I'm still hoping to find something simpler w/o needing to compile XS-modules, preferably within the core.

Pipe dream if you ask me, look at http://perl5.git.perl.org/perl.git/blob#l14597 and http://perl5.git.perl.org/perl.git/blob?f=regcomp.h#l778

I imagine you might be able to peek at a regex structure using B, but you can't get at the debug messages, they're not stored, and you can't hook DEBUG_COMPILE macros

In reply to Re^3: Dynamically inspecting Regex OP-Codes at runtime? by Anonymous Monk
in thread Dynamically inspecting Regex OP-Codes at runtime? by LanX

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