This module provides a simple debugger for grammars. Just use it:
use Grammar::Debugger;
And any grammar in the lexical scope of the use satement 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".
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.
Please file them in GitHub issues.