Customize Compiler

Customize Compiler implements a statically strong typed language which compiles to Java. Its semantics is a subset of C but allows user-defined lexical and grammatical form by simply changing lexer.json and production.json.

some minor features

• an optional interpreter as an back-end
• jsonify/serialize abstract syntax tree
• print generated automata using Latex
• generate Sublime syntax highlight configuration for user-defined lexical form
• interpret source code and show code coverage

Customize lexical and grammatical form

There are three steps:

1. edit lexer.json to define lexical form (regular expression is supported)
2. edit production.json to define grammatical form (with a little limitation)
3. run Grammar Factory main method and it will dynamically generate the parser

There are three examples in Syntax folder to show how to do this:

1. C++
2. Visual Basic
3. Frog 🐸 (this is chinese programming language, mod is represented as '膜')

Usage

Different arguments could be used to trigger different functionality:

>java Compiler -help
Usage: compiler [option]
Default:
FILE_NAME                      : compile FILE_NAME to AST
Option:
-exec AST_NAME                 : execute AST_NAME
-json JSON_FILE_NAME AST_NAME  : generate JSON format AST to JSON_FILE_NAME from AST_NAME
-showcoverage SOURCE_NAME      : show SOURCE_NAME code coverage
-tojava JAVA_NAME AST_NAME     : show java code to JAVA_NAME from AST_NAME
-repl                          : running REPL
-help                          : show this
...

documentation

see documentation.pdf for more information.

Stack

• JUnit
• Cup - a LALR parser generator