libb-hooks-op-check-entersubforcv-perl - 0.10-3+b2 main

B::Hooks::OP::Check::EntersubForCV is a perl module to register and
unregister handlers to be executed when an entersub opcode for a
given CV is compiled.
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This enables you to hook one subroutine onto another, and have it
executed before the originally called subroutine.