yacc

Generate a parser from a grammar file

$ yacc [grammar.y]

$ yacc -d [grammar.y]

$ yacc -b [prefix] [grammar.y]

$ yacc -p [prefix] [grammar.y]

$ yacc -v [grammar.y]

$ yacc -t [grammar.y]

$ yacc -r [grammar.y]

yacc [-dgilrtv] [-b prefix] [-p prefix] filename

yacc (Yet Another Compiler Compiler) is an LALR(1) parser generator that reads grammar specifications and generates C code for a parser. The grammar file defines tokens, syntax rules, and semantic actions.
yacc produces y.tab.c containing parsing tables and a driver routine. When used with -d, it also generates y.tab.h with token definitions for use with lex/flex lexers.
On most Linux systems, yacc is actually bison (GNU parser generator) or byacc (Berkeley Yacc), both compatible with traditional AT&T yacc.

-b prefix

Use prefix for output filenames instead of y.

Generate header file y.tab.h with token definitions.

Generate graphviz format file y.dot for visualization.

Generate supplementary header file y.tab.i.

Do not insert #line directives in generated code.

Use prefix for yacc-generated symbols instead of yy.

Create a reentrant (pure) parser.

Generate separate files for code (y.code.c) and tables (y.tab.c).

Enable debugging statements in compiled code.

Generate verbose description file y.output.

Print version information.

yacc reports shift/reduce and reduce/reduce conflicts that may indicate grammar ambiguities. Rules that are never reduced are also reported. The generated parser uses global variables by default; use -P for reentrant parsers.

yacc was written by Stephen C. Johnson at Bell Labs and first released in 1975 for Unix Version 6. The name stands for "Yet Another Compiler Compiler". Berkeley Yacc (byacc) was written by Robert Corbett in 1989 as a public domain implementation. GNU Bison, a compatible replacement with extensions, was first released in 1985 and is the standard yacc on GNU/Linux systems.

bison(1), lex(1), flex(1), cc(1)