/* 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.
useless = OP_DESC(o);
break;
+ case OP_NOT:
+ kid = cUNOPo->op_first;
+ if (kid->op_type != OP_MATCH && kid->op_type != OP_SUBST &&
+ kid->op_type != OP_TRANS) {
+ goto func_ops;
+ }
+ useless = "negative pattern binding (!~)";
+ break;
+
case OP_RV2GV:
case OP_RV2SV:
case OP_RV2AV:
return o;
}
+/* XXX kept for BINCOMPAT only */
void
Perl_save_hints(pTHX)
{
- SAVEI32(PL_hints);
- SAVESPTR(GvHV(PL_hintgv));
- GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
- SAVEFREESV(GvHV(PL_hintgv));
+ Perl_croak(aTHX_ "internal error: obsolete function save_hints() called");
}
int
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);
+ left->op_flags &= ~(OPf_REF|OPf_SPECIAL);
+ return left;
+ }
curop = list(force_list(left));
o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
o->op_private = (U8)(0 | (flags >> 8));
no_bareword_allowed(first);
else if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
Perl_warner(aTHX_ packWARN(WARN_BAREWORD), "Bareword found in conditional");
- if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
+ if ((type == OP_AND && SvTRUE(((SVOP*)first)->op_sv)) ||
+ (type == OP_OR && !SvTRUE(((SVOP*)first)->op_sv)) ||
+ (type == OP_DOR && !SvOK(((SVOP*)first)->op_sv))) {
op_free(first);
*firstp = Nullop;
- other->op_private |= OPpCONST_SHORTCIRCUIT;
+ if (other->op_type == OP_CONST)
+ other->op_private |= OPpCONST_SHORTCIRCUIT;
return other;
}
else {
op_free(other);
*otherp = Nullop;
- first->op_private |= OPpCONST_SHORTCIRCUIT;
+ if (first->op_type == OP_CONST)
+ first->op_private |= OPpCONST_SHORTCIRCUIT;
return first;
}
}
gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
op_free(o);
o = newop;
+ return o;
}
else {
if ((PL_hints & HINT_FILETEST_ACCESS) &&
OP* k;
o = ck_sort(o);
kid = cLISTOPo->op_first->op_sibling;
- for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
+ for (k = cUNOPx(kid)->op_first; k; k = k->op_next) {
kid = k;
}
kid->op_next = (OP*)gwop;
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;
}
|| (o2->op_flags & OPf_WANT) != OPf_WANT_VOID)
break;
+ /* check that the sort is the first arg on RHS of assign */
+
+ o2 = cUNOPx(o2)->op_first;
+ if (!o2 || o2->op_type != OP_NULL)
+ break;
+ o2 = cUNOPx(o2)->op_first;
+ if (!o2 || o2->op_type != OP_PUSHMARK)
+ break;
+ if (o2->op_sibling != o)
+ break;
+
/* check the array is the same on both sides */
if (oleft->op_type == OP_RV2AV) {
if (oright->op_type != OP_RV2AV