Create a perl5130delta.pod

[p5sagit/p5-mst-13.2.git] / op.c

diff --git a/op.c b/op.c
index f506bff..9c94cc8 100644 (file)
--- a/op.c
+++ b/op.c
@@ -562,6 +562,7 @@ Perl_op_clear(pTHX_ OP *o)
            o->op_targ = 0;
            goto retry;
        }
+    case OP_ENTERTRY:
     case OP_ENTEREVAL: /* Was holding hints. */
        o->op_targ = 0;
        break;
@@ -985,7 +986,7 @@ Perl_scalarvoid(pTHX_ OP *o)
     want = o->op_flags & OPf_WANT;
     if ((want && want != OPf_WANT_SCALAR)
         || (PL_parser && PL_parser->error_count)
-        || o->op_type == OP_RETURN)
+        || o->op_type == OP_RETURN || o->op_type == OP_REQUIRE)
     {
        return o;
     }
@@ -1086,6 +1087,17 @@ Perl_scalarvoid(pTHX_ OP *o)
            useless = OP_DESC(o);
        break;
 
+    case OP_SPLIT:
+       kid = cLISTOPo->op_first;
+       if (kid && kid->op_type == OP_PUSHRE
+#ifdef USE_ITHREADS
+               && !((PMOP*)kid)->op_pmreplrootu.op_pmtargetoff)
+#else
+               && !((PMOP*)kid)->op_pmreplrootu.op_pmtargetgv)
+#endif
+           useless = OP_DESC(o);
+       break;
+
     case OP_NOT:
        kid = cUNOPo->op_first;
        if (kid->op_type != OP_MATCH && kid->op_type != OP_SUBST &&
@@ -1215,10 +1227,6 @@ Perl_scalarvoid(pTHX_ OP *o)
     case OP_ENTEREVAL:
        scalarkids(o);
        break;
-    case OP_REQUIRE:
-       /* all requires must return a boolean value */
-       o->op_flags &= ~OPf_WANT;
-       /* FALL THROUGH */
     case OP_SCALAR:
        return scalar(o);
     }
@@ -1307,10 +1315,6 @@ Perl_list(pTHX_ OP *o)
        }
        PL_curcop = &PL_compiling;
        break;
-    case OP_REQUIRE:
-       /* all requires must return a boolean value */
-       o->op_flags &= ~OPf_WANT;
-       return scalar(o);
     }
     return o;
 }
@@ -3089,6 +3093,7 @@ Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
        || (PL_opargs[type] & OA_CLASS_MASK) == OA_FILESTATOP
        || (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP
        || type == OP_SASSIGN
+       || type == OP_ENTERTRY
        || type == OP_NULL );
 
     if (!first)
@@ -4274,7 +4279,7 @@ Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
                    || left->op_type == OP_PADHV
                    || left->op_type == OP_PADANY))
        {
-           maybe_common_vars = FALSE;
+           if (left->op_type == OP_PADSV) maybe_common_vars = FALSE;
            if (left->op_private & OPpPAD_STATE) {
                /* All single variable list context state assignments, hence
                   state ($a) = ...
@@ -5710,7 +5715,9 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
                 )&& !attrs) {
                if (CvFLAGS(PL_compcv)) {
                    /* might have had built-in attrs applied */
-                   CvFLAGS(cv) |= (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS);
+                   if (CvLVALUE(PL_compcv) && ! CvLVALUE(cv) && ckWARN(WARN_MISC))
+                       Perl_warner(aTHX_ packWARN(WARN_MISC), "lvalue attribute ignored after the subroutine has been defined");
+                   CvFLAGS(cv) |= (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS & ~CVf_LVALUE);
                }
                /* just a "sub foo;" when &foo is already defined */
                SAVEFREESV(PL_compcv);
@@ -5779,8 +5786,9 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
                   && block->op_type != OP_NULL
 #endif
        ) {
+           cv_flags_t existing_builtin_attrs = CvFLAGS(cv) & CVf_BUILTIN_ATTRS;
            cv_undef(cv);
-           CvFLAGS(cv) = CvFLAGS(PL_compcv);
+           CvFLAGS(cv) = CvFLAGS(PL_compcv) | existing_builtin_attrs;
            if (!CvWEAKOUTSIDE(cv))
                SvREFCNT_dec(CvOUTSIDE(cv));
            CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
@@ -6597,8 +6605,6 @@ Perl_ck_eval(pTHX_ OP *o)
            /* establish postfix order */
            enter->op_next = (OP*)enter;
 
-           CHECKOP(OP_ENTERTRY, enter);
-
            o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
            o->op_type = OP_LEAVETRY;
            o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
@@ -7207,10 +7213,10 @@ Perl_ck_grep(pTHX_ OP *o)
     if (o->op_flags & OPf_STACKED) {
        OP* k;
        o = ck_sort(o);
-        kid = cLISTOPo->op_first->op_sibling;
-       if (!cUNOPx(kid)->op_next)
-           Perl_croak(aTHX_ "panic: ck_grep");
-       for (k = cUNOPx(kid)->op_first; k; k = k->op_next) {
+        kid = cUNOPx(cLISTOPo->op_first->op_sibling)->op_first;
+       if (kid->op_type != OP_SCOPE && kid->op_type != OP_LEAVE)
+           return no_fh_allowed(o);
+       for (k = kid; k; k = k->op_next) {
            kid = k;
        }
        NewOp(1101, gwop, 1, LOGOP);
@@ -7677,7 +7683,7 @@ Perl_ck_require(pTHX_ OP *o)
        return newop;
     }
 
-    return ck_fun(o);
+    return scalar(ck_fun(o));
 }
 
 OP *
@@ -8364,6 +8370,7 @@ Perl_ck_each(pTHX_ OP *o)
    container of the rep_op var */
 STATIC OP *
 S_opt_scalarhv(pTHX_ OP *rep_op) {
+    dVAR;
     UNOP *unop;
 
     PERL_ARGS_ASSERT_OPT_SCALARHV;
@@ -8674,7 +8681,7 @@ Perl_peep(pTHX_ register OP *o)
             ){ 
                 OP * nop = o;
                 OP * lop = o;
-                if (!(nop->op_flags && OPf_WANT_VOID)) {
+                if (!((nop->op_flags & OPf_WANT) == OPf_WANT_VOID)) {
                     while (nop && nop->op_next) {
                         switch (nop->op_next->op_type) {
                             case OP_NOT:
@@ -8692,7 +8699,7 @@ Perl_peep(pTHX_ register OP *o)
                         }
                     }            
                 }
-                if (lop->op_flags && OPf_WANT_VOID) {
+                if ((lop->op_flags & OPf_WANT) == OPf_WANT_VOID) {
                     if (fop->op_type == OP_PADHV || fop->op_type == OP_RV2HV) 
                         cLOGOP->op_first = opt_scalarhv(fop);
                     if (sop && (sop->op_type == OP_PADHV || sop->op_type == OP_RV2HV))