YACC(I) 6/6/73 YACC(I)
NAME
yacc - yet another compiler-compiler
SYNOPSIS
yacc [ -v ] [ grammar ]
DESCRIPTION
Yacc converts a context-free grammar into a set of tables
for a simple automaton which executes an LR(1) parsing
algorithm. The grammar may be ambiguous; specified
precedence rules are used to break ambiguities.
The output is y.tab.c, which must be compiled by the C
compiler and loaded with any other routines required
(perhaps a lexical analyzer) and the Yacc library:
cc y.tab.c other.o -ly
If the -v flag is given, the file y.output is prepared,
which contains a description of the parsing tables and a
report on conflicts generated by ambiguities in the grammar.
SEE ALSO
``LR Parsing'', by A. V. Aho and S. C. Johnson, Computing
Surveys, June, 1974. ``The YACC Compiler-compiler'',
internal memorandum.
AUTHOR
S. C. Johnson
FILES
y.output
y.tab.c
/lib/liby.a runtime library for compiler
DIAGNOSTICS
The number of reduce-reduce and shift-reduce conflicts is
reported on the standard output; a more detailed report is
found in the y.output file.
BUGS