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java语法解释器生成器

This directory contains a scanner and parser for the Java programming language.

You need the parser generator CUP v0.10j (or newer) for the parser to work.
Use the Makefile to generate the lexer and parser, or type:

jflex unicode.flex
jflex java.flex
java java_cup.Main -interface < java12.cup
javac JavaParser.java TestLexer.java


The parser can be tested with:
java JavaParser <inputfiles>

The scanner (without parser attached) can be test with:
java TestLexer <inputfiles>


files:

unicode.flex
  JFlex specification for the Unicode preprocessing phase
  (see section 3.3 of the Java Language Specification).
  Demonstrates how to implement a FilterReader with JFlex.

java.flex
  JFlex specification for the "real" Java 1.2 lexer.

java12.cup
  CUP specification for the Java 1.2 parser
  Copyright (C) 1998 by C. Scott Ananian <[e-mail]>
  (with small modifications to interface with the Lexer)

JavaParser.java
  a simple main class to run the parser (no other useful output though)

TestLexer.java
  a simple test driver for the scanner, produces debug output

lexer-output.good
  lexer output for input file TestLexer.java for testing