexp::EXTENDED,
'i' => Regexp::IGNORECASE,
'm' => Regexp::MULTILINE,
'o' => Regexp::ONCE,
'n' => Regexp::ENC_NONE,
'e' => Regexp::ENC_EUC,
's' => Regexp::ENC_SJIS,
'u' => Regexp::ENC_UTF8,
}[c]
raise "unknown regexp option: #{c}" unless v
o += v
# encoding options are ignored on 1.9+
k = c if c =~ /[esu]/ if RUBY_VERSION < "1.9"
end
case node[0]
when :str then
node[0] = :lit
node[1] = if k then
Regexp.new(node[1], o, k)
else
begin
Regexp.new(node[1], o)
rescue RegexpError => e
warn "WA\RNING: #{e.message} for #{node[1].inspect} #{options.inspect}"
begin
warn "WA\RNING: trying to recover with ENC_UTF8"
Regexp.new(node[1], Regexp::ENC_UTF8)
rescue RegexpError => e
warn "WA\RNING: trying to recover with ENC_NONE"
Regexp.new(node[1], Regexp::ENC_NONE)
end
end
end
when :dstr then
if options =~ /o/ then
node[0] = :dregx_once
else
node[0] = :dregx
end
node << o if o and o != 0
else
node = s(:dregx, '', node);
node[0] = :dregx_once if options =~ /o/
node << o if o and o != 0
end
node
end
def new_resbody cond, body
if body && body.first == :block then
body.shift # remove block and splat it in directly
else
body = [body]
end
s(:resbody, cond, *body)
end
def new_sclass val
recv, in_def, in_single, body = val[3], val[4], val[6], val[7]
result = s(:sclass, recv)
if body then
if body.first == :block then
result.push(*body[1..-1])
else
result.push body
end
end
result.line = val[2]
self.in_def = in_def
self.in_single = in_single
result
end
def new_string val
str = val[0]
str.force_encoding("ASCII-8BIT") unless str.valid_encoding? unless RUBY_VERSION < "1.9"
result = s(:str, str)
self.lexer.lineno += str.count("\n") + self.lexer.extra_lineno
self.lexer.extra_lineno = 0
result
end
def new_super args
if args && args.node_type == :block_pass then
s(:super, args)
else
args ||= s(:arglist)
s(:super, *args[1..-1])
end
end
def new_undef n, m = nil
if m then
block_append(n, s(:undef, m))
else
s(:undef, n)
end
end
def new_until block, expr, pre
new_until_or_while :until, block, expr, pre
end
def new_until_or_while type, block, expr, pre
other = type == :until ? :while : :until
line = [block && block.line, expr.line].compact.min
block, pre = block.last, false if block && block[0] == :begin
expr = cond expr
result = unless expr.first == :not and canonicalize_conditions then
s(type, expr, block, pre)
else
s(other, expr.last, block, pre)
end
result.line = line
result
end
def new_when cond, body
s(:when, cond, body)
end
def new_while block, expr, pre
new_until_or_while :while, block, expr, pre
end
def new_xstring str
if str then
case str[0]
when :str
str[0] = :xstr
when :dstr
str[0] = :dxstr
else
str = s(:dxstr, '', str)
end
str
else
s(:xstr, '')
end
end
def new_yield args = nil
# TODO: raise args.inspect unless [:arglist].include? args.first # HACK
raise "write a test 4" if args && args.node_type == :block_pass
raise SyntaxError, "Block argument should not be given." if
args && args.node_type == :block_pass
args ||= s(:arglist)
args[0] = :arglist if [:call_args, :array].include?(args[0])
args = s(:arglist, args) unless args.first == :arglist
return s(:yield, *args[1..-1])
end
def next_token
token = self.lexer.next_token
if token and token.first != RubyLexer::EOF then
return token
else
return [false, '$end']
end
end
def node_assign(lhs, rhs) # TODO: rename new_assign
return nil unless lhs
rhs = value_expr rhs
case lhs[0]
when :lasgn, :iasgn, :cdecl, :cvdecl, :gasgn, :cvasgn, :attrasgn then
lhs << rhs
when :const then
lhs[0] = :cdecl
lhs << rhs
else
raise "unknown lhs #{lhs.inspect} w/ #{rhs.inspect}"
end
lhs
end
##
# Returns a UTF-8 encoded string after processing BOMs and magic
# encoding comments.
#
# Holy crap... ok. Here goes:
#
# Ruby's file handling and encoding support is insane. We need to be
# able to lex a file. The lexer file is explicitly UTF-8 to make
# things cleaner. This allows us to deal with extended chars in
# class and method names. In order to do this, we need to encode all
# input source files as UTF-8. First, we look for a UTF-8 BOM by
# looking at the first line while forcing its encoding to
# ASCII-8BIT. If we find a BOM, we strip it and set the expected
# encoding to UTF-8. Then, we search for a magic encoding comment.
# If found, it overrides the BOM. Finally, we force the encoding of
# the input string to whatever was found, and then encode that to
# UTF-8 for compatibility with the lexer.
def handle_encoding str
str = str.dup
ruby19 = str.respond_to? :encoding
encoding = nil
header = str.lines.first(2)
header.map! { |s| s.force_encoding "ASCII-8BIT" } if ruby19
first = header.first || ""
encoding, str = "utf-8", str[3..-1] if first =~ /\A\xEF\xBB\xBF/
encoding = $1.strip if header.find { |s|
s[/^#.*?-\*-.*?coding:\s*([^ ;]+).*?-\*-/, 1] ||
s[/^#.*(?:en)?coding(?:\s*[:=])\s*([\w-]+)/, 1]
}
if encoding then
if ruby19 then
encoding.sub!(/utf-8-.+$/, 'utf-8') # HACK for stupid emacs formats
hack_encoding str, encoding
else
warn "Skipping magic encoding comment"
end
else
# nothing specified... ugh. try to encode as utf-8
hack_encoding str if ruby19
end
str
end
def hack_encoding str, extra = nil
encodings = ENCODING_ORDER.dup
encodings.unshift(extra) unless extra.nil?
# terrible, horrible, no good, very bad, last ditch effort.
encodings.each do |enc|
begin
str.force_encoding enc
if str.valid_encoding? then
str.encode! Encoding::UTF_8
break
end
rescue Encoding::InvalidByteSequenceError
# do nothing
rescue Encoding::UndefinedConversionError
# do nothing
end
end
# no amount of pain is enough for you.
raise "Bad encoding. Need a magic encoding comment." unless
str.encoding.name == "UTF-8"
end
##
# Parse +str+ at path +file+ and return a sexp. Raises
# Timeout::Error if it runs for more than +time+ seconds.
def process(str, file = "(string)", time = 10)
Timeout.timeout time do
raise "bad val: #{str.inspect}" unless String === str
str = handle_encoding str
self.file = file.dup
@yydebug = ENV.has_key? 'DEBUG'
# HACK -- need to get tests passing more than have graceful code
self.lexer.ss = RPStringScanner.new str
do_parse
end
end
alias :parse :process
def remove_begin node
oldnode = node
if node and :begin == node[0] and node.size == 2 then
node = node[-1]
node.line = oldnode.line
end
node
end
def reset
lexer.reset
self.in_def = false
self.in_single = 0
self.env.reset
self.comments.clear
end
def block_dup_check call_or_args, block
syntax_error "Both block arg and actual block given." if
block and call_or_args.block_pass?
end
def inverted? val
[:return, :next, :break, :yield].include? val[0].sexp_type
end
def invert_block_call val
(type, call), iter = val
iter.insert 1, call
[iter, s(type)]
end
def ret_args node
if node then
raise "write a test 5" if node[0] == :block_pass
raise SyntaxError, "block argument should not be given" if
node[0] == :block_pass
node[0] = :array if node[0] == :call_args
node = node.last if node[0] == :array && node.size == 2
# HACK matz wraps ONE of the FOUR splats in a newline to
# distinguish. I use paren for now. ugh
node = s(:svalue, node) if node[0] == :splat and not node.paren
node[0] = :svalue if node[0] == :arglist && node[1][0] == :splat
end
node
end
def s(*args)
result = Sexp.new(*args)
result.line ||= lexer.lineno if lexer.ss # otherwise...
result.file = self.file
result
end
def value_expr oldnode # HACK
node = remove_begin oldnode
node.line = oldnode.line if oldnode
node[2] = value_expr(node[2]) if node and node[0] == :if
node
end
def void_stmts node
return nil unless node
return node unless node[0] == :block
node[1..-1] = node[1..-1].map { |n| remove_begin(n) }
node
end
def warning s
# do nothing for now
end
alias yyerror syntax_error
def on_error(et, ev, values)
super
rescue Racc::ParseError => e
# I don't like how the exception obscures the error message
e.message.replace "%s:%p :: %s" % [self.file, lexer.lineno, e.message.strip]
warn e.message if $DEBUG
raise
end
class Keyword
class KWtable
attr_accessor :name, :state, :id0, :id1
def initialize(name, id=[], state=nil)
@name = name
@id0, @id1 = id
@state = state
end
end
##
# :stopdoc:
#
# :expr_beg = ignore newline, +/- is a sign.
# :expr_end = newline significant, +/- is a operator.
# :expr_arg = newline significant, +/- is a operator.
# :expr_cmdarg = newline significant, +/- is a operator.
# :expr_endarg = newline significant, +/- is a operator.
# :expr_mid = newline significant, +/- is a operator.
# :expr_fname = ignore newline, no reserved words.
# :expr_dot = right after . or ::, no reserved words.
# :expr_class = immediate after class, no here document.
wordlist = [
["end", [:kEND, :kEND ], :expr_end ],
["else", [:kELSE, :kELSE ], :expr_beg ],
["case", [:kCASE, :kCASE ], :expr_beg ],
["ensure", [:kENSURE, :kENSURE ], :expr_beg ],
["module", [:kMODULE, :kMODULE ], :expr_beg ],
["elsif", [:kELSIF, :kELSIF ], :expr_beg ],
["def", [:kDEF, :kDEF ], :expr_fname ],
["rescue", [:kRESCUE, :kRESCUE_MOD ], :expr_mid ],
["not", [:kNOT, :kNOT ], :expr_beg ],
["then", [:kTHEN, :kTHEN ], :expr_beg ],
["yield", [:kYIELD, :kYIELD ], :expr_arg ],
["for", [:kFOR, :kFOR ], :expr_beg ],
["self", [:kSELF, :kSELF ], :expr_end ],
["false", [:kFALSE, :kFALSE ], :expr_end ],
["retry", [:kRETRY, :kRETRY ], :expr_end ],
["return", [:kRETURN, :kRETURN ], :expr_mid ],
["true", [:kTRUE, :kTRUE ], :expr_end ],
["if", [:kIF, :kIF_MOD ], :expr_beg ],
["defined?", [:kDEFINED, :kDEFINED ], :expr_arg ],
["super", [:kSUPER, :kSUPER ], :expr_arg ],
["undef", [:kUNDEF, :kUNDEF ], :expr_fname ],
["break", [:kBREAK, :kBREAK ], :expr_mid ],
["in", [:kIN, :kIN ], :expr_beg ],
["do", [:kDO, :kDO ], :expr_beg ],
["nil", [:kNIL, :kNIL ], :expr_end ],
["until", [:kUNTIL, :kUNTIL_MOD ], :expr_beg ],
["unless", [:kUNLESS, :kUNLESS_MOD ], :expr_beg ],
["or", [:kOR, :kOR ], :expr_beg ],
["next", [:kNEXT, :kNEXT ], :expr_mid ],
["when", [:kWHEN, :kWHEN ], :expr_beg ],
["redo", [:kREDO, :kREDO ], :expr_end ],
["and", [:kAND, :kAND ], :expr_beg ],
["begin", [:kBEGIN, :kBEGIN ], :expr_beg ],
["__LINE__", [:k__LINE__, :k__LINE__ ], :expr_end ],
["class", [:kCLASS, :kCLASS ], :expr_class ],
["__FILE__", [:k__FILE__, :k__FILE__ ], :expr_end ],
["END", [:klEND, :klEND ], :expr_end ],
["BEGIN", [:klBEGIN, :klBEGIN ], :expr_end ],
["while", [:kWHILE, :kWHILE_MOD ], :expr_beg ],
["alias", [:kALIAS, :kALIAS ], :expr_fname ],
["__ENCODING__", [:k__ENCODING__, :k__ENCODING__], :expr_end],
].map { |args| KWtable.new(*args) }
# :startdoc:
WORDLIST18 = Hash[*wordlist.map { |o| [o.name, o] }.flatten]
WORDLIST19 = Hash[*wordlist.map { |o| [o.name, o] }.flatten]
WORDLIST18.delete "__ENCODING__"
%w[and case elsif for if in module or unless until when while].each do |k|
WORDLIST19[k] = WORDLIST19[k].dup
WORDLIST19[k].state = :expr_value
end
%w[not].each do |k|
WORDLIST19[k] = WORDLIST19[k].dup
WORDLIST19[k].state = :expr_arg
end
def self.keyword18 str # REFACTOR
WORDLIST18[str]
end
def self.keyword19 str
WORDLIST19[str]
end
end
class Environment
attr_reader :env, :dyn
def [] k
self.all[k]
end
def []= k, v
raise "no" if v == true
self.current[k] = v
end
def all
idx = @dyn.index(false) || 0
@env[0..idx].reverse.inject { |env, scope| env.merge scope }
end
def current
@env.first
end
def extend dyn = false
@dyn.unshift dyn
@env.unshift({})
end
def initialize dyn = false
@dyn = []
@env = []
self.reset
end
def reset
@dyn.clear
@env.clear
self.extend
end
def unextend
@dyn.shift
@env.shift
raise "You went too far unextending env" if @env.empty?
end
end
class StackState
attr_reader :name
attr_reader :stack
attr_accessor :debug
def initialize(name)
@name = name
@stack = [false]
@debug = false
end
def inspect
"StackState(#{@name}, #{@stack.inspect})"
end
def is_in_state
p :stack_is_in_state => [name, @stack.last, caller.first] if debug
@stack.last
end
def lexpop
p :stack_lexpop => caller.first if debug
raise if @stack.size == 0
a = @stack.pop
b = @stack.pop
@stack.push(a || b)
end
def pop
r = @stack.pop
p :stack_pop => [name, r, @stack, caller.first] if debug
@stack.push false if @stack.size == 0
r
end
def push val
@stack.push val
p :stack_push => [name, @stack, caller.first] if debug
nil
end
def store
result = @stack.dup
@stack.replace [false]
result
end
def restore oldstate
@stack.replace oldstate
end
end
end
class Ruby21Parser < Racc::Parser
include RubyParserStuff
end
class Ruby20Parser < Racc::Parser
include RubyParserStuff
end
class Ruby19Parser < Racc::Parser
include RubyParserStuff
end
class Ruby18Parser < Racc::Parser
include RubyParserStuff
end
##
# RubyParser is a compound parser that first attempts to parse using
# the 1.9 syntax parser and falls back to the 1.8 syntax parser on a
# parse error.
class RubyParser
class SyntaxError < RuntimeError; end
def initialize
@p18 = Ruby18Parser.new
@p19 = Ruby19Parser.new
@p20 = Ruby20Parser.new
@p21 = Ruby21Parser.new
end
def process s, f = "(string)", t = 10
e = nil
[@p21, @p20, @p19, @p18].each do |parser|
begin
return parser.process s, f, t
rescue Racc::ParseError, RubyParser::SyntaxError => exc
e = exc
end
end
raise e
end
alias :parse :process
def reset
@p18.reset
@p19.reset
@p20.reset
@p21.reset
end
def self.for_current_ruby
case RUBY_VERSION
when /^1\.8/ then
Ruby18Parser.new
when /^1\.9/ then
Ruby19Parser.new
when /^2.0/ then
Ruby20Parser.new
when /^2.1/ then
Ruby21Parser.new
else
raise "unrecognized RUBY_VERSION #{RUBY_VERSION}"
end
end
end
############################################################
# HACK HACK HACK HACK HACK HACK HACK HACK HACK HACK HACK HACK
unless "".respond_to?(:grep) then
class String
def grep re
lines.grep re
end
end
end
class String
##
# This is a hack used by the lexer to sneak in line numbers at the
# identifier level. This should be MUCH smaller than making
# process_token return [value, lineno] and modifying EVERYTHING that
# reduces tIDENTIFIER.
attr_accessor :lineno
end
class Sexp
attr_writer :paren
def paren
@paren ||= false
end
def value
raise "multi item sexp" if size > 2
last
end
def to_sym
raise "no: #{self.inspect}.to_sym is a bug"
self.value.to_sym
end
alias :add :<<
def add_all x
self.concat x.sexp_body
end
def block_pass?
any? { |s| Sexp === s && s[0] == :block_pass }
end
alias :node_type :sexp_type
alias :values :sexp_body # TODO: retire
end
# END HACK
############################################################
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