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regex: Remove FOLDCHAR regnode type
[perl5.git] / op.c
diff --git a/op.c b/op.c
index e1cae25..2b7bc37 100644 (file)
--- a/op.c
+++ b/op.c
@@ -102,6 +102,7 @@ recursive, but it's recursive on basic blocks, not on tree nodes.
 #define PERL_IN_OP_C
 #include "perl.h"
 #include "keywords.h"
+#include "feature.h"
 
 #define CALL_PEEP(o) PL_peepp(aTHX_ o)
 #define CALL_RPEEP(o) PL_rpeepp(aTHX_ o)
@@ -836,7 +837,8 @@ Perl_op_contextualize(pTHX_ OP *o, I32 context)
        case G_ARRAY:  return list(o);
        case G_VOID:   return scalarvoid(o);
        default:
-           Perl_croak(aTHX_ "panic: op_contextualize bad context");
+           Perl_croak(aTHX_ "panic: op_contextualize bad context %ld",
+                      (long) context);
            return o;
     }
 }
@@ -1114,6 +1116,7 @@ Perl_scalarvoid(pTHX_ OP *o)
     case OP_GGRGID:
     case OP_GETLOGIN:
     case OP_PROTOTYPE:
+    case OP_RUNCV:
       func_ops:
        if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
            /* Otherwise it's "Useless use of grep iterator" */
@@ -1729,6 +1732,8 @@ Perl_op_lvalue_flags(pTHX_ OP *o, I32 type, U32 flags)
 
     assert( (o->op_flags & OPf_WANT) != OPf_WANT_VOID );
 
+    if (type == OP_PRTF || type == OP_SPRINTF) type = OP_ENTERSUB;
+
     switch (o->op_type) {
     case OP_UNDEF:
        localize = 0;
@@ -1755,7 +1760,7 @@ Perl_op_lvalue_flags(pTHX_ OP *o, I32 type, U32 flags)
                           |(OPpENTERSUB_INARGS * (type == OP_LEAVESUBLV));
            PL_modcount = RETURN_UNLIMITED_NUMBER;
            if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
-               /* Backward compatibility mode: */
+               /* Potential lvalue context: */
                o->op_private |= OPpENTERSUB_INARGS;
                break;
            }
@@ -1775,29 +1780,6 @@ Perl_op_lvalue_flags(pTHX_ OP *o, I32 type, U32 flags)
                while (kid->op_sibling)
                    kid = kid->op_sibling;
                if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
-                   /* Indirect call */
-                   if (kid->op_type == OP_METHOD_NAMED
-                       || kid->op_type == OP_METHOD)
-                   {
-                       UNOP *newop;
-
-                       NewOp(1101, newop, 1, UNOP);
-                       newop->op_type = OP_RV2CV;
-                       newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
-                       newop->op_first = NULL;
-                        newop->op_next = (OP*)newop;
-                       kid->op_sibling = (OP*)newop;
-                       newop->op_private |= OPpLVAL_INTRO;
-                       newop->op_private &= ~1;
-                       break;
-                   }
-
-                   if (kid->op_type != OP_RV2CV)
-                       Perl_croak(aTHX_
-                                  "panic: unexpected lvalue entersub "
-                                  "entry via type/targ %ld:%"UVuf,
-                                  (long)kid->op_type, (UV)kid->op_targ);
-                   kid->op_private |= OPpLVAL_INTRO;
                    break;      /* Postpone until runtime */
                }
 
@@ -1811,25 +1793,12 @@ Perl_op_lvalue_flags(pTHX_ OP *o, I32 type, U32 flags)
                               "entry via type/targ %ld:%"UVuf,
                               (long)kid->op_type, (UV)kid->op_targ);
                if (kid->op_type != OP_GV) {
-                   /* Restore RV2CV to check lvalueness */
-                 restore_2cv:
-                   if (kid->op_next && kid->op_next != kid) { /* Happens? */
-                       okid->op_next = kid->op_next;
-                       kid->op_next = okid;
-                   }
-                   else
-                       okid->op_next = NULL;
-                   okid->op_type = OP_RV2CV;
-                   okid->op_targ = 0;
-                   okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
-                   okid->op_private |= OPpLVAL_INTRO;
-                   okid->op_private &= ~1;
                    break;
                }
 
                cv = GvCV(kGVOP_gv);
                if (!cv)
-                   goto restore_2cv;
+                   break;
                if (CvLVALUE(cv))
                    break;
            }
@@ -2566,7 +2535,9 @@ Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
           && (gv = cGVOPx_gv(cUNOPx(left)->op_first))
               ? varname(gv, isary ? '@' : '%', 0, NULL, 0, 1)
               : NULL
-        : varname(NULL, isary ? '@' : '%', left->op_targ, NULL, 0, 1);
+        : varname(
+           (GV *)PL_compcv, isary ? '@' : '%', left->op_targ, NULL, 0, 1
+          );
       if (name)
        Perl_warner(aTHX_ packWARN(WARN_MISC),
              "Applying %s to %"SVf" will act on scalar(%"SVf")",
@@ -4504,6 +4475,7 @@ Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
     PVOP *pvop;
 
     assert((PL_opargs[type] & OA_CLASS_MASK) == OA_PVOP_OR_SVOP
+       || type == OP_RUNCV
        || (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP);
 
     NewOp(1101, pvop, 1, PVOP);
@@ -4667,22 +4639,32 @@ Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg)
            newSTATEOP(0, NULL, imop) ));
 
     if (use_version) {
-       /* If we request a version >= 5.9.5, load feature.pm with the
+       HV * const hinthv = GvHV(PL_hintgv);
+       const bool hhoff = !hinthv || !(PL_hints & HINT_LOCALIZE_HH);
+
+       /* Enable the
         * feature bundle that corresponds to the required version. */
        use_version = sv_2mortal(new_version(use_version));
+       S_enable_feature_bundle(aTHX_ use_version);
 
-       if (vcmp(use_version,
-                sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
-           SV *const importsv = vnormal(use_version);
-           *SvPVX_mutable(importsv) = ':';
-           ENTER_with_name("load_feature");
-           Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
-           LEAVE_with_name("load_feature");
-       }
        /* If a version >= 5.11.0 is requested, strictures are on by default! */
        if (vcmp(use_version,
                 sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
-           PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
+           if (hhoff || !hv_exists(hinthv, "strict/refs", 11))
+               PL_hints |= HINT_STRICT_REFS;
+           if (hhoff || !hv_exists(hinthv, "strict/subs", 11))
+               PL_hints |= HINT_STRICT_SUBS;
+           if (hhoff || !hv_exists(hinthv, "strict/vars", 11))
+               PL_hints |= HINT_STRICT_VARS;
+       }
+       /* otherwise they are off */
+       else {
+           if (hhoff || !hv_exists(hinthv, "strict/refs", 11))
+               PL_hints &= ~HINT_STRICT_REFS;
+           if (hhoff || !hv_exists(hinthv, "strict/subs", 11))
+               PL_hints &= ~HINT_STRICT_SUBS;
+           if (hhoff || !hv_exists(hinthv, "strict/vars", 11))
+               PL_hints &= ~HINT_STRICT_VARS;
        }
     }
 
@@ -4729,7 +4711,7 @@ Loads the module whose name is pointed to by the string part of name.
 Note that the actual module name, not its filename, should be given.
 Eg, "Foo::Bar" instead of "Foo/Bar.pm".  flags can be any of
 PERL_LOADMOD_DENY, PERL_LOADMOD_NOIMPORT, or PERL_LOADMOD_IMPORT_OPS
-(or 0 for no flags). ver, if specified, provides version semantics
+(or 0 for no flags). ver, if specified and not NULL, provides version semantics
 similar to C<use Foo::Bar VERSION>.  The optional trailing SV*
 arguments can be used to specify arguments to the module's import()
 method, similar to C<use Foo::Bar VERSION LIST>.  They must be
@@ -4738,6 +4720,8 @@ be omitted when the PERL_LOADMOD_NOIMPORT flag has been used.
 Otherwise at least a single NULL pointer to designate the default
 import list is required.
 
+The reference count for each specified C<SV*> parameter is decremented.
+
 =cut */
 
 void
@@ -6121,6 +6105,7 @@ S_newGIVWHENOP(pTHX_ OP *cond, OP *block,
        /* This is a default {} block */
        enterop->op_first = block;
        enterop->op_flags |= OPf_SPECIAL;
+       o      ->op_flags |= OPf_SPECIAL;
 
        o->op_next = (OP *) enterop;
     }
@@ -6487,7 +6472,9 @@ Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
        ps = NULL;
 
     if (name) {
-       gv = gv_fetchsv(cSVOPo->op_sv, gv_fetch_flags, SVt_PVCV);
+       gv = isGV(cSVOPo->op_sv)
+             ? (GV *)cSVOPo->op_sv
+             : gv_fetchsv(cSVOPo->op_sv, gv_fetch_flags, SVt_PVCV);
        has_name = TRUE;
     } else if (PERLDB_NAMEANON && CopLINE(PL_curcop)) {
        SV * const sv = sv_newmortal();
@@ -6851,6 +6838,7 @@ S_process_special_blocks(pTHX_ const char *const fullname, GV *const gv,
        } else if (*name == 'C') {
            if (strEQ(name, "CHECK")) {
                if (PL_main_start)
+                   /* diag_listed_as: Too late to run %s block */
                    Perl_ck_warner(aTHX_ packWARN(WARN_VOID),
                                   "Too late to run CHECK block");
                Perl_av_create_and_unshift_one(aTHX_ &PL_checkav, MUTABLE_SV(cv));
@@ -6860,6 +6848,7 @@ S_process_special_blocks(pTHX_ const char *const fullname, GV *const gv,
        } else if (*name == 'I') {
            if (strEQ(name, "INIT")) {
                if (PL_main_start)
+                   /* diag_listed_as: Too late to run %s block */
                    Perl_ck_warner(aTHX_ packWARN(WARN_VOID),
                                   "Too late to run INIT block");
                Perl_av_create_and_push(aTHX_ &PL_initav, MUTABLE_SV(cv));
@@ -7092,6 +7081,7 @@ Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
                Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
                            "Format %"SVf" redefined", SVfARG(cSVOPo->op_sv));
            } else {
+               /* diag_listed_as: Format %s redefined */
                Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
                            "Format STDOUT redefined");
            }
@@ -7333,8 +7323,12 @@ Perl_ck_cmp(pTHX_ OP *o)
     if (ckWARN(WARN_SYNTAX)) {
        const OP *kid = cUNOPo->op_first;
        if (kid && (
-               is_dollar_bracket(aTHX_ kid)
-            || ((kid = kid->op_sibling) && is_dollar_bracket(aTHX_ kid))
+               (
+                  is_dollar_bracket(aTHX_ kid)
+               && kid->op_sibling && kid->op_sibling->op_type == OP_CONST
+               )
+            || (  kid->op_type == OP_CONST
+               && (kid = kid->op_sibling) && is_dollar_bracket(aTHX_ kid))
           ))
            Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
                        "$[ used in %s (did you mean $] ?)", OP_DESC(o));
@@ -7439,6 +7433,7 @@ Perl_ck_eof(pTHX_ OP *o)
     PERL_ARGS_ASSERT_CK_EOF;
 
     if (o->op_flags & OPf_KIDS) {
+       OP *kid;
        if (cLISTOPo->op_first->op_type == OP_STUB) {
            OP * const newop
                = newUNOP(o->op_type, OPf_SPECIAL, newGVOP(OP_GV, 0, PL_argvgv));
@@ -7449,7 +7444,10 @@ Perl_ck_eof(pTHX_ OP *o)
 #endif
            o = newop;
        }
-       return ck_fun(o);
+       o = ck_fun(o);
+       kid = cLISTOPo->op_first;
+       if (kid->op_type == OP_RV2GV)
+           kid->op_private |= OPpALLOW_FAKE;
     }
     return o;
 }
@@ -7511,6 +7509,7 @@ Perl_ck_eval(pTHX_ OP *o)
        op_getmad(oldo,o,'O');
     }
     o->op_targ = (PADOFFSET)PL_hints;
+    if (o->op_private & OPpEVAL_BYTES) o->op_targ &= ~HINT_UTF8;
     if ((PL_hints & HINT_LOCALIZE_HH) != 0
      && !(o->op_private & OPpEVAL_COPHH) && GvHV(PL_hintgv)) {
        /* Store a copy of %^H that pp_entereval can pick up. */
@@ -7520,7 +7519,7 @@ Perl_ck_eval(pTHX_ OP *o)
        o->op_private |= OPpEVAL_HAS_HH;
 
        if (!(o->op_private & OPpEVAL_BYTES)
-        && FEATURE_IS_ENABLED("unieval"))
+        && FEATURE_UNIEVAL_IS_ENABLED)
            o->op_private |= OPpEVAL_UNICODE;
     }
     return o;
@@ -7917,6 +7916,7 @@ Perl_ck_fun(pTHX_ OP *o)
                             const char *name = NULL;
                            STRLEN len = 0;
                             U32 name_utf8 = 0;
+                           bool want_dollar = TRUE;
 
                            flags = 0;
                            /* Set a flag to tell rv2gv to vivify
@@ -7983,6 +7983,7 @@ Perl_ck_fun(pTHX_ OP *o)
                                 if (!name) {
                                      name = "__ANONIO__";
                                      len = 10;
+                                     want_dollar = FALSE;
                                 }
                                 op_lvalue(kid, type);
                            }
@@ -7991,7 +7992,7 @@ Perl_ck_fun(pTHX_ OP *o)
                                targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
                                namesv = PAD_SVl(targ);
                                SvUPGRADE(namesv, SVt_PV);
-                               if (*name != '$')
+                               if (want_dollar && *name != '$')
                                    sv_setpvs(namesv, "$");
                                sv_catpvn(namesv, name, len);
                                 if ( name_utf8 ) SvUTF8_on(namesv);
@@ -8151,7 +8152,7 @@ Perl_ck_grep(pTHX_ OP *o)
        return o;
     kid = cLISTOPo->op_first->op_sibling;
     if (kid->op_type != OP_NULL)
-       Perl_croak(aTHX_ "panic: ck_grep");
+       Perl_croak(aTHX_ "panic: ck_grep, type=%u", (unsigned) kid->op_type);
     kid = kUNOP->op_first;
 
     if (!gwop)
@@ -8217,11 +8218,6 @@ Perl_ck_defined(pTHX_ OP *o)             /* 19990527 MJD */
     if ((o->op_flags & OPf_KIDS)) {
        switch (cUNOPo->op_first->op_type) {
        case OP_RV2AV:
-           /* This is needed for
-              if (defined %stash::)
-              to work.   Do not break Tk.
-              */
-           break;                      /* Globals via GV can be undef */
        case OP_PADAV:
        case OP_AASSIGN:                /* Is this a good idea? */
            Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
@@ -8249,7 +8245,11 @@ Perl_ck_readline(pTHX_ OP *o)
 {
     PERL_ARGS_ASSERT_CK_READLINE;
 
-    if (!(o->op_flags & OPf_KIDS)) {
+    if (o->op_flags & OPf_KIDS) {
+        OP *kid = cLISTOPo->op_first;
+        if (kid->op_type == OP_RV2GV) kid->op_private |= OPpALLOW_FAKE;
+    }
+    else {
        OP * const newop
            = newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, PL_argvgv));
 #ifdef PERL_MAD
@@ -8301,6 +8301,7 @@ Perl_ck_listiob(pTHX_ OP *o)
     if (!kid)
        op_append_elem(o->op_type, o, newDEFSVOP());
 
+    if (o->op_type == OP_PRTF) return modkids(listkids(o), OP_PRTF);
     return listkids(o);
 }
 
@@ -8758,8 +8759,6 @@ Perl_ck_sort(pTHX_ OP *o)
                kid->op_next = k;
            o->op_flags |= OPf_SPECIAL;
        }
-       else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
-           op_null(firstkid);
 
        firstkid = firstkid->op_sibling;
     }
@@ -8861,7 +8860,7 @@ Perl_ck_split(pTHX_ OP *o)
 
     kid = cLISTOPo->op_first;
     if (kid->op_type != OP_NULL)
-       Perl_croak(aTHX_ "panic: ck_split");
+       Perl_croak(aTHX_ "panic: ck_split, type=%u", (unsigned) kid->op_type);
     kid = kid->op_sibling;
     op_free(cLISTOPo->op_first);
     if (kid)
@@ -9085,7 +9084,8 @@ Perl_ck_entersub_args_proto(pTHX_ OP *entersubop, GV *namegv, SV *protosv)
     const char *e = NULL;
     PERL_ARGS_ASSERT_CK_ENTERSUB_ARGS_PROTO;
     if (SvTYPE(protosv) == SVt_PVCV ? !SvPOK(protosv) : !SvOK(protosv))
-       Perl_croak(aTHX_ "panic: ck_entersub_args_proto CV with no proto");
+       Perl_croak(aTHX_ "panic: ck_entersub_args_proto CV with no proto,"
+                  "flags=%lx", (unsigned long) SvFLAGS(protosv));
     if (SvTYPE(protosv) == SVt_PVCV)
         proto = CvPROTO(protosv), proto_len = CvPROTOLEN(protosv);
     else proto = SvPV(protosv, proto_len);
@@ -9370,7 +9370,6 @@ Perl_ck_entersub_args_core(pTHX_ OP *entersubop, GV *namegv, SV *protosv)
        for (cvop = aop; cvop->op_sibling; cvop = cvop->op_sibling) ;
        if (PL_madskills) while (aop != cvop && aop->op_type == OP_STUB) {
            aop = aop->op_sibling;
-           continue;
        }
        if (aop != cvop)
            (void)too_many_arguments(entersubop, GvNAME(namegv));
@@ -9437,7 +9436,9 @@ Perl_ck_entersub_args_core(pTHX_ OP *entersubop, GV *namegv, SV *protosv)
                    (void)too_many_arguments(aop, GvNAME(namegv));
                op_free(aop);
            }
-           return newOP(opnum,0);
+           return opnum == OP_RUNCV
+               ? newPVOP(OP_RUNCV,0,NULL)
+               : newOP(opnum,0);
        default:
            return convert(opnum,0,aop);
        }
@@ -9652,6 +9653,19 @@ Perl_ck_substr(pTHX_ OP *o)
 }
 
 OP *
+Perl_ck_tell(pTHX_ OP *o)
+{
+    PERL_ARGS_ASSERT_CK_TELL;
+    o = ck_fun(o);
+    if (o->op_flags & OPf_KIDS) {
+     OP *kid = cLISTOPo->op_first;
+     if (kid->op_type == OP_NULL && kid->op_sibling) kid = kid->op_sibling;
+     if (kid->op_type == OP_RV2GV) kid->op_private |= OPpALLOW_FAKE;
+    }
+    return o;
+}
+
+OP *
 Perl_ck_each(pTHX_ OP *o)
 {
     dVAR;
@@ -9708,7 +9722,8 @@ Perl_ck_length(pTHX_ OP *o)
                 case OP_PADHV:
                 case OP_PADAV:
                     name = varname(
-                        NULL, hash ? '%' : '@', kid->op_targ, NULL, 0, 1
+                        (GV *)PL_compcv, hash ? '%' : '@', kid->op_targ,
+                        NULL, 0, 1
                     );
                     break;
                 case OP_RV2HV:
@@ -9796,7 +9811,7 @@ S_inplace_aassign(pTHX_ OP *o) {
        return;
 
     assert(cUNOPx(modop)->op_first->op_type == OP_PUSHMARK);
-    oright = cUNOPx(modop)->op_first->op_sibling;
+    if (!(oright = cUNOPx(modop)->op_first->op_sibling)) return;
 
     if (modop->op_flags & OPf_STACKED) {
        /* skip sort subroutine/block */
@@ -10281,6 +10296,42 @@ Perl_rpeep(pTHX_ register OP *o)
            }
            break;
 
+       case OP_RUNCV:
+           if (!(o->op_private & OPpOFFBYONE) && !CvCLONE(PL_compcv)) {
+               SV *sv;
+               if (CvUNIQUE(PL_compcv)) sv = &PL_sv_undef;
+               else {
+                   sv = newRV((SV *)PL_compcv);
+                   sv_rvweaken(sv);
+                   SvREADONLY_on(sv);
+               }
+               o->op_type = OP_CONST;
+               o->op_ppaddr = PL_ppaddr[OP_CONST];
+               o->op_flags |= OPf_SPECIAL;
+               cSVOPo->op_sv = sv;
+           }
+           break;
+
+       case OP_SASSIGN:
+           if (OP_GIMME(o,0) == G_VOID) {
+               OP *right = cBINOP->op_first;
+               if (right) {
+                   OP *left = right->op_sibling;
+                   if (left->op_type == OP_SUBSTR
+                        && (left->op_private & 7) < 4) {
+                       op_null(o);
+                       cBINOP->op_first = left;
+                       right->op_sibling =
+                           cBINOPx(left)->op_first->op_sibling;
+                       cBINOPx(left)->op_first->op_sibling = right;
+                       left->op_private |= OPpSUBSTR_REPL_FIRST;
+                       left->op_flags =
+                           (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
+                   }
+               }
+           }
+           break;
+
        case OP_CUSTOM: {
            Perl_cpeep_t cpeep = 
                XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_peep);