/* Names of length 1. (Or 0. But name is NUL terminated, so that will
be case '\0' in this switch statement (ie a default case) */
switch (*name) {
- case '&':
- case '`':
- case '\'':
+ case '&': /* $& */
+ case '`': /* $` */
+ case '\'': /* $' */
if (
sv_type == SVt_PVAV ||
sv_type == SVt_PVHV ||
PL_sawampersand = TRUE;
goto magicalize;
- case ':':
+ case ':': /* $: */
sv_setpv(GvSVn(gv),PL_chopset);
goto magicalize;
- case '?':
+ case '?': /* $? */
#ifdef COMPLEX_STATUS
SvUPGRADE(GvSVn(gv), SVt_PVLV);
#endif
goto magicalize;
- case '!':
+ case '!': /* $! */
GvMULTI_on(gv);
/* If %! has been used, automatically load Errno.pm. */
require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
break;
- case '-':
- case '+':
+ case '-': /* $- */
+ case '+': /* $+ */
GvMULTI_on(gv); /* no used once warnings here */
{
AV* const av = GvAVn(gv);
break;
}
- case '*':
- case '#':
+ case '*': /* $* */
+ case '#': /* $# */
if (sv_type == SVt_PV)
Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
"$%c is no longer supported", *name);
break;
- case '|':
+ case '|': /* $| */
sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
goto magicalize;
ro_magicalize:
SvREADONLY_on(GvSVn(gv));
/* FALL THROUGH */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '[':
- case '^':
- case '~':
- case '=':
- case '%':
- case '.':
- case '(':
- case ')':
- case '<':
- case '>':
- case '\\':
- case '/':
+ case '0': /* $0 */
+ case '1': /* $1 */
+ case '2': /* $2 */
+ case '3': /* $3 */
+ case '4': /* $4 */
+ case '5': /* $5 */
+ case '6': /* $6 */
+ case '7': /* $7 */
+ case '8': /* $8 */
+ case '9': /* $9 */
+ case '[': /* $[ */
+ case '^': /* $^ */
+ case '~': /* $~ */
+ case '=': /* $= */
+ case '%': /* $% */
+ case '.': /* $. */
+ case '(': /* $( */
+ case ')': /* $) */
+ case '<': /* $< */
+ case '>': /* $> */
+ case '\\': /* $\ */
+ case '/': /* $/ */
case '\001': /* $^A */
case '\003': /* $^C */
case '\004': /* $^D */
sv_setpvs(GvSVn(gv),"\f");
PL_formfeed = GvSVn(gv);
break;
- case ';':
+ case ';': /* $; */
sv_setpvs(GvSVn(gv),"\034");
break;
- case ']':
+ case ']': /* $] */
{
SV * const sv = GvSVn(gv);
if (!sv_derived_from(PL_patchlevel, "version"))
(void)((cv = cvp[off=bool__amg])
|| (cv = cvp[off=numer_amg])
|| (cv = cvp[off=string_amg]));
- postpr = 1;
+ if (cv)
+ postpr = 1;
break;
case copy_amg:
{
case ge_amg:
case eq_amg:
case ne_amg:
- postpr = 1; off=ncmp_amg; break;
+ off = ncmp_amg;
+ break;
case slt_amg:
case sle_amg:
case sgt_amg:
case sge_amg:
case seq_amg:
case sne_amg:
- postpr = 1; off=scmp_amg; break;
+ off = scmp_amg;
+ break;
}
- if (off != -1) cv = cvp[off];
- if (!cv) {
- goto not_found;
- }
+ if ((off != -1) && (cv = cvp[off]))
+ postpr = 1;
+ else
+ goto not_found;
} else {
not_found: /* No method found, either report or croak */
switch (method) {
- case lt_amg:
- case le_amg:
- case gt_amg:
- case ge_amg:
- case eq_amg:
- case ne_amg:
- case slt_amg:
- case sle_amg:
- case sgt_amg:
- case sge_amg:
- case seq_amg:
- case sne_amg:
- postpr = 0; break;
case to_sv_amg:
case to_av_amg:
case to_hv_amg:
}
/*
+=for apidoc gv_try_downgrade
+
+If the typeglob C<gv> can be expressed more succinctly, by having
+something other than a real GV in its place in the stash, replace it
+with the optimised form. Basic requirements for this are that C<gv>
+is a real typeglob, is sufficiently ordinary, and is only referenced
+from its package. This function is meant to be used when a GV has been
+looked up in part to see what was there, causing upgrading, but based
+on what was found it turns out that the real GV isn't required after all.
+
+If C<gv> is a completely empty typeglob, it is deleted from the stash.
+
+If C<gv> is a typeglob containing only a sufficiently-ordinary constant
+sub, the typeglob is replaced with a scalar-reference placeholder that
+more compactly represents the same thing.
+
+=cut
+*/
+
+void
+Perl_gv_try_downgrade(pTHX_ GV *gv)
+{
+ HV *stash;
+ CV *cv;
+ HEK *namehek;
+ SV **gvp;
+ PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
+ if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
+ !SvOBJECT(gv) && !SvMAGICAL(gv) && !SvREADONLY(gv) &&
+ isGV_with_GP(gv) && GvGP(gv) &&
+ !GvINTRO(gv) && GvREFCNT(gv) == 1 &&
+ !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
+ GvEGV(gv) == gv && (stash = GvSTASH(gv))))
+ return;
+ cv = GvCV(gv);
+ if (!cv) {
+ HEK *gvnhek = GvNAME_HEK(gv);
+ (void)hv_delete(stash, HEK_KEY(gvnhek),
+ HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD);
+ } else if (GvMULTI(gv) && cv &&
+ !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) &&
+ CvSTASH(cv) == stash && CvGV(cv) == gv &&
+ CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) &&
+ !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) &&
+ (namehek = GvNAME_HEK(gv)) &&
+ (gvp = hv_fetch(stash, HEK_KEY(namehek),
+ HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) &&
+ *gvp == (SV*)gv) {
+ SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr);
+ SvREFCNT(gv) = 0;
+ sv_clear((SV*)gv);
+ SvREFCNT(gv) = 1;
+ SvFLAGS(gv) = SVt_IV|SVf_ROK;
+ SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) -
+ STRUCT_OFFSET(XPVIV, xiv_iv));
+ SvRV_set(gv, value);
+ }
+}
+
+/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
projects / p5sagit/p5-mst-13.2.git / blobdiff