5 #define NEED_grok_number
6 #define NEED_grok_numeric_radix
7 #define NEED_newRV_noinc
8 #define NEED_newSVpvn_share
9 #define NEED_sv_2pv_flags
13 #define XSPROTO(name) void name(pTHX_ CV* cv)
17 #define gv_stashpvs(x, y) Perl_gv_stashpvn(aTHX_ STR_WITH_LEN(x), y)
21 * delegations and attribute helpers:
30 * I32 *type; // hash, array, whatever + vtable for operation
39 /* These two functions attach magic with no behavior to an SV.
41 * The stashed value is reference counted, and is destroyed when it's parent
42 * object is destroyed.
44 * This is used to keep a reference the the meta attribute from a generated
45 * method, and to cache the C struct based wrapper attached to the meta
49 STATIC MGVTBL null_mg_vtbl = {
63 #endif /* MGf_LOCAL */
66 STATIC MAGIC *stash_in_mg (pTHX_ SV *sv, SV *obj) {
67 MAGIC *mg = sv_magicext(sv, obj, PERL_MAGIC_ext, &null_mg_vtbl, NULL, 0 );
68 mg->mg_flags |= MGf_REFCOUNTED;
73 STATIC SV *get_stashed_in_mg(pTHX_ SV *sv) {
76 if (SvTYPE(sv) >= SVt_PVMG) {
77 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
78 if ((mg->mg_type == PERL_MAGIC_ext) && (mg->mg_virtual == &null_mg_vtbl))
96 /* The folloing data structures deal with type constraints */
98 /* this is an enum of the various kinds of constraint checking an attribute can
101 * tc_cv is the fallback behavior (simply applying the
102 * ->_compiled_type_constraint to the value, but other more optimal checks are
103 * implemented too. */
106 tc_none = 0, /* no type checking */
107 tc_type, /* a builtin type to be checked by check_sv_type */
108 tc_stash, /* a stash for a class, implements TypeConstraint::Class by comparing SvSTASH and then invoking C<isa> if necessary */
109 tc_cv, /* applies a code reference to the value and checks for truth */
110 tc_fptr, /* apply a C function pointer */
111 tc_enum /* TODO check that the value is in an allowed set of values (strings) */
114 /* this is a enum of builtin type check. They are handled in a switch statement
115 * in check_sv_type */
117 Any, /* or item, or bool */
123 GlobRef, /* SVt_PVGV */
124 ArrayRef, /* SVt_PVAV */
125 HashRef, /* SVt_PVHV */
126 CodeRef, /* SVt_PVCV */
129 FileHandle, /* TODO */
136 /* auxillary pointer/int union used for constraint checking */
138 TC type; /* the builtin type number for tc_type */
139 SV *sv; /* the cv for tc_cv, or the stash for tc_stash */
140 OP *op; /* TODO not used */
141 bool (*fptr)(pTHX_ SV *type_constraint, SV *sv); /* the function pointer for tc_fptr FIXME aux data? */
149 /* The folloing data structures deal with type default value generation */
151 /* This is an enum for the various types of default value behaviors an
152 * attribute can have */
155 default_none = 0, /* no default value */
156 default_normal, /* code reference or scalar */
157 default_builder, /* builder method */
158 default_type /* TODO enumerated type optimization (will call newHV, newAV etc to avoid calling a code ref for these simple cases) */
162 SV *sv; /* The default value, or a code ref to generate one. If builder then this sv is applied as a method (stringified) */
163 U32 type; /* TODO for default_type, should probably be one of SVt_PVAV/SVt_PVHV */
171 /* the ATTR struct contains all the meta data for a Moose::Meta::Attribute for
172 * a given meta instance
174 * flags determines the various behaviors
176 * This supports only one slot per attribute in the current implementation, but
177 * slot_sv could contain an array
179 * A list of XSUBs that rely on this attr struct are cross indexed in the cvs
180 * array, so that when the meta instance is destroyed the XSANY field will be
181 * cleared. This is done in delete_mi
185 /* pointer to the MI this attribute is a part of the meta instance struct */
188 U32 flags; /* slot type, TC behavior, coerce, weaken, (no default | default, builder + lazy), auto_deref */
190 /* slot access fields */
191 SV *slot_sv; /* value of the slot (currently always slot name) */
192 U32 slot_u32; /* for optimized access (precomputed hash, possibly something else) */
197 DEFAULT def; /* cv, value or other, depending on flags */
199 TC_CHECK tc_check; /* see TC_CHECK*/
200 SV *type_constraint; /* Moose::Meta::TypeConstraint object */
204 SV *writer; /* used by the initializer */
206 SV *meta_attr; /* the Moose::Meta::Attribute */
207 AV *cvs; /* an array of CVs which use this attr, see delete_mi */
210 /* the flags integer is mapped as follows
211 * instance misc reading writing
212 * 00000000 00000000 00000000 00000000
216 * ^ tc.sv is refcounted
223 * ^ def.sv is refcounted
226 * ^ attr is required TODO
228 * flags having to do with the instance layout (TODO, only hash supported for now)
229 * ^^^^^^^ if 0 then nothing special (just hash)? FIXME TBD
232 #define ATTR_INSTANCE_MASK 0xff000000
233 #define ATTR_READING_MASK 0x0000ff00
234 #define ATTR_WRITING_MASK 0x000000ff
236 #define ATTR_MASK_TYPE 0x7
238 #define ATTR_MASK_DEFAULT 0x700
239 #define ATTR_SHIFT_DEFAULT 8
241 #define ATTR_LAZY 0x800
242 #define ATTR_DEFREFCNT 0x1000
244 #define ATTR_COERCE 0x8
245 #define ATTR_TCREFCNT 0x10
246 #define ATTR_WEAK 0x20
247 #define ATTR_TRIGGER 0x40
249 #define ATTR_ISWEAK(attr) ( attr->flags & ATTR_WEAK )
250 #define ATTR_ISLAZY(attr) ( attr->flags & ATTR_LAZY )
251 #define ATTR_ISCOERCE(attr) ( attr->flags & ATTR_COERCE )
253 #define ATTR_TYPE(f) ( attr->flags & 0x7 )
254 #define ATTR_DEFAULT(f) ( ( attr->flags & ATTR_MASK_DEFAULT ) >> ATTR_SHIFT_DEFAULT )
256 #define ATTR_DUMB_READER(attr) !ATTR_IS_LAZY(attr)
257 #define ATTR_DUMB_WRITER(attr) ( ( attr->flags & ATTR_WRITING_MASK ) == 0 )
258 #define ATTR_DUMB_INSTANCE(attr) ( ( attr->flags & ATTR_INSTANCE_MASK ) == 0 )
262 /* This unused (TODO) vtable will implement the meta instance protocol in terms
263 * of function pointers to allow the XS accessors to be used with custom meta
264 * instances in the future.
266 * We'll need to define a default instance of this vtable that uses call_sv,
269 /* FIXME define a vtable that does call_sv for fallback meta instance protocol */
271 SV * (*get)(pTHX_ SV *self, ATTR *attr);
272 void (*set)(pTHX_ SV *self, ATTR *attr, SV *value);
273 bool * (*has)(pTHX_ SV *self, ATTR *attr);
274 SV * (*delete)(pTHX_ SV *self, ATTR *attr);
277 /* TODO this table describes the instance layout of the object. Not yet
282 /* these are not yet implemented */
290 /* this struct models the meta instance *and* meta attributes simultaneously.
291 * It is a cache of the meta attribute behaviors for a given class or subclass
292 * and can be parametrized on that level
295 * An object pointing to this structure is kept in a refcounted magic inside
296 * the meta instance it corresponds to. On C<invalidate_meta_instance> the meta
297 * instance is destroyed, causing the proxy object to be destroyed, deleting
298 * this structure, clearing the XSANY of all dependent attribute methods.
300 * The next invocation of an attribute method will eventually call get_attr,
301 * which will call C<get_meta_instance> on the metaclass (recreating it in the
302 * Class::MOP level), and cache a new MI struct inside it. Subsequent
303 * invocations of get_attr will then search the MI for an ATTR matching the
304 * meta_attribute of the attribute method */
308 /* slot access method */
309 instance_types type; /* TODO only hashes supported currently */
310 instance_vtbl *vtbl; /* TODO */
312 /* attr descriptors */
320 /* Moose::Meta::Instance level API */
321 STATIC SV *get_slot_lvalue(pTHX_ SV *self, ATTR *attr);
322 STATIC bool set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value);
323 STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr);
324 STATIC SV *create_instance(pTHX_ MI *mi);
325 STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr);
327 /* Moose::Meta::Attribute level API */
328 STATIC void attr_set_initial_value(pTHX_ SV *self, ATTR *attr, SV *value);
329 STATIC SV *attr_get_value(pTHX_ SV *self, ATTR *attr);
330 STATIC void attr_set_value(pTHX_ SV *self, ATTR *attr, SV *value);
331 STATIC SV *attr_clear_value(pTHX_ SV *self, ATTR *attr);
332 STATIC bool attr_has_value(pTHX_ SV *self, ATTR *attr);
333 STATIC SV *class_new_object(pTHX_ MI *mi, HV *params);
336 /* Moose::Meta::Attribute level API (XSUBs) */
337 STATIC CV *new_attr_method (pTHX_ SV *attr, XSPROTO(body), char *name);
338 STATIC XS(initializer); /* only used by attr_set_initial_value */
342 STATIC XS(predicate);
344 STATIC XS(new_object);
346 STATIC ATTR *define_attr(pTHX_ CV *cv);
349 /* This macro is used in the XS subs to set up the 'attr' variable.
351 * if XSANY is NULL then define_attr is called on the CV, to set the pointer
352 * to the ATTR struct.
354 #define dATTR ATTR *attr = (XSANY.any_i32 ? INT2PTR(ATTR *, (XSANY.any_i32)) : define_attr(aTHX_ cv))
360 /* these functions implement type constraint checking */
362 /* checks that the SV is a scalar ref */
363 STATIC bool check_is_scalar_ref(SV *sv) {
365 switch (SvTYPE(SvRV(sv))) {
379 /* checks that the SV is a ref to a certain SvTYPE, where type is in the table
381 STATIC bool check_reftype(TC type, SV *sv) {
401 croak("not a reftype %d\n", type);
404 return SvTYPE(SvRV(sv)) == svt;
407 /* checks whether an SV is of a certain class
408 * SvSTASH is first compared by pointer for efficiency */
409 STATIC bool check_sv_class(pTHX_ HV *stash, SV *sv) {
422 if (SvSTASH(rv) == stash)
429 XPUSHs(sv_2mortal(newSVpv(HvNAME_get(stash), 0)));
432 call_method("isa", G_SCALAR);
443 /* checks whether SV of of a known simple type. Most of the non parametrized
444 * Moose core types are implemented here */
445 STATIC bool check_sv_type (TC type, SV *sv) {
462 return (SvOK(sv) && !SvROK(sv));
464 #if (PERL_VERSION < 8) || (PERL_VERSION == 8 && PERL_SUBVERSION <5)
465 if (!SvPOK(sv) && !SvPOKp(sv))
466 return SvFLAGS(sv) & (SVf_NOK|SVp_NOK|SVf_IOK|SVp_IOK);
469 return looks_like_number(sv);
474 } else if ( SvPOK(sv) ) {
476 char *pv = SvPV(sv, len);
477 int flags = grok_number(pv, len, NULL);
478 return ( flags && !(flags & IS_NUMBER_NOT_INT) );
486 return check_is_scalar_ref(sv);
492 return check_reftype(type, sv);
496 /* not using sv_isobject to avoid repeated get magic */
499 if ( SvOBJECT(rv) ) {
500 char *name = HvNAME_get(SvSTASH(SvRV(sv)));
502 bool is_regexp = strEQ("Regexp", name);
503 return ( (type == RegexpRef) ^ !is_regexp );
510 if ( SvOK(sv) && !SvROK(sv) ) {
514 return ( gv_stashpvn(pv, len, 0) != NULL );
528 /* invoke a CV on an SV and return SvTRUE of the result */
529 STATIC bool check_sv_cv (pTHX_ SV *cv, SV *sv) {
540 call_sv(cv, G_SCALAR);
544 ret = SvTRUE(ret_sv);
553 /* checks the type constraint for an SV based on the type constraint kind */
554 STATIC bool check_type_constraint(pTHX_ tc_kind kind, TC_CHECK tc_check, SV *type_constraint, SV *sv) {
560 return check_sv_type(tc_check.type, sv);
563 return check_sv_class(aTHX_ (HV *)tc_check.sv, sv);
566 return tc_check.fptr(aTHX_ type_constraint, sv);
569 return check_sv_cv(aTHX_ tc_check.sv, sv);
581 /* end of type constraint checking functions */
591 /* Initialize the ATTR structure using positional arguments from Perl space. */
593 STATIC void init_attr (MI *mi, ATTR *attr, AV *desc) {
595 U32 slot_hash, init_arg_hash;
596 STRLEN slot_len, init_arg_len;
597 char *slot_pv, *init_arg_pv;
598 I32 ix = av_len(desc);
599 SV **params = AvARRAY(desc);
607 croak("wrong number of args (%d != 14)", (int)ix + 1);
609 for ( ; ix >= 0; ix-- ) {
610 if ( !params[ix] || params[ix] == &PL_sv_undef )
616 /* handle attribute slot array */
618 if ( !SvROK(params[1]) || SvTYPE(SvRV(params[1])) != SVt_PVAV )
619 croak("slots is not an array");
621 if ( av_len((AV *)SvRV(params[1])) != 0 )
622 croak("Only unary slots are supported at the moment");
624 /* calculate a hash from the slot */
625 /* FIXME arrays etc should also be supported */
626 slot_sv = *av_fetch((AV *)SvRV(params[1]), 0, 0);
627 slot_pv = SvPV(slot_sv, slot_len);
628 PERL_HASH(slot_hash, slot_pv, slot_len);
631 init_arg_sv = params[13];
632 init_arg_pv = SvPV(init_arg_sv, init_arg_len);
633 PERL_HASH(init_arg_hash, init_arg_pv, init_arg_len);
636 /* FIXME better organize these, positionals suck */
637 if ( SvTRUE(params[2]) )
640 if ( SvTRUE(params[3]) )
641 flags |= ATTR_COERCE;
643 if ( SvTRUE(params[4]) )
648 /* type constraint data */
653 int tc_kind = SvIV(params[6]);
654 SV *data = params[7];
658 attr->tc_check.type = SvIV(data);
661 flags |= ATTR_TCREFCNT;
662 attr->tc_check.sv = (SV *)gv_stashsv(data, 0);
665 flags |= ATTR_TCREFCNT;
666 attr->tc_check.sv = SvRV(data);
667 if ( SvTYPE(attr->tc_check.sv) != SVt_PVCV )
668 croak("compiled type constraint is not a coderef");
679 /* default/builder data */
681 if ( SvTRUE(params[10]) ) { /* has default */
685 attr->def.sv = SvRV(sv);
686 if ( SvTYPE(attr->def.sv) != SVt_PVCV )
687 croak("compiled type constraint is not a coderef");
689 attr->def.sv = newSVsv(sv);
690 sv_2mortal(attr->def.sv); /* in case of error soon, we refcnt inc it later after we're done checking params */
693 flags |= ( ATTR_DEFREFCNT | ( default_normal << ATTR_SHIFT_DEFAULT ) );
694 } else if ( SvOK(params[12]) ) { /* builder */
695 attr->def.sv = newSVsv(params[12]);
696 flags |= ( ATTR_DEFREFCNT | ( default_builder << ATTR_SHIFT_DEFAULT ) );
701 attr->trigger = SvROK(params[8]) ? (CV *)SvRV(params[8]) : NULL;
702 if ( attr->trigger && SvTYPE(attr->trigger) != SVt_PVCV )
703 croak("trigger is not a coderef");
705 attr->initializer = SvROK(params[9]) ? (CV *)SvRV(params[9]) : NULL;
706 if ( attr->initializer && SvTYPE(attr->initializer) != SVt_PVCV )
707 croak("initializer is not a coderef");
709 /* now that we're done preparing/checking args and shit, so we finalize the
710 * attr, increasing refcounts for any referenced data, and creating the CV
715 /* copy the outer ref SV */
716 attr->meta_attr = newSVsv(params[0]);
717 attr->type_constraint = newSVsv(tc);
719 /* increase the refcount for auxillary structures */
720 SvREFCNT_inc_simple_void(attr->trigger);
721 SvREFCNT_inc_simple_void(attr->initializer);
722 if ( flags & ATTR_TCREFCNT ) SvREFCNT_inc_simple_void_NN(attr->tc_check.sv);
723 if ( flags & ATTR_DEFREFCNT ) SvREFCNT_inc_simple_void_NN(attr->def.sv);
725 attr->slot_sv = newSVpvn_share(slot_pv, slot_len, slot_hash);
726 attr->slot_u32 = slot_hash;
728 attr->init_arg_sv = newSVpvn_share(init_arg_pv, init_arg_len, init_arg_hash);
729 attr->init_arg_u32 = init_arg_hash;
731 /* cross refs to CVs which use this struct */
735 STATIC SV *new_mi (pTHX_ HV *stash, AV *attrs) {
736 HV *mi_stash = gv_stashpvs("Moose::XS::Meta::Instance",0);
737 SV *sv_ptr = newSViv(0);
738 SV *obj = sv_2mortal(sv_bless(newRV_noinc(sv_ptr), mi_stash));
740 const I32 num_attrs = av_len(attrs) + 1;
744 /* set the pointer now, if we have any initialization errors it'll get
745 * cleaned up because obj is mortal */
746 sv_setiv(sv_ptr, PTR2IV(mi));
748 Newxz(mi->attrs, num_attrs, ATTR);
750 SvREFCNT_inc_simple_void_NN(stash);
753 mi->type = 0; /* nothing else implemented yet */
755 /* initialize attributes */
756 for ( mi->num_attrs = 0; mi->num_attrs < num_attrs; mi->num_attrs++ ) {
757 SV **desc = av_fetch(attrs, mi->num_attrs, 0);
759 if ( !desc || !*desc || !SvROK(*desc) || !(SvTYPE(SvRV(*desc)) == SVt_PVAV) ) {
760 croak("Attribute descriptor has to be a hash reference");
763 init_attr(mi, &mi->attrs[mi->num_attrs], (AV *)SvRV(*desc));
769 STATIC void delete_attr (pTHX_ ATTR *attr) {
771 SV **cvs = AvARRAY(attr->cvs);
773 /* remove the pointers to this ATTR struct from all the the dependent CVs */
774 for ( i = av_len(attr->cvs); i >= 0; i-- ) {
775 CV *cv = (CV *)cvs[i];
779 SvREFCNT_dec(attr->cvs);
780 SvREFCNT_dec(attr->slot_sv);
781 SvREFCNT_dec(attr->type_constraint);
782 if ( attr->flags & ATTR_TCREFCNT ) SvREFCNT_dec(attr->tc_check.sv);
783 if ( attr->flags & ATTR_DEFREFCNT ) SvREFCNT_dec(attr->def.sv);
784 SvREFCNT_dec(attr->trigger);
785 SvREFCNT_dec(attr->initializer);
786 SvREFCNT_dec(attr->writer);
787 SvREFCNT_dec(attr->meta_attr);
790 STATIC void delete_mi (pTHX_ MI *mi) {
791 SvREFCNT_dec(mi->stash);
793 while ( mi->num_attrs--) {
794 ATTR *attr = &mi->attrs[mi->num_attrs];
795 delete_attr(aTHX_ attr);
798 if ( mi->attrs ) Safefree(mi->attrs);
805 /* these functions call Perl-space for MOP methods, helpers etc */
808 /* wow, so much code for the equivalent of
809 * $attr->associated_class->get_meta_instance */
810 STATIC SV *attr_to_meta_instance(pTHX_ SV *meta_attr) {
815 croak("No attr found in magic!");
824 call_pv("Moose::XS::attr_to_meta_instance", G_SCALAR);
829 SvREFCNT_inc_simple_void(mi);
835 return sv_2mortal(mi);
838 /* gets a class and an array of attr parameters */
839 STATIC SV *perl_mi_to_c_mi(pTHX_ SV *perl_mi) {
854 count = call_pv("Moose::XS::meta_instance_to_attr_descs", G_ARRAY);
857 croak("meta_instance_to_attr_descs borked (%d args returned, expecting 2)", (int)count);
865 stash = gv_stashsv(class, 0);
867 mi = new_mi(aTHX_ stash, (AV *)SvRV(attrs));
868 SvREFCNT_inc_simple_void_NN(mi);
873 return sv_2mortal(mi);
878 /* locate an ATTR for a MOP level attribute inside an MI */
879 STATIC ATTR *mi_find_attr(SV *mi_obj, SV *meta_attr) {
881 MI *mi = INT2PTR(MI *, SvIV(SvRV(mi_obj)));
883 for ( ix = 0; ix < mi->num_attrs; ix++ ) {
884 if ( SvRV(mi->attrs[ix].meta_attr) == SvRV(meta_attr) ) {
885 return &mi->attrs[ix];
889 croak("Attr %x not found in meta instance of %s", (unsigned int)PTR2UV(SvRV(meta_attr)) /* SvPV_force_nomg(sv_2mortal(newSVsv(meta_attr))) */, HvNAME_get(mi->stash) );
893 /* returns the ATTR for a CV:
895 * 1. get the Moose::Meta::Attribute using get_stashed_in_mg from the CV itself
896 * 2. get the meta instance by calling $attr->associated_class->get_meta_instance
897 * 3. get the MI by using get_stashed_in_mg from the meta instance, creating it if necessary
898 * 4. search for the appropriate ATTR in the MI using mi_find_attr
900 STATIC ATTR *get_attr(pTHX_ CV *cv) {
901 SV *meta_attr = get_stashed_in_mg(aTHX_ (SV *)cv);
902 SV *perl_mi = attr_to_meta_instance(aTHX_ meta_attr);
903 SV *mi_obj = get_stashed_in_mg(aTHX_ SvRV(perl_mi));
906 mi_obj = perl_mi_to_c_mi(aTHX_ perl_mi);
907 stash_in_mg(aTHX_ SvRV(perl_mi), mi_obj);
910 return mi_find_attr(mi_obj, meta_attr);
913 /* Cache a pointer to the appropriate ATTR in the XSANY of the CV, using
915 STATIC ATTR *define_attr (pTHX_ CV *cv) {
916 ATTR *attr = get_attr(aTHX_ cv);
919 XSANY.any_i32 = PTR2IV(attr);
921 SvREFCNT_inc_simple_void(cv);
922 av_push( attr->cvs, (SV *)cv );
933 STATIC void weaken(pTHX_ SV *sv) {
935 sv_rvweaken(sv); /* FIXME i think this might warn when weakening an already weak ref */
937 croak("weak references are not implemented in this release of perl");
946 /* meta instance protocol
948 * The slot functions don't change the refcount or copy (aliasing semantics)
950 * create_instance returns a new mortal */
952 STATIC SV *get_slot_lvalue(pTHX_ SV *self, ATTR *attr) {
957 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
959 assert( ATTR_DUMB_INSTANCE(attr) );
961 if ((he = hv_fetch_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32)))
967 STATIC bool set_slot_value(pTHX_ SV *self, ATTR *attr, SV *value) {
972 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
974 assert( ATTR_DUMB_INSTANCE(attr) );
976 he = hv_store_ent((HV*)SvRV(self), attr->slot_sv, value, attr->slot_u32);
981 STATIC bool has_slot_value(pTHX_ SV *self, ATTR *attr) {
984 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
986 assert( ATTR_DUMB_INSTANCE(attr) );
988 return hv_exists_ent((HV *)SvRV(self), attr->slot_sv, attr->slot_u32);
991 STATIC SV *deinitialize_slot(pTHX_ SV *self, ATTR *attr) {
994 assert(SvTYPE(SvRV(self)) == SVt_PVHV);
996 assert( ATTR_DUMB_INSTANCE(attr) );
998 return hv_delete_ent((HV *)SvRV(self), attr->slot_sv, 0, attr->slot_u32);
1001 STATIC SV *create_instance(pTHX_ MI *mi) {
1002 return sv_bless(sv_2mortal(newRV_noinc((SV *)newHV())), mi->stash);
1008 /* Shared functionality for readers/writers/accessors, this roughly corresponds
1009 * to the methods of Moose::Meta::Attribute on the instance
1010 * (get_value/set_value, default value handling, etc)
1012 * These functions return mortal copiess and save copies (handling refcounting). */
1014 STATIC void attr_set_common(pTHX_ SV *self, ATTR *attr, SV *value) {
1018 /* FIXME croak if required ? */
1022 if ( ATTR_TYPE(attr) ) {
1023 if ( !check_type_constraint(aTHX_ ATTR_TYPE(attr), attr->tc_check, attr->type_constraint, value) )
1027 copy = newSVsv(value);
1029 if ( ATTR_ISWEAK(attr) && SvROK(copy) )
1032 if ( !set_slot_value(aTHX_ self, attr, copy) ) {
1034 croak("Hash store failed.");
1039 STATIC XS(initializer)
1048 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
1052 attr_set_common(aTHX_ ST(0), attr, ST(1));
1057 STATIC void attr_set_initial_value(pTHX_ SV *self, ATTR *attr, SV *value) {
1058 if ( attr->initializer ) {
1059 if ( !attr->writer ) {
1060 attr->writer = newRV_inc((SV *)new_attr_method(aTHX_ attr->meta_attr, initializer, NULL ));
1070 XPUSHs(sv_2mortal(newSVsv(value)));
1071 XPUSHs(attr->writer);
1072 XPUSHs(attr->meta_attr);
1075 call_sv((SV *)attr->initializer, G_VOID);
1080 attr_set_common(aTHX_ self, attr, value);
1084 STATIC SV *call_builder (pTHX_ SV *self, ATTR *attr) {
1094 /* we invoke the builder as a stringified method. This will not work for
1095 * $obj->$coderef etc, for that we need to use 'default' */
1097 call_method(SvPV_nolen(attr->def.sv), G_SCALAR);
1099 /* the value is a mortal with a refcount of 1, so we need to keep it around */
1102 SvREFCNT_inc_simple_void(sv);
1108 return sv_2mortal(sv);
1112 STATIC SV *get_default(pTHX_ SV *self, ATTR *attr) {
1113 switch ( ATTR_DEFAULT(attr) ) {
1117 case default_builder:
1118 return call_builder(aTHX_ self, attr);
1120 case default_normal:
1121 if ( SvROK(attr->def.sv) ) {
1122 printf("CV default\n");
1125 printf("simple value\n");
1126 return sv_mortalcopy(attr->def.sv); /* will be copied by set for lazy, and by reader for both cases */
1137 /* $attr->get_value($self), will vivify lazy values if needed
1138 * returns an alias to the sv that is copied in the reader/writer/accessor code
1140 STATIC SV *attr_get_value(pTHX_ SV *self, ATTR *attr) {
1141 SV *value = get_slot_lvalue(aTHX_ self, attr);
1144 return sv_mortalcopy(value);
1145 } else if ( ATTR_ISLAZY(attr) ) {
1146 value = get_default(aTHX_ self, attr);
1147 attr_set_initial_value(aTHX_ self, attr, value);
1154 /* $attr->set_value($self) */
1155 STATIC void attr_set_value(pTHX_ SV *self, ATTR *attr, SV *value) {
1156 attr_set_common(aTHX_ self, attr, value);
1158 if ( attr->trigger ) {
1165 /* FIXME copy self & meta attr? */
1167 XPUSHs(sv_2mortal(newSVsv(value)));
1168 XPUSHs(attr->meta_attr);
1170 /* we invoke the builder as a stringified method. This will not work for
1171 * $obj->$coderef etc, for that we need to use 'default' */
1173 call_sv((SV *)attr->trigger, G_VOID);
1180 STATIC bool attr_has_value(pTHX_ SV *self, ATTR *attr) {
1181 return has_slot_value(aTHX_ self, attr);
1184 STATIC SV *attr_clear_value(pTHX_ SV *self, ATTR *attr) {
1185 return deinitialize_slot(aTHX_ self, attr);
1192 /* Perl-space level functionality
1194 * These subs are installed by new_sub's various aliases as the bodies of the
1200 /* generate a new attribute method */
1201 STATIC CV *new_attr_method (pTHX_ SV *attr, XSPROTO(body), char *name) {
1202 CV *cv = newXS(name, body, __FILE__);
1207 /* associate CV with meta attr */
1208 stash_in_mg(aTHX_ (SV *)cv, attr);
1210 /* this will be set on first call */
1229 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
1233 value = attr_get_value(aTHX_ ST(0), attr);
1252 Perl_croak(aTHX_ "Usage: %s(%s, %s)", GvNAME(CvGV(cv)), "self", "value");
1256 attr_set_value(aTHX_ ST(0), attr, ST(1));
1258 ST(0) = ST(1); /* return value */
1271 Perl_croak(aTHX_ "Usage: %s(%s, [ %s ])", GvNAME(CvGV(cv)), "self", "value");
1276 attr_set_value(aTHX_ ST(0), attr, ST(1));
1277 ST(0) = ST(1); /* return value */
1279 SV *value = attr_get_value(aTHX_ ST(0), attr);
1290 STATIC XS(predicate)
1299 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
1303 if ( attr_has_value(aTHX_ ST(0), attr) )
1318 Perl_croak(aTHX_ "Usage: %s(%s)", GvNAME(CvGV(cv)), "self");
1322 attr_clear_value(aTHX_ ST(0), attr);
1336 xs_body_initializer,
1341 STATIC XSPROTO ((*xs_bodies[])) = {
1350 MODULE = Moose PACKAGE = Moose::XS
1354 new_attr_method(attr, name)
1360 char *pv = SvOK(name) ? SvPV_nolen(name) : NULL;
1362 new_reader = xs_body_reader
1363 new_writer = xs_body_writer
1364 new_accessor = xs_body_accessor
1365 new_predicate = xs_body_predicate
1366 new_initializer = xs_body_initializer
1367 new_clearer = xs_body_clearer
1369 if ( ix >= max_xs_body )
1370 croak("Unknown Moose::XS body type");
1372 if ( !sv_isobject(attr) )
1373 croak("'attr' must be a Moose::Meta::Attribute");
1375 RETVAL = new_attr_method(aTHX_ attr, xs_bodies[ix], pv);
1380 MODULE = Moose PACKAGE = Moose::XS::Meta::Instance
1388 MI *mi = INT2PTR(MI *, SvIV(SvRV(self)));
1391 delete_mi(aTHX_ mi);
1394 MODULE = Moose PACKAGE = Moose::XS::TypeConstraints
1416 ScalarRef = ScalarRef
1417 FileHandle = FileHandle
1418 RegexpRef = RegexpRef
1421 ClassName = ClassName
1423 RETVAL = check_sv_type(ix, sv);
1428 ObjectOfType(sv, class)
1433 HV *stash = gv_stashsv(class, 0);
1435 RETVAL = check_sv_class(aTHX_ stash, sv);