sablecc.github.io

Java 1.7 Grammar

Here is a Java 1.7 grammar for SableCC.

This grammar requires SableCC 3.7 or newer.
After automatic inlining, the grammar becomes LALR(1).
The complete parser requires a Unicode preprocessor in addition to the normal lexer/parser. The code of a complete parser program is provided.
The parser has not been tested with Java files containing unusual Unicode characters. It should work, but we would appreciate any feedback you have.
The grammar is based on the natural grammar exposed throughout the text of the the Java Language Specification Java SE 7 Edition 2012-07-27. It is not based on the LL grammar exposed in Chapter 18.
The grammar is annotated with various issues discovered while transcribing the grammar and resolving its conflicts.

java-1.7.sablecc: This file contains the Java 1.7 grammar.
java-1.7-preprocessor.sablecc: This file contains a grammar for the lexical Unicode preprocessor.
Main.java: This file contains the source code the the main class of a test application that launches the Java 1.7 parser.
UnicodePreprocessor.java: This files contains the source code of the Unicode preprocessor.
UnicodeLexer.java: This file contains a customized lexer for the Unicode preprocessor.

UnicodeLetter.java: This file contains a class that could be used to improve the lexical part of the Java 1.7 grammar.
java-1.7-non-lalr.sablecc: This file contains the grammar as it was before the LALR(1) changes.

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