Branch: refs/heads/blead
Home: https://github.com/Perl/perl5
Commit: abf1aa2b099b9613c2e6901d3f61eb8da735d934
https://github.com/Perl/perl5/commit/abf1aa2b099b9613c2e6901d3f61eb8da735d934
Author: Paul "LeoNerd" Evans <leon...@leonerd.org.uk>
Date: 2022-12-19 (Mon, 19 Dec 2022)
Changed paths:
M embed.h
M ext/Opcode/Opcode.pm
M lib/B/Op_private.pm
M op.c
M opcode.h
M opnames.h
M pp.c
M pp_proto.h
M proto.h
M regen/op_private
M regen/opcodes
Log Message:
-----------
Define OP_HELEMEXISTSOR, a handy LOGOP shortcut for HELEM existence tests
This op is constructed using an OP_HELEM as the op_first and any scalar
expression as the op_other.
It is roughly equivalent to the following perl code:
exists $hv{$key} ? $hv{$key} : OTHER
except that the HV and the KEY expression are evaluated only once, and
only one hv_* function is invoked to both test and obtain the value. It
is therefore smaller and more efficient.
Likewise, adding the OPpHELEMEXISTSOR_DELETE flag turns it into the
equivalent of
exists $hv{$key} ? delete $hv{$key} : OTHER
