Description:

ANTLR, ANother Tool for Language Recognition, (formerly PCCTS) is a
language tool that provides a framework for constructing recognizers,
compilers, and translators from grammatical descriptions containing
Java, C#, or C++ actions. ANTLR is popular because it is easy to
understand, powerful, flexible, generates human-readable output, and
comes with complete source. ANTLR provides excellent support for tree
construction, tree walking, and translation.