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This directory contains many examples of JavaCC and JJTree input grammars.
We recommend you see the examples in the following order. Each directory
contains a README file with more detailed instructions:
SimpleExamples:
This is a set of very simple JavaCC examples. After trying these
examples out, you should be able to build reasonably complex
examples yourself.
MailProcessing:
These examples illustrate the use of JavaCC in parsing emacs
mail files. They highlight the use of lexical states.
JJTreeExamples:
There are simple input grammars for JJTree, the tree building
preprocessor.
CORBA-IDL:
This is a grammar for the IDL interface definition language of
OMG CORBA 2.0.
JavaGrammars:
This directory contains extremely well debugged and maintained
Java grammars for both the 1.0.2 and 1.1 versions of the
language.
JavaCCGrammar:
This directory contains the official JavaCC/JJTree grammar. This
is the grammar based on which JavaCC and JJTree are built.
Transformer:
This example illustrates how a Java language extension is defined
and transformed back into Java. This makes use of JJTree.
GUIParsing:
These examples illustrate how one may obtain input for parsing
or lexical analysis from a GUI, and thereby provide "parsing"
of GUI interactions. In addition, one of these examples
illustrates how state machines may be described as lexical
specifications.
Obfuscator:
This is a complete implementation of a Java obfuscator. This
allows one to take a set of Java source files and modify them
into semantically equivalent source files that are much more
difficult to read. This example shows the usage of multiple
parsers used from one system.
Interpreter:
This is an interpreter for a simple language with declarations,
assignments, expressions, conditionals, loops, etc. It
demonstrates really nicely a complex example where JJTree is
used to drastically simplify the process of generating parse
trees. All actions are really methods built into the generated
tree nodes.
Lookahead:
This directory contains the tutorial on LOOKAHEAD along with all
examples used in the tutorial.
VTransformer:
This directory contains an example of using the Visitor design
pattern with JJTree. Like the Transformer example, it shows how
a Java program can be processed into a slightly different form.
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