INSTALL_CLASS_HOLDER(Attribute, accessor_metaclass, "Mouse::Meta::Method::Accessor::XS");
+void
+_process_options(SV* klass, SV* name, HV* args)
+CODE:
+{
+ SV** svp;
+ SV* tc = NULL;
+
+ /* 'required' requires eigher 'init_arg', 'builder', or 'default' */
+ bool can_be_required = FALSE;
+ bool has_default = FALSE;
+ bool has_builder = FALSE;
+
+ /* taken from Class::MOP::Attribute::new */
+
+ if(!SvOK(name)){
+ mouse_throw_error(klass, NULL,
+ "You must provide a name for the attribute");
+ }
+
+ svp = hv_fetchs(args, "init_arg", FALSE);
+ if(!svp){
+ (void)hv_stores(args, "init_arg", newSVsv(name));
+ can_be_required = TRUE;
+ }
+ else{
+ can_be_required = SvOK(*svp) ? TRUE : FALSE;
+ }
+
+ svp = hv_fetchs(args, "builder", FALSE);
+ if(svp){
+ if(!SvOK(*svp)){
+ mouse_throw_error(klass, NULL,
+ "builder must be a defined scalar value which is a method name");
+ }
+ can_be_required = TRUE;
+ has_builder = TRUE;
+ }
+ else if((svp = hv_fetchs(args, "default", FALSE))){
+ if(SvROK(*svp) && SvTYPE(SvRV(*svp)) != SVt_PVCV) {
+ mouse_throw_error(klass, NULL,
+ "References are not allowed as default values, you must "
+ "wrap the default of '%"SVf"' in a CODE reference "
+ "(ex: sub { [] } and not [])", name);
+ }
+ can_be_required = TRUE;
+ has_default = TRUE;
+ }
+
+ svp = hv_fetchs(args, "required", FALSE);
+ if( (svp && sv_true(*svp)) && !can_be_required){
+ mouse_throw_error(klass, NULL,
+ "You cannot have a required attribute (%"SVf") "
+ "without a default, builder, or an init_arg", name);
+ }
+
+ /* taken from Mouse::Meta::Attribute->new and ->_process_args */
+
+ svp = hv_fetchs(args, "is", FALSE);
+ if(svp){
+ const char* const is = SvOK(*svp) ? SvPV_nolen_const(*svp) : "undef";
+ if(strEQ(is, "ro")){
+ svp = hv_fetchs(args, "reader", TRUE);
+ if(!sv_true(*svp)){
+ sv_setsv(*svp, name);
+ }
+ }
+ else if(strEQ(is, "rw")){
+ if(hv_fetchs(args, "writer", FALSE)){
+ svp = hv_fetchs(args, "reader", TRUE);
+ }
+ else{
+ svp = hv_fetchs(args, "accessor", TRUE);
+ }
+ sv_setsv(*svp, name);
+ }
+ else if(strEQ(is, "bare")){
+ /* do nothing, but don't complain (later) about missing methods */
+ }
+ else{
+ mouse_throw_error(klass, NULL,
+ "I do not understand this option (is => %s) on attribute (%"SVf")",
+ is, name);
+ }
+ }
+
+ svp = hv_fetchs(args, "isa", FALSE);
+ if(svp){
+ SPAGAIN;
+ PUSHMARK(SP);
+ XPUSHs(*svp);
+ PUTBACK;
+
+ call_pv("Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint",
+ G_SCALAR);
+ SPAGAIN;
+ tc = newSVsv(POPs);
+ PUTBACK;
+ }
+ else if((svp = hv_fetchs(args, "does", FALSE))){
+ SPAGAIN;
+ PUSHMARK(SP);
+ XPUSHs(*svp);
+ PUTBACK;
+
+ call_pv("Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint",
+ G_SCALAR);
+ SPAGAIN;
+ tc = newSVsv(POPs);
+ PUTBACK;
+ }
+ if(tc){
+ (void)hv_stores(args, "type_constraint", tc);
+ }
+
+ svp = hv_fetchs(args, "coerce", FALSE);
+ if(svp){
+ if(!tc){
+ mouse_throw_error(klass, NULL,
+ "You cannot have coercion without specifying a type constraint "
+ "on attribute (%"SVf")", name);
+ }
+ svp = hv_fetchs(args, "weak_ref", FALSE);
+ if(svp && sv_true(*svp)){
+ mouse_throw_error(klass, NULL,
+ "You cannot have a weak reference to a coerced value on "
+ "attribute (%"SVf")", name);
+ }
+ }
+
+ svp = hv_fetchs(args, "lazy_build", FALSE);
+ if(svp){
+ SV* clearer;
+ SV* predicate;
+ if(has_default){
+ mouse_throw_error(klass, NULL,
+ "You can not use lazy_build and default for the same "
+ "attribute (%"SVf")", name);
+ }
+
+ svp = hv_fetchs(args, "lazy", TRUE);
+ sv_setiv(*svp, TRUE);
+
+ svp = hv_fetchs(args, "builder", TRUE);
+ if(!sv_true(*svp)){
+ sv_setpvf(*svp, "_build_%"SVf, name);
+ }
+ has_builder = TRUE;
+
+ clearer = *hv_fetchs(args, "clearer", TRUE);
+ predicate = *hv_fetchs(args, "predicate", TRUE);
+
+ if(SvPV_nolen_const(name)[0] == '_'){
+ if(!sv_true(clearer)){
+ sv_setpvf(clearer, "_clear%"SVf, name);
+ }
+ if(!sv_true(predicate)){
+ sv_setpvf(predicate, "_has%"SVf, name);
+ }
+ }
+ else{
+ if(!sv_true(clearer)){
+ sv_setpvf(clearer, "clear_%"SVf, name);
+ }
+ if(!sv_true(predicate)){
+ sv_setpvf(predicate, "has_%"SVf, name);
+ }
+ }
+ }
+
+ svp = hv_fetchs(args, "auto_deref", FALSE);
+ if(svp && sv_true(*svp)){
+ SV* const meth = sv_2mortal(newSVpvs_share("is_a_type_of"));
+ if(!tc){
+ mouse_throw_error(klass, NULL,
+ "You cannot auto-dereference without specifying a type "
+ "constraint on attribute (%"SVf")", name);
+ }
+
+ if(!(sv_true(mcall1(tc, meth, newSVpvs_flags("ArrayRef", SVs_TEMP)))
+ || sv_true(mcall1(tc, meth, newSVpvs_flags("HashRef", SVs_TEMP))) )){
+ mouse_throw_error(klass, NULL,
+ "You cannot auto-dereference anything other than a ArrayRef "
+ "or HashRef on attribute (%"SVf")", name);
+ }
+ }
+
+ svp = hv_fetchs(args, "trigger", FALSE);
+ if(svp){
+ if(!IsCodeRef(*svp)){
+ mouse_throw_error(klass, NULL,
+ "Trigger must be a CODE ref on attribute (%"SVf")",
+ name);
+ }
+ }
+
+
+ svp = hv_fetchs(args, "lazy", FALSE);
+ if(svp && sv_true(*svp)){
+ if(!(has_default || has_builder)){
+ mouse_throw_error(klass, NULL,
+ "You cannot have lazy attribute (%"SVf") without specifying "
+ "a default value for it", name);
+ }
+ }
+}
projects / gitmo/Mouse.git / blobdiff