OpTypes

A Perl program/subroutine is represented internally by a syntax tree built from OP nodes. Perl 5.005 had 346 different OP-codes, Perl 5.11.2 has 365 OP-Codes, see opnames.h. In Perl there are 12 different OP classes, that are related like the following class hierarchy diagram shows:

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1998 Gisle Aas, 2009 Reini Urban
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