Java parser (Java parser written in nML)

Sunae Seo
ROPAS
Computer Science
Korea Advanced Institute of Science and Technology

Courtesy
The grammar of Java programming language used here is from CUP.

Introduction
This package contains a parser for Java programming language implemented in nlex, nyacc and nmlc. The executable of this package gets Java source code and produces abstract syntax tree represented as a set of nML data types. The grammar(JDK 1.2) used here is from CUP, a parser generator for Java programming language.

Implementation
After unpacking the source, you can see source code files and README file. In the code files, there are parser related rule files(lexer.nl, parser.ny), abstract syntax tree definition file(ast_gen.n), files for printing and so on. Detailed information of all files is in README file. There are three kinds of printing options.

-pa : print the abstract syntax tree of the given Java program.
-pc : print the Java source code from abstract syntax tree of the given Java program.
-pl : print the lex tokens till the current parsing position.

Restrictions

• The lex implementation of this parser doesn't support unicode character set.
• The ranges of proper values of each literal(char, int, float) in Java are not the same as those in nML. So there might be overflow or underflow problems. If you don't want to lose information from the difference of two language literals, please treat them as string(that is, modify parts of the code).

Download
javaparser.tar.gz