Remove the _ prototype, as Maintainers is used by makemeta, and in turn

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

diff --git a/pad.c b/pad.c
index 415b59e..ea27408 100644 (file)
--- a/pad.c
+++ b/pad.c
@@ -102,6 +102,8 @@ to be generated in evals, such as
 
     { my $x = 1; sub f { eval '$x'} } f();
 
+For state vars, SVf_PADSTALE is overloaded to mean 'not yet initialised'
+
 =cut
 */
 
@@ -168,7 +170,7 @@ Perl_pad_new(pTHX_ int flags)
            SAVEI32(PL_comppad_name_fill);
            SAVEI32(PL_min_intro_pending);
            SAVEI32(PL_max_intro_pending);
-           SAVEI32(PL_cv_has_eval);
+           SAVEBOOL(PL_cv_has_eval);
            if (flags & padnew_SAVESUB) {
                SAVEI32(PL_pad_reset_pending);
            }
@@ -255,8 +257,8 @@ Perl_pad_undef(pTHX_ CV* cv)
        return;
 
     DEBUG_X(PerlIO_printf(Perl_debug_log,
-         "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf"\n",
-           PTR2UV(cv), PTR2UV(padlist))
+         "Pad undef: cv=0x%"UVxf" padlist=0x%"UVxf" comppad=0x%"UVxf"\n",
+           PTR2UV(cv), PTR2UV(padlist), PTR2UV(PL_comppad))
     );
 
     /* detach any '&' anon children in the pad; if afterwards they
@@ -347,12 +349,11 @@ Perl_pad_add_name(pTHX_ const char *name, HV* typestash, HV* ourstash, bool fake
 {
     dVAR;
     const PADOFFSET offset = pad_alloc(OP_PADSV, SVs_PADMY);
-    SV* const namesv = newSV(0);
+    SV* const namesv
+       = newSV_type((ourstash || typestash) ? SVt_PVMG : SVt_PVNV);
 
     ASSERT_CURPAD_ACTIVE("pad_add_name");
 
-
-    sv_upgrade(namesv, (ourstash || typestash) ? SVt_PVMG : SVt_PVNV);
     sv_setpv(namesv, name);
 
     if (typestash) {
@@ -485,9 +486,8 @@ Perl_pad_add_anon(pTHX_ SV* sv, OPCODE op_type)
 {
     dVAR;
     PADOFFSET ix;
-    SV* const name = newSV(0);
+    SV* const name = newSV_type(SVt_PVNV);
     pad_peg("add_anon");
-    sv_upgrade(name, SVt_PVNV);
     sv_setpvn(name, "&", 1);
     /* Are these two actually ever read? */
     COP_SEQ_RANGE_HIGH_set(name, ~0);
@@ -552,7 +552,7 @@ Perl_pad_check_dup(pTHX_ const char *name, bool is_our, const HV *ourstash)
                break; /* "our" masking "our" */
            Perl_warner(aTHX_ packWARN(WARN_MISC),
                "\"%s\" variable %s masks earlier declaration in same %s",
-               (is_our ? "our" : PL_in_my == KEY_my ? "my" : "state"),
+               (is_our ? "our" : PL_parser->in_my == KEY_my ? "my" : "state"),
                name,
                (COP_SEQ_RANGE_HIGH(sv) == PAD_MAX ? "scope" : "statement"));
            --off;
@@ -770,6 +770,7 @@ S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn,
                else {
                    int newwarn = warn;
                    if (!CvCOMPILED(cv) && (*out_flags & PAD_FAKELEX_MULTI)
+                        && !SvPAD_STATE(name_svp[offset])
                         && warn && ckWARN(WARN_CLOSURE)) {
                        newwarn = 0;
                        Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
@@ -798,7 +799,9 @@ S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn,
                        "Pad findlex cv=0x%"UVxf" found lex=0x%"UVxf"\n",
                        PTR2UV(cv), PTR2UV(*out_capture)));
 
-                   if (SvPADSTALE(*out_capture)) {
+                   if (SvPADSTALE(*out_capture)
+                       && !SvPAD_STATE(name_svp[offset]))
+                   {
                        if (ckWARN(WARN_CLOSURE))
                            Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
                                "Variable \"%s\" is not available", name);
@@ -855,7 +858,7 @@ S_pad_findlex(pTHX_ const char *name, const CV* cv, U32 seq, int warn,
                    ? SvSTASH(*out_name_sv) : NULL,
            SvOURSTASH(*out_name_sv),
            1,  /* fake */
-           0   /* not a state variable */
+           SvPAD_STATE(*out_name_sv) ? 1 : 0 /* state variable ? */
        );
 
        new_namesv = AvARRAY(PL_comppad_name)[new_offset];
@@ -1457,8 +1460,7 @@ Perl_cv_clone(pTHX_ CV *proto)
     ENTER;
     SAVESPTR(PL_compcv);
 
-    cv = PL_compcv = (CV*)newSV(0);
-    sv_upgrade((SV *)cv, SvTYPE(proto));
+    cv = PL_compcv = (CV*)newSV_type(SvTYPE(proto));
     CvFLAGS(cv) = CvFLAGS(proto) & ~(CVf_CLONE|CVf_WEAKOUTSIDE);
     CvCLONED_on(cv);
 
@@ -1497,17 +1499,17 @@ Perl_cv_clone(pTHX_ CV *proto)
            if (SvFAKE(namesv)) {   /* lexical from outside? */
                sv = outpad[PARENT_PAD_INDEX(namesv)];
                assert(sv);
-               /* formats may have an inactive parent */
-               if (SvTYPE(proto) == SVt_PVFM && SvPADSTALE(sv)) {
+               /* formats may have an inactive parent,
+                  while my $x if $false can leave an active var marked as
+                  stale. And state vars are always available */
+               if (SvPADSTALE(sv) && !SvPAD_STATE(namesv)) {
                    if (ckWARN(WARN_CLOSURE))
                        Perl_warner(aTHX_ packWARN(WARN_CLOSURE),
                            "Variable \"%s\" is not available", SvPVX_const(namesv));
                    sv = NULL;
                }
-               else {
-                   assert(!SvPADSTALE(sv));
+               else 
                    SvREFCNT_inc_simple_void_NN(sv);
-               }
            }
            if (!sv) {
                 const char sigil = SvPVX_const(namesv)[0];
@@ -1520,6 +1522,9 @@ Perl_cv_clone(pTHX_ CV *proto)
                else
                    sv = newSV(0);
                SvPADMY_on(sv);
+               /* reset the 'assign only once' flag on each state var */
+               if (SvPAD_STATE(namesv))
+                   SvPADSTALE_on(sv);
            }
        }
        else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
@@ -1622,7 +1627,10 @@ Perl_pad_push(pTHX_ PADLIST *padlist, int depth)
        for ( ;ix > 0; ix--) {
            if (names_fill >= ix && names[ix] != &PL_sv_undef) {
                const char sigil = SvPVX_const(names[ix])[0];
-               if ((SvFLAGS(names[ix]) & SVf_FAKE) || sigil == '&') {
+               if ((SvFLAGS(names[ix]) & SVf_FAKE)
+                       || (SvFLAGS(names[ix]) & SVpad_STATE)
+                       || sigil == '&')
+               {
                    /* outer lexical or anon code */
                    av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
                }