# Grammar::Debugger [![Build Status](https://travis-ci.org/jnthn/grammar-debugger.svg?branch=master)](https://travis-ci.org/jnthn/grammar-debugger)
This module provides a simple debugger for grammars. Just `use` it:

    use Grammar::Debugger;

And any grammar in the lexical scope of the `use` statement will
automatically have debugging enabled. The debugger will break
execution when you first enter the grammar, and provide a prompt.
Type "h" for a list of commands.

If you are debugging a grammar and want to set up breakpoints in
code rather than entering them manually at the debug prompt, you
can apply the breakpoint trait to any rule:

    token name is breakpoint { \w+ [\h+ \w+]* }

If you want to conditionally break, you can also do something like:

    token name will break { $^m eq 'Russia' } { \w+ [\h+ \w+]* }

Which will only break after the name rule has matched "Russia".

# Grammar::Tracer
This gives similar output to Grammar::Debugger, but just runs through
the whole grammar without stopping until it is successful or fails.
Once again, after a use:

    use Grammar::Tracer;

It will apply to any grammars in the lexical scope of the use statement.

# Bugs? Ideas?
Please file them in [GitHub issues](https://github.com/jnthn/grammar-debugger/issues).
