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# xbib Jacc

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This is xbib Jacc, a derived work of Mark P. Jones' jacc project at http://web.cecs.pdx.edu/~mpj/jacc/

jacc is a parser generator for Java that is closely modeled on Johnsons classic yacc parser generator for C.

What makes jacc different from other tools?

- Close syntactic compatibility with Johnsons classic yacc parser gen- erator for C (in so far as is possible given that the two tools target different languages)

- Semantic compatibility with yacc—jacc generates bottom-up/shift-reduce parsers for LALR(1) grammars with disambiguating rules

- A pure Java implementation that is portable and runs on many Java development platforms

- Modest additions to help users understand and debug generated parsers, including: a feature for tracing parser behavior on sample inputs and tests for LR(0) and SLR(1) conflicts

- A mechanism for generating syntax error messages from examples based on ideas described by Jeffery

- Generated parsers that use the technique described by Bhamidipaty and Proebsting for creating very fast yacc-compatible parsers by generating code instead of encoding the specifics of a particular parser in a set of tables as the classic yacc implementations normally do

xbib Jacc has the following extra features and modifications:

- build system is Gradle

- Java 8, compiles under JRE profile `compact1`

- removed HTML output

- added logging

- lots of fixes to conform to sonarqube rules

- junit tests

There is a Gradle plugin for jacc available at https://github.com/jprante/gradle-plugin-jacc