/* op.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
op_free(right);
return Nullop;
}
+ /* optimise C<my @x = ()> to C<my @x>, and likewise for hashes */
+ if ((left->op_type == OP_PADAV || left->op_type == OP_PADHV)
+ && right->op_type == OP_STUB
+ && (left->op_private & OPpLVAL_INTRO))
+ {
+ op_free(right);
+ return left;
+ }
curop = list(force_list(left));
o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
o->op_private = (U8)(0 | (flags >> 8));
Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
if (SvPOK(cv))
Perl_sv_catpvf(aTHX_ msg, " (%"SVf")", (SV *)cv);
+ else
+ Perl_sv_catpvf(aTHX_ msg, ": none");
sv_catpv(msg, " vs ");
if (p)
Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
return kid;
}
}
+ /* optimise C<my $x = undef> to C<my $x> */
+ if (kid->op_type == OP_UNDEF) {
+ OP *kkid = kid->op_sibling;
+ if (kkid && kkid->op_type == OP_PADSV
+ && (kkid->op_private & OPpLVAL_INTRO))
+ {
+ cLISTOPo->op_first = NULL;
+ kid->op_sibling = NULL;
+ op_free(o);
+ op_free(kid);
+ return kkid;
+ }
+ }
return o;
}
o->op_next : o->op_next->op_next;
IV i;
if (pop && pop->op_type == OP_CONST &&
- (PL_op = pop->op_next) &&
+ ((PL_op = pop->op_next)) &&
pop->op_next->op_type == OP_AELEM &&
!(pop->op_next->op_private &
(OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF|OPpMAYBE_LVSUB)) &&
i >= 0)
{
GV *gv;
+ if (cSVOPx(pop)->op_private & OPpCONST_STRICT)
+ no_bareword_allowed(pop);
if (o->op_type == OP_GV)
op_null(o->op_next);
op_null(pop->op_next);