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75c3746ce2
The name "defines" is incorrect, the generated file contains far more than just #defines. * src/getargs.h, src/getargs.c (-H, --header): New option. With optional argument, just like --defines, --xml, etc. (defines_flag): Rename as... (header_flag): this. Adjust dependencies. * data/skeletons/bison.m4, data/skeletons/c.m4, data/skeletons/glr.c, * data/skeletons/glr.cc, data/skeletons/glr2.cc, data/skeletons/lalr1.cc, * data/skeletons/yacc.c: Adjust. * examples, doc/bison.texi: Adjust. * tests/headers.at, tests/local.at, tests/output.at: Convert most tests from using --defines to using --header.
reccalc - recursive calculator with Flex and Bison
In this example the generated parser is pure and reentrant: it can be used concurrently in different threads, or recursively. As a proof of this reentrancy, expressions in parenthesis are tokenized as strings, and then recursively parsed from the parser:
exp: STR
{
result r = parse_string ($1);
free ($1);
if (r.nerrs)
{
res->nerrs += r.nerrs;
YYERROR;
}
else
$$ = r.value;
}