yagg, given YACC-like and LEX-like input files,
generates a C++ program that generates all strings
of a user-specified length. This program can then
be used to generate inputs for testing, or to
validate that a grammar accepts the strings that
you think it does. The grammar file provides the
grammar productions for string generation, along
with optional action blocks that can perform
context-sensitive checks in order to limit the
generated strings. The LEX-like terminal generator
file provides specifications that instruct the
program how to generate strings for terminals in
the grammar.
