/* Destructor */
+/*
+=for apidoc Am|void|op_free|OP *o
+
+Free an op. Only use this when an op is no longer linked to from any optree.
+
+=cut
+*/
+
void
Perl_op_free(pTHX_ OP *o)
{
}
}
+/*
+=for apidoc Am|void|op_null|OP *o
+
+Neutralizes an op when it is no longer needed, but is still linked to from
+other ops.
+
+=cut
+*/
+
void
Perl_op_null(pTHX_ OP *o)
{
=head1 Optree Manipulation Functions
=for apidoc Am|OP*|op_linklist|OP *o
-This function is the implementation of the L</LINKLIST> macro. It should
+This function is the implementation of the L</LINKLIST> macro. It should
not be called directly.
=cut
}
static void
+S_op_pretty(pTHX_ const OP *o, SV **retsv, const char **retpv)
+{ /* or not so pretty :-) */
+ if (o->op_type == OP_CONST) {
+ *retsv = cSVOPo_sv;
+ if (SvPOK(*retsv)) {
+ SV *sv = *retsv;
+ *retsv = sv_newmortal();
+ pv_pretty(*retsv, SvPVX_const(sv), SvCUR(sv), 32, NULL, NULL,
+ PERL_PV_PRETTY_DUMP |PERL_PV_ESCAPE_UNI_DETECT);
+ }
+ else if (!SvOK(*retsv))
+ *retpv = "undef";
+ }
+ else *retpv = "...";
+}
+
+static void
S_scalar_slice_warning(pTHX_ const OP *o)
{
OP *kid;
const char lbrack =
- o->op_type == OP_KVHSLICE || o->op_type == OP_HSLICE ? '{' : '[';
+ o->op_type == OP_HSLICE ? '{' : '[';
const char rbrack =
- o->op_type == OP_KVHSLICE || o->op_type == OP_HSLICE ? '}' : ']';
- const char funny =
- o->op_type == OP_ASLICE || o->op_type == OP_HSLICE ? '@' : '%';
+ o->op_type == OP_HSLICE ? '}' : ']';
SV *name;
- SV *keysv;
+ SV *keysv = NULL; /* just to silence compiler warnings */
const char *key = NULL;
if (!(o->op_private & OPpSLICEWARNING))
name = S_op_varname(aTHX_ kid->op_sibling);
if (!name) /* XS module fiddling with the op tree */
return;
- if (kid->op_type == OP_CONST) {
- keysv = kSVOP_sv;
- if (SvPOK(kSVOP_sv)) {
- SV *sv = keysv;
- keysv = sv_newmortal();
- pv_pretty(keysv, SvPVX_const(sv), SvCUR(sv), 32, NULL, NULL,
- PERL_PV_PRETTY_DUMP |PERL_PV_ESCAPE_UNI_DETECT);
- }
- else if (!SvOK(keysv))
- key = "undef";
- }
- else key = "...";
+ S_op_pretty(aTHX_ kid, &keysv, &key);
assert(SvPOK(name));
sv_chop(name,SvPVX(name)+1);
if (key)
- /* diag_listed_as: Scalar value %%s[%s] better written as $%s[%s] */
+ /* diag_listed_as: Scalar value @%s[%s] better written as $%s[%s] */
Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
- "Scalar value %c%"SVf"%c%s%c better written as $%"SVf
+ "Scalar value @%"SVf"%c%s%c better written as $%"SVf
"%c%s%c",
- funny, SVfARG(name), lbrack, key, rbrack, SVfARG(name),
+ SVfARG(name), lbrack, key, rbrack, SVfARG(name),
lbrack, key, rbrack);
else
- /* diag_listed_as: Scalar value %%s[%s] better written as $%s[%s] */
+ /* diag_listed_as: Scalar value @%s[%s] better written as $%s[%s] */
Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
- "Scalar value %c%"SVf"%c%"SVf"%c better written as $%"
+ "Scalar value @%"SVf"%c%"SVf"%c better written as $%"
SVf"%c%"SVf"%c",
- funny, SVfARG(name), lbrack, keysv, rbrack,
+ SVfARG(name), lbrack, keysv, rbrack,
SVfARG(name), lbrack, keysv, rbrack);
}
break;
case OP_KVHSLICE:
case OP_KVASLICE:
- S_scalar_slice_warning(aTHX_ o);
+ {
+ /* Warn about scalar context */
+ const char lbrack = o->op_type == OP_KVHSLICE ? '{' : '[';
+ const char rbrack = o->op_type == OP_KVHSLICE ? '}' : ']';
+ SV *name;
+ SV *keysv;
+ const char *key = NULL;
+
+ /* This warning can be nonsensical when there is a syntax error. */
+ if (PL_parser && PL_parser->error_count)
+ break;
+
+ if (!ckWARN(WARN_SYNTAX)) break;
+
+ kid = cLISTOPo->op_first;
+ kid = kid->op_sibling; /* get past pushmark */
+ assert(kid->op_sibling);
+ name = S_op_varname(aTHX_ kid->op_sibling);
+ if (!name) /* XS module fiddling with the op tree */
+ break;
+ S_op_pretty(aTHX_ kid, &keysv, &key);
+ assert(SvPOK(name));
+ sv_chop(name,SvPVX(name)+1);
+ if (key)
+ /* diag_listed_as: %%s[%s] in scalar context better written as $%s[%s] */
+ Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
+ "%%%"SVf"%c%s%c in scalar context better written "
+ "as $%"SVf"%c%s%c",
+ SVfARG(name), lbrack, key, rbrack, SVfARG(name),
+ lbrack, key, rbrack);
+ else
+ /* diag_listed_as: %%s[%s] in scalar context better written as $%s[%s] */
+ Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
+ "%%%"SVf"%c%"SVf"%c in scalar context better "
+ "written as $%"SVf"%c%"SVf"%c",
+ SVfARG(name), lbrack, keysv, rbrack,
+ SVfARG(name), lbrack, keysv, rbrack);
+ }
}
return o;
}
/*
=for apidoc finalize_optree
-This function finalizes the optree. Should be called directly after
-the complete optree is built. It does some additional
+This function finalizes the optree. Should be called directly after
+the complete optree is built. It does some additional
checking which can't be done in the normal ck_xxx functions and makes
the tree thread-safe.
UNOP *rop;
SV *lexname;
GV **fields;
- SV **svp, *sv;
SVOP *key_op;
OP *kid;
bool check_fields;
case OP_HSLICE:
S_scalar_slice_warning(aTHX_ o);
+ case OP_KVHSLICE:
if (/* I bet there's always a pushmark... */
(kid = cLISTOPo->op_first->op_sibling)->op_type != OP_LIST
&& kid->op_type != OP_CONST)
rop = NULL;
}
+ lexname = NULL; /* just to silence compiler warnings */
+ fields = NULL; /* just to silence compiler warnings */
+
check_fields =
rop
&& (lexname = *av_fetch(PL_comppad_name, rop->op_targ, TRUE),
the lvalue op).
This function detects things that can't be modified, such as C<$x+1>, and
-generates errors for them. For example, C<$x+1 = 2> would cause it to be
+generates errors for them. For example, C<$x+1 = 2> would cause it to be
called with an op of type OP_ADD and a C<type> argument of OP_SASSIGN.
It also flags things that need to behave specially in an lvalue context,
PERL_ARGS_ASSERT_APPLY_ATTRS;
/* fake up C<use attributes $pkg,$rv,@attrs> */
- ENTER; /* need to protect against side-effects of 'use' */
#define ATTRSMODULE "attributes"
#define ATTRSMODULE_PM "attributes.pm"
newSVOP(OP_CONST, 0,
newRV(target)),
dup_attrlist(attrs))));
- LEAVE;
}
STATIC void
target->op_type == OP_PADAV);
/* Ensure that attributes.pm is loaded. */
- ENTER; /* need to protect against side-effects of 'use' */
/* Don't force the C<use> if we don't need it. */
svp = hv_fetchs(GvHVn(PL_incgv), ATTRSMODULE_PM, FALSE);
if (svp && *svp != &PL_sv_undef)
else
Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
newSVpvs(ATTRSMODULE), NULL);
- LEAVE;
/* Need package name for method call. */
pack = newSVOP(OP_CONST, 0, newSVpvs(ATTRSMODULE));
}
}
+static void
+S_cant_declare(pTHX_ OP *o)
+{
+ if (o->op_type == OP_NULL
+ && (o->op_flags & (OPf_SPECIAL|OPf_KIDS)) == OPf_KIDS)
+ o = cUNOPo->op_first;
+ yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
+ o->op_type == OP_NULL
+ && o->op_flags & OPf_SPECIAL
+ ? "do block"
+ : OP_DESC(o),
+ PL_parser->in_my == KEY_our ? "our" :
+ PL_parser->in_my == KEY_state ? "state" :
+ "my"));
+}
+
STATIC OP *
S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp)
{
type == OP_RV2AV ||
type == OP_RV2HV) { /* XXX does this let anything illegal in? */
if (cUNOPo->op_first->op_type != OP_GV) { /* MJD 20011224 */
- yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
- OP_DESC(o),
- PL_parser->in_my == KEY_our
- ? "our"
- : PL_parser->in_my == KEY_state ? "state" : "my"));
+ S_cant_declare(aTHX_ o);
} else if (attrs) {
GV * const gv = cGVOPx_gv(cUNOPo->op_first);
PL_parser->in_my = FALSE;
type != OP_PADHV &&
type != OP_PUSHMARK)
{
- yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
- OP_DESC(o),
- PL_parser->in_my == KEY_our
- ? "our"
- : PL_parser->in_my == KEY_state ? "state" : "my"));
+ S_cant_declare(aTHX_ o);
return o;
}
else if (attrs && type != OP_PUSHMARK) {
/* !~ doesn't make sense with /r, so error on it for now */
if (rtype == OP_SUBST && (cPMOPx(right)->op_pmflags & PMf_NONDESTRUCT) &&
type == OP_NOT)
+ /* diag_listed_as: Using !~ with %s doesn't make sense */
yyerror("Using !~ with s///r doesn't make sense");
if (rtype == OP_TRANSR && type == OP_NOT)
+ /* diag_listed_as: Using !~ with %s doesn't make sense */
yyerror("Using !~ with tr///r doesn't make sense");
ismatchop = (rtype == OP_MATCH ||
=for apidoc Aox||blockhook_register
Register a set of hooks to be called when the Perl lexical scope changes
-at compile time. See L<perlguts/"Compile-time scope hooks">.
+at compile time.
See L<perlguts/"Compile-time scope hooks">.
=cut
*/
#endif
assert(sv);
if (type == OP_STRINGIFY) SvPADTMP_off(sv);
- else if (!SvIMMORTAL(sv)) SvPADTMP_on(sv);
+ else if (!SvIMMORTAL(sv)) {
+ SvPADTMP_on(sv);
+ SvREADONLY_on(sv);
+ }
if (type == OP_RV2GV)
newop = newGVOP(OP_GV, 0, MUTABLE_GV(sv));
else
((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, (SV *)av);
if (AvFILLp(av) != -1)
for (svp = AvARRAY(av) + AvFILLp(av); svp >= AvARRAY(av); --svp)
+ {
SvPADTMP_on(*svp);
+ SvREADONLY_on(*svp);
+ }
#ifdef PERL_MAD
op_getmad(curop,o,'O');
#else
dVAR;
BINOP *binop;
- assert((PL_opargs[type] & OA_CLASS_MASK) == OA_BINOP
+ ASSUME((PL_opargs[type] & OA_CLASS_MASK) == OA_BINOP
|| type == OP_SASSIGN || type == OP_NULL );
NewOp(1101, binop, 1, BINOP);
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 and not NULL, 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
* that it has a PL_parser to play with while doing that, and also
* that it doesn't mess with any existing parser, by creating a tmp
* new parser with lex_start(). This won't actually be used for much,
- * since pp_require() will create another parser for the real work. */
+ * since pp_require() will create another parser for the real work.
+ * The ENTER/LEAVE pair protect callers from any side effects of use. */
ENTER;
SAVEVPTR(PL_curcop);
LEAVE;
}
+PERL_STATIC_INLINE OP *
+S_new_entersubop(pTHX_ GV *gv, OP *arg)
+{
+ return newUNOP(OP_ENTERSUB, OPf_STACKED,
+ newLISTOP(OP_LIST, 0, arg,
+ newUNOP(OP_RV2CV, 0,
+ newGVOP(OP_GV, 0, gv))));
+}
+
OP *
Perl_dofile(pTHX_ OP *term, I32 force_builtin)
{
PERL_ARGS_ASSERT_DOFILE;
if (!force_builtin && (gv = gv_override("do", 2))) {
- doop = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, term,
- scalar(newUNOP(OP_RV2CV, 0,
- newGVOP(OP_GV, 0, gv)))));
+ doop = S_new_entersubop(aTHX_ gv, term);
}
else {
doop = newUNOP(OP_DOFILE, 0, scalar(term));
#ifdef NATIVE_HINTS
cop->op_private |= NATIVE_HINTS;
#endif
+#ifdef VMS
+ if (VMSISH_HUSHED) cop->op_private |= OPpHUSH_VMSISH;
+#endif
cop->op_next = (OP*)cop;
cop->cop_seq = seq;
OP* listop;
OP* o;
const bool once = block && block->op_flags & OPf_SPECIAL &&
- (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
+ block->op_type == OP_NULL;
PERL_UNUSED_ARG(debuggable);
if (expr) {
- if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
+ if (once && (
+ (expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
+ || ( expr->op_type == OP_NOT
+ && cUNOPx(expr)->op_first->op_type == OP_CONST
+ && SvTRUE(cSVOPx_sv(cUNOPx(expr)->op_first))
+ )
+ ))
+ /* Return the block now, so that S_new_logop does not try to
+ fold it away. */
return block; /* do {} while 0 does once */
if (expr->op_type == OP_READLINE
|| expr->op_type == OP_READDIR
listop = op_append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
o = new_logop(OP_AND, 0, &expr, &listop);
+ if (once) {
+ ASSUME(listop);
+ }
+
if (listop)
((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
if (once && o != listop)
+ {
+ assert(cUNOPo->op_first->op_type == OP_AND
+ || cUNOPo->op_first->op_type == OP_OR);
o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
+ }
if (o == listop)
o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
=for apidoc cv_const_sv
-If C<cv> is a constant sub eligible for inlining. returns the constant
+If C<cv> is a constant sub eligible for inlining, returns the constant
value returned by the sub. Otherwise, returns NULL.
Constant subs can be created with C<newCONSTSUB> or as described in
#endif
{
/* (PL_madskills unset in used file.) */
- SvREFCNT_dec(cv);
+ SAVEFREESV(cv);
}
return TRUE;
}
cv_ckproto_len_flags(cv, (GV *)name, ps, ps_len, ps_utf8);
/* already defined? */
if (exists) {
- if (S_already_defined(aTHX_ cv, block, NULL, name, &const_sv))
+ if (S_already_defined(aTHX_ cv,block,NULL,name,&const_sv))
cv = NULL;
else {
if (attrs) goto attrs;
return cv;
}
+/* _x = extended */
CV *
-Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
-{
- return newATTRSUB_flags(floor, o, proto, attrs, block, 0);
-}
-
-CV *
-Perl_newATTRSUB_flags(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs,
- OP *block, U32 flags)
+Perl_newATTRSUB_x(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs,
+ OP *block, bool o_is_gv)
{
dVAR;
GV *gv;
|| PL_madskills)
? GV_ADDMULTI : GV_ADDMULTI | GV_NOINIT;
STRLEN namlen = 0;
- const bool o_is_gv = flags & 1;
const char * const name =
o ? SvPV_const(o_is_gv ? (SV *)o : cSVOPo->op_sv, namlen) : NULL;
bool has_name;
if (*name == 'B') {
if (strEQ(name, "BEGIN")) {
const I32 oldscope = PL_scopestack_ix;
+ dSP;
if (floor) LEAVE_SCOPE(floor);
ENTER;
+ PUSHSTACKi(PERLSI_REQUIRE);
SAVECOPFILE(&PL_compiling);
SAVECOPLINE(&PL_compiling);
SAVEVPTR(PL_curcop);
GvCV_set(gv,0); /* cv has been hijacked */
call_list(oldscope, PL_beginav);
+ POPSTACK;
LEAVE;
}
else
U32 flags)
{
CV *cv;
+ bool interleave = FALSE;
PERL_ARGS_ASSERT_NEWXS_LEN_FLAGS;
),
cv, const_svp);
}
- SvREFCNT_dec_NN(cv);
+ interleave = TRUE;
+ ENTER;
+ SAVEFREESV(cv);
cv = NULL;
}
}
CvDYNFILE_on(cv);
}
sv_setpv(MUTABLE_SV(cv), proto);
+ if (interleave) LEAVE;
return cv;
}
return o;
}
+static void
+S_io_hints(pTHX_ OP *o)
+{
+ HV * const table =
+ PL_hints & HINT_LOCALIZE_HH ? GvHV(PL_hintgv) : NULL;;
+ if (table) {
+ SV **svp = hv_fetchs(table, "open_IN", FALSE);
+ if (svp && *svp) {
+ STRLEN len = 0;
+ const char *d = SvPV_const(*svp, len);
+ const I32 mode = mode_from_discipline(d, len);
+ if (mode & O_BINARY)
+ o->op_private |= OPpOPEN_IN_RAW;
+ else if (mode & O_TEXT)
+ o->op_private |= OPpOPEN_IN_CRLF;
+ }
+
+ svp = hv_fetchs(table, "open_OUT", FALSE);
+ if (svp && *svp) {
+ STRLEN len = 0;
+ const char *d = SvPV_const(*svp, len);
+ const I32 mode = mode_from_discipline(d, len);
+ if (mode & O_BINARY)
+ o->op_private |= OPpOPEN_OUT_RAW;
+ else if (mode & O_TEXT)
+ o->op_private |= OPpOPEN_OUT_CRLF;
+ }
+ }
+}
+
+OP *
+Perl_ck_backtick(pTHX_ OP *o)
+{
+ GV *gv;
+ OP *newop = NULL;
+ PERL_ARGS_ASSERT_CK_BACKTICK;
+ /* qx and `` have a null pushmark; CORE::readpipe has only one kid. */
+ if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_sibling
+ && (gv = gv_override("readpipe",8))) {
+ newop = S_new_entersubop(aTHX_ gv, cUNOPo->op_first->op_sibling);
+ cUNOPo->op_first->op_sibling = NULL;
+ }
+ else if (!(o->op_flags & OPf_KIDS))
+ newop = newUNOP(OP_BACKTICK, 0, newDEFSVOP());
+ if (newop) {
+#ifdef PERL_MAD
+ op_getmad(o,newop,'O');
+#else
+ op_free(o);
+#endif
+ return newop;
+ }
+ S_io_hints(aTHX_ o);
+ return o;
+}
+
OP *
Perl_ck_bitop(pTHX_ OP *o)
{
}
OP *
-Perl_ck_die(pTHX_ OP *o)
-{
- PERL_ARGS_ASSERT_CK_DIE;
-
-#ifdef VMS
- if (VMSISH_HUSHED) o->op_private |= OPpHUSH_VMSISH;
-#endif
- return ck_fun(o);
-}
-
-OP *
Perl_ck_eof(pTHX_ OP *o)
{
dVAR;
}
OP *
-Perl_ck_exit(pTHX_ OP *o)
-{
- PERL_ARGS_ASSERT_CK_EXIT;
-
-#ifdef VMS
- HV * const table = GvHV(PL_hintgv);
- if (table) {
- SV * const * const svp = hv_fetchs(table, "vmsish_exit", FALSE);
- if (svp && *svp && SvTRUE(*svp))
- o->op_private |= OPpEXIT_VMSISH;
- }
- if (VMSISH_HUSHED) o->op_private |= OPpHUSH_VMSISH;
-#endif
- return ck_fun(o);
-}
-
-OP *
Perl_ck_exec(pTHX_ OP *o)
{
PERL_ARGS_ASSERT_CK_EXEC;
{
return too_many_arguments_pv(o,PL_op_desc[type], 0);
}
- scalar(kid);
+ if (type != OP_DELETE) scalar(kid);
break;
case OA_LIST:
if (oa < 16) {
/* Defer checks to run-time if we have a scalar arg */
if (kid->op_type == OP_RV2AV || kid->op_type == OP_PADAV)
op_lvalue(kid, type);
- else scalar(kid);
+ else {
+ scalar(kid);
+ /* diag_listed_as: push on reference is experimental */
+ Perl_ck_warner_d(aTHX_
+ packWARN(WARN_EXPERIMENTAL__AUTODEREF),
+ "%s on reference is experimental",
+ PL_op_desc[type]);
+ }
break;
case OA_HVREF:
if (kid->op_type == OP_CONST &&
*/
o->op_flags |= OPf_SPECIAL;
o->op_targ = pad_alloc(OP_GLOB, SVs_PADTMP);
- o = newLISTOP(OP_LIST, 0, o, NULL);
- o = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, o,
- scalar(newUNOP(OP_RV2CV, 0,
- newGVOP(OP_GV, 0, gv)))));
+ o = S_new_entersubop(aTHX_ gv, o);
o = newUNOP(OP_NULL, 0, o);
o->op_targ = OP_GLOB; /* hint at what it used to be: eg in newWHILEOP */
return o;
Perl_ck_open(pTHX_ OP *o)
{
dVAR;
- HV * const table =
- PL_hints & HINT_LOCALIZE_HH ? GvHV(PL_hintgv) : NULL;;
PERL_ARGS_ASSERT_CK_OPEN;
- if (table) {
- SV **svp = hv_fetchs(table, "open_IN", FALSE);
- if (svp && *svp) {
- STRLEN len = 0;
- const char *d = SvPV_const(*svp, len);
- const I32 mode = mode_from_discipline(d, len);
- if (mode & O_BINARY)
- o->op_private |= OPpOPEN_IN_RAW;
- else if (mode & O_TEXT)
- o->op_private |= OPpOPEN_IN_CRLF;
- }
-
- svp = hv_fetchs(table, "open_OUT", FALSE);
- if (svp && *svp) {
- STRLEN len = 0;
- const char *d = SvPV_const(*svp, len);
- const I32 mode = mode_from_discipline(d, len);
- if (mode & O_BINARY)
- o->op_private |= OPpOPEN_OUT_RAW;
- else if (mode & O_TEXT)
- o->op_private |= OPpOPEN_OUT_CRLF;
- }
- }
- if (o->op_type == OP_BACKTICK) {
- if (!(o->op_flags & OPf_KIDS)) {
- OP * const newop = newUNOP(OP_BACKTICK, 0, newDEFSVOP());
-#ifdef PERL_MAD
- op_getmad(o,newop,'O');
-#else
- op_free(o);
-#endif
- return newop;
- }
- return o;
- }
+ S_io_hints(aTHX_ o);
{
/* In case of three-arg dup open remove strictness
* from the last arg if it is a bareword. */
#ifndef PERL_MAD
op_free(o);
#endif
- newop = newUNOP(OP_ENTERSUB, OPf_STACKED,
- op_append_elem(OP_LIST, kid,
- scalar(newUNOP(OP_RV2CV, 0,
- newGVOP(OP_GV, 0,
- gv)))));
+ newop = S_new_entersubop(aTHX_ gv, kid);
op_getmad(o,newop,'O');
return newop;
}
)
);
}
- assert(0);
+ NOT_REACHED;
}
else {
OP *prev, *cvop;
if (!SvREADONLY(sv) && !SvIsCOW(sv) && SvCANCOW(sv)) {
SvIsCOW_on(sv);
CowREFCNT(sv) = 0;
+# ifdef PERL_DEBUG_READONLY_COW
+ sv_buf_to_ro(sv);
+# endif
}
#endif
SvREADONLY_on(sv);
}
}
/* if treating as a reference, defer additional checks to runtime */
- return o->op_type == ref_type ? o : ck_fun(o);
+ if (o->op_type == ref_type) {
+ /* diag_listed_as: keys on reference is experimental */
+ Perl_ck_warner_d(aTHX_ packWARN(WARN_EXPERIMENTAL__AUTODEREF),
+ "%s is experimental", PL_op_desc[ref_type]);
+ return o;
+ }
+ return ck_fun(o);
}
OP *
defer_queue[(defer_base + ++defer_ix) % MAX_DEFERRED] = o; \
} STMT_END
+#define IS_AND_OP(o) (o->op_type == OP_AND)
+#define IS_OR_OP(o) (o->op_type == OP_OR)
+
/* A peephole optimizer. We visit the ops in the order they're to execute.
* See the comments at the top of this file for more details about when
* peep() is called */
case OP_NEXTSTATE:
PL_curcop = ((COP*)o); /* for warnings */
+ /* Optimise a "return ..." at the end of a sub to just be "...".
+ * This saves 2 ops. Before:
+ * 1 <;> nextstate(main 1 -e:1) v ->2
+ * 4 <@> return K ->5
+ * 2 <0> pushmark s ->3
+ * - <1> ex-rv2sv sK/1 ->4
+ * 3 <#> gvsv[*cat] s ->4
+ *
+ * After:
+ * - <@> return K ->-
+ * - <0> pushmark s ->2
+ * - <1> ex-rv2sv sK/1 ->-
+ * 2 <$> gvsv(*cat) s ->3
+ */
+ {
+ OP *next = o->op_next;
+ OP *sibling = o->op_sibling;
+ if ( OP_TYPE_IS(next, OP_PUSHMARK)
+ && OP_TYPE_IS(sibling, OP_RETURN)
+ && OP_TYPE_IS(sibling->op_next, OP_LINESEQ)
+ && OP_TYPE_IS(sibling->op_next->op_next, OP_LEAVESUB)
+ && cUNOPx(sibling)->op_first == next
+ && next->op_sibling && next->op_sibling->op_next
+ && next->op_next
+ ) {
+ /* Look through the PUSHMARK's siblings for one that
+ * points to the RETURN */
+ OP *top = next->op_sibling;
+ while (top && top->op_next) {
+ if (top->op_next == sibling) {
+ top->op_next = sibling->op_next;
+ o->op_next = next->op_next;
+ break;
+ }
+ top = top->op_sibling;
+ }
+ }
+ }
+
+ /* Optimise 'my $x; my $y;' into 'my ($x, $y);'
+ *
+ * This latter form is then suitable for conversion into padrange
+ * later on. Convert:
+ *
+ * nextstate1 -> padop1 -> nextstate2 -> padop2 -> nextstate3
+ *
+ * into:
+ *
+ * nextstate1 -> listop -> nextstate3
+ * / \
+ * pushmark -> padop1 -> padop2
+ */
+ if (o->op_next && (
+ o->op_next->op_type == OP_PADSV
+ || o->op_next->op_type == OP_PADAV
+ || o->op_next->op_type == OP_PADHV
+ )
+ && !(o->op_next->op_private & ~OPpLVAL_INTRO)
+ && o->op_next->op_next && o->op_next->op_next->op_type == OP_NEXTSTATE
+ && o->op_next->op_next->op_next && (
+ o->op_next->op_next->op_next->op_type == OP_PADSV
+ || o->op_next->op_next->op_next->op_type == OP_PADAV
+ || o->op_next->op_next->op_next->op_type == OP_PADHV
+ )
+ && !(o->op_next->op_next->op_next->op_private & ~OPpLVAL_INTRO)
+ && o->op_next->op_next->op_next->op_next && o->op_next->op_next->op_next->op_next->op_type == OP_NEXTSTATE
+ && (!CopLABEL((COP*)o)) /* Don't mess with labels */
+ && (!CopLABEL((COP*)o->op_next->op_next)) /* ... */
+ ) {
+ OP *first;
+ OP *last;
+ OP *newop;
+
+ first = o->op_next;
+ last = o->op_next->op_next->op_next;
+
+ newop = newLISTOP(OP_LIST, 0, first, last);
+ newop->op_flags |= OPf_PARENS;
+ newop->op_flags = (newop->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
+
+ /* Kill nextstate2 between padop1/padop2 */
+ op_free(first->op_next);
+
+ first->op_next = last; /* padop2 */
+ first->op_sibling = last; /* ... */
+ o->op_next = cUNOPx(newop)->op_first; /* pushmark */
+ o->op_next->op_next = first; /* padop1 */
+ o->op_next->op_sibling = first; /* ... */
+ newop->op_next = last->op_next; /* nextstate3 */
+ newop->op_sibling = last->op_sibling;
+ last->op_next = newop; /* listop */
+ last->op_sibling = NULL;
+ o->op_sibling = newop; /* ... */
+
+ newop->op_flags = (newop->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
+
+ /* Ensure pushmark has this flag if padops do */
+ if (first->op_flags & OPf_MOD && last->op_flags & OPf_MOD) {
+ o->op_next->op_flags |= OPf_MOD;
+ }
+
+ break;
+ }
+
/* Two NEXTSTATEs in a row serve no purpose. Except if they happen
to carry two labels. For now, take the easier option, and skip
this optimisation if the first NEXTSTATE has a label. */
)
break;
- /* let $a[N] potentially be optimised into ALEMFAST_LEX
+ /* let $a[N] potentially be optimised into AELEMFAST_LEX
* instead */
if ( p->op_type == OP_PADAV
&& p->op_next
while (o->op_next && ( o->op_type == o->op_next->op_type
|| o->op_next->op_type == OP_NULL))
o->op_next = o->op_next->op_next;
+
+ /* if we're an OR and our next is a AND in void context, we'll
+ follow it's op_other on short circuit, same for reverse.
+ We can't do this with OP_DOR since if it's true, its return
+ value is the underlying value which must be evaluated
+ by the next op */
+ if (o->op_next &&
+ (
+ (IS_AND_OP(o) && IS_OR_OP(o->op_next))
+ || (IS_OR_OP(o) && IS_AND_OP(o->op_next))
+ )
+ && (o->op_next->op_flags & OPf_WANT) == OPf_WANT_VOID
+ ) {
+ o->op_next = ((LOGOP*)o->op_next)->op_other;
+ }
DEFER(cLOGOP->op_other);
o->op_opt = 1;
case OP_CUSTOM: {
Perl_cpeep_t cpeep =
- XopENTRY(Perl_custom_op_xop(aTHX_ o), xop_peep);
+ XopENTRYCUSTOM(o, xop_peep);
if (cpeep)
cpeep(aTHX_ o, oldop);
break;
=head1 Custom Operators
=for apidoc Ao||custom_op_xop
-Return the XOP structure for a given custom op. This function should be
+Return the XOP structure for a given custom op. This macro should be
considered internal to OP_NAME and the other access macros: use them instead.
+This macro does call a function. Prior
+to 5.19.9, this was implemented as a
+function.
=cut
*/
-const XOP *
-Perl_custom_op_xop(pTHX_ const OP *o)
+XOPRETANY
+Perl_custom_op_get_field(pTHX_ const OP *o, const xop_flags_enum field)
{
SV *keysv;
HE *he = NULL;
static const XOP xop_null = { 0, 0, 0, 0, 0 };
- PERL_ARGS_ASSERT_CUSTOM_OP_XOP;
+ PERL_ARGS_ASSERT_CUSTOM_OP_GET_FIELD;
assert(o->op_type == OP_CUSTOM);
/* This is wrong. It assumes a function pointer can be cast to IV,
XopENTRY_set(xop, xop_desc, savepvn(pv, l));
}
Perl_custom_op_register(aTHX_ o->op_ppaddr, xop);
- return xop;
}
-
- if (!he) return &xop_null;
-
- xop = INT2PTR(XOP *, SvIV(HeVAL(he)));
- return xop;
+ else {
+ if (!he)
+ xop = (XOP *)&xop_null;
+ else
+ xop = INT2PTR(XOP *, SvIV(HeVAL(he)));
+ }
+ {
+ XOPRETANY any;
+ if(field == XOPe_xop_ptr) {
+ any.xop_ptr = xop;
+ } else {
+ const U32 flags = XopFLAGS(xop);
+ if(flags & field) {
+ switch(field) {
+ case XOPe_xop_name:
+ any.xop_name = xop->xop_name;
+ break;
+ case XOPe_xop_desc:
+ any.xop_desc = xop->xop_desc;
+ break;
+ case XOPe_xop_class:
+ any.xop_class = xop->xop_class;
+ break;
+ case XOPe_xop_peep:
+ any.xop_peep = xop->xop_peep;
+ break;
+ default:
+ NOT_REACHED;
+ break;
+ }
+ } else {
+ switch(field) {
+ case XOPe_xop_name:
+ any.xop_name = XOPd_xop_name;
+ break;
+ case XOPe_xop_desc:
+ any.xop_desc = XOPd_xop_desc;
+ break;
+ case XOPe_xop_class:
+ any.xop_class = XOPd_xop_class;
+ break;
+ case XOPe_xop_peep:
+ any.xop_peep = XOPd_xop_peep;
+ break;
+ default:
+ NOT_REACHED;
+ break;
+ }
+ }
+ }
+ return any;
+ }
}
/*
=for apidoc Ao||custom_op_register
-Register a custom op. See L<perlguts/"Custom Operators">.
+Register a custom op.
See L<perlguts/"Custom Operators">.
=cut
*/
This function assigns the prototype of the named core function to C<sv>, or
to a new mortal SV if C<sv> is NULL. It returns the modified C<sv>, or
NULL if the core function has no prototype. C<code> is a code as returned
-by C<keyword()>. It must not be equal to 0 or -KEY_CORE.
+by C<keyword()>. It must not be equal to 0.
=cut
*/
PERL_ARGS_ASSERT_CORE_PROTOTYPE;
- assert (code && code != -KEY_CORE);
+ assert (code);
if (!sv) sv = sv_newmortal();
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