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LRSTAR Parser Generator (formerly LRGEN Parser Generator)

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LRSTAR Parser Generator is a handy, easy to use, command line based LALR parser generator that generates very-fast parsers in C/C++, 2 times the speed of YACC parsers. It comes with the DFAC lexer generator and compiler front-end source code in C/C++. It reads TBNF grammar notation, which is very powerful for defining compiler front-ends. LRSTAR creates compressed matrix parser tables for high-performance parsing (500,000 lines per second or more). It creates parsers that build a symbol table and abstract-syntax tree (AST) automatically. LRSTAR is capable of building parsers from grammars that have 70,000 rules or more. Works very well with the DFAC lexer generator.

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