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1 | #include "mouse.h" |
2 | |
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3 | |
4 | AV* |
5 | mouse_get_xa(pTHX_ SV* const attr) { |
6 | static MGVTBL mouse_xa_vtbl; /* identity */ |
7 | |
8 | AV* xa; |
9 | MAGIC* mg; |
10 | |
11 | if(!IsObject(attr)){ |
12 | croak("Not a Mouse meta attribute"); |
13 | } |
14 | |
15 | mg = mouse_mg_find(aTHX_ SvRV(attr), &mouse_xa_vtbl, 0x00); |
16 | if(!mg){ |
17 | SV* slot; |
18 | STRLEN len; |
19 | const char* pv; |
20 | U16 flags = 0x00; |
21 | |
22 | ENTER; |
23 | SAVETMPS; |
24 | |
25 | xa = newAV(); |
26 | |
27 | mg = sv_magicext(SvRV(attr), (SV*)xa, PERL_MAGIC_ext, &mouse_xa_vtbl,NULL, 0); |
28 | SvREFCNT_dec(xa); /* refcnt++ in sv_magicext */ |
29 | |
30 | av_extend(xa, MOUSE_XA_last - 1); |
31 | |
32 | slot = mcall0(attr, mouse_name); |
33 | pv = SvPV_const(slot, len); |
34 | av_store(xa, MOUSE_XA_SLOT, newSVpvn_share(pv, len, 0U)); |
35 | |
36 | av_store(xa, MOUSE_XA_ATTRIBUTE, newSVsv(attr)); |
37 | |
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38 | av_store(xa, MOUSE_XA_INIT_ARG, newSVsv(mcall0s(attr, "init_arg"))); |
39 | |
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40 | if(predicate_calls(attr, "has_type_constraint")){ |
41 | SV* tc; |
42 | flags |= MOUSEf_ATTR_HAS_TC; |
43 | |
44 | tc = mcall0s(attr, "type_constraint"); |
45 | av_store(xa, MOUSE_XA_TC, newSVsv(tc)); |
46 | |
47 | if(predicate_calls(attr, "should_auto_deref")){ |
48 | SV* const is_a_type_of = sv_2mortal(newSVpvs_share("is_a_type_of")); |
49 | |
50 | flags |= MOUSEf_ATTR_SHOULD_AUTO_DEREF; |
51 | if( SvTRUEx(mcall1(tc, is_a_type_of, newSVpvs_flags("ArrayRef", SVs_TEMP))) ){ |
52 | flags |= MOUSEf_TC_IS_ARRAYREF; |
53 | } |
54 | else if( SvTRUEx(mcall1(tc, is_a_type_of, newSVpvs_flags("HashRef", SVs_TEMP))) ){ |
55 | flags |= MOUSEf_TC_IS_HASHREF; |
56 | } |
57 | else{ |
58 | mouse_throw_error(attr, tc, |
59 | "Can not auto de-reference the type constraint '%"SVf"'", |
60 | mcall0(tc, mouse_name)); |
61 | } |
62 | } |
63 | |
64 | if(predicate_calls(attr, "should_coerce")){ |
65 | flags |= MOUSEf_ATTR_SHOULD_COERCE; |
66 | } |
67 | |
68 | } |
69 | |
70 | if(predicate_calls(attr, "has_trigger")){ |
71 | flags |= MOUSEf_ATTR_HAS_TRIGGER; |
72 | } |
73 | |
74 | if(predicate_calls(attr, "is_lazy")){ |
75 | flags |= MOUSEf_ATTR_IS_LAZY; |
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76 | } |
77 | if(predicate_calls(attr, "has_builder")){ |
78 | flags |= MOUSEf_ATTR_HAS_BUILDER; |
79 | } |
80 | else if(predicate_calls(attr, "has_default")){ |
81 | flags |= MOUSEf_ATTR_HAS_DEFAULT; |
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82 | } |
83 | |
84 | if(predicate_calls(attr, "is_weak_ref")){ |
85 | flags |= MOUSEf_ATTR_IS_WEAK_REF; |
86 | } |
87 | |
88 | if(predicate_calls(attr, "is_required")){ |
89 | flags |= MOUSEf_ATTR_IS_REQUIRED; |
90 | } |
91 | |
92 | av_store(xa, MOUSE_XA_FLAGS, newSVuv(flags)); |
93 | MOUSE_mg_flags(mg) = flags; |
94 | |
95 | FREETMPS; |
96 | LEAVE; |
97 | } |
98 | else{ |
99 | xa = (AV*)MOUSE_mg_obj(mg); |
100 | |
101 | assert(xa); |
102 | assert(SvTYPE(xa) == SVt_PVAV); |
103 | } |
104 | |
105 | return xa; |
106 | } |
107 | |
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108 | SV* |
109 | mouse_xa_apply_type_constraint(pTHX_ AV* const xa, SV* value, U16 const flags){ |
110 | SV* const tc = MOUSE_xa_tc(xa); |
111 | SV* tc_code; |
112 | |
113 | if(flags & MOUSEf_ATTR_SHOULD_COERCE){ |
114 | value = mcall1s(tc, "coerce", value); |
115 | } |
116 | |
117 | if(!SvOK(MOUSE_xa_tc_code(xa))){ |
118 | tc_code = mcall0s(tc, "_compiled_type_constraint"); |
119 | av_store(xa, MOUSE_XA_TC_CODE, newSVsv(tc_code)); |
120 | |
121 | if(!IsCodeRef(tc_code)){ |
122 | mouse_throw_error(MOUSE_xa_attribute(xa), tc, "Not a CODE reference"); |
123 | } |
124 | } |
125 | else{ |
126 | tc_code = MOUSE_xa_tc_code(xa); |
127 | } |
128 | |
129 | if(!mouse_tc_check(aTHX_ tc_code, value)){ |
130 | mouse_throw_error(MOUSE_xa_attribute(xa), value, |
131 | "Attribute (%"SVf") does not pass the type constraint because: %"SVf, |
132 | mcall0(MOUSE_xa_attribute(xa), mouse_name), |
133 | mcall1s(tc, "get_message", value)); |
134 | } |
135 | |
136 | return value; |
137 | } |
138 | |
139 | |
140 | SV* |
141 | mouse_xa_set_default(pTHX_ AV* const xa, SV* const object) { |
142 | U16 const flags = (U16)MOUSE_xa_flags(xa); |
143 | SV* value; |
144 | |
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145 | ENTER; |
146 | SAVETMPS; |
147 | |
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148 | /* get default value by $attr->builder or $attr->default */ |
149 | if(flags & MOUSEf_ATTR_HAS_BUILDER){ |
150 | SV* const builder = mcall0s(MOUSE_xa_attribute(xa), "builder"); |
151 | value = mcall0(object, builder); /* $object->$builder() */ |
152 | } |
153 | else { |
154 | value = mcall0s(MOUSE_xa_attribute(xa), "default"); |
155 | |
156 | if(IsCodeRef(value)){ |
157 | value = mcall0(object, value); |
158 | } |
159 | } |
160 | |
161 | /* apply coerce and type constraint */ |
162 | if(flags & MOUSEf_ATTR_HAS_TC){ |
163 | value = mouse_xa_apply_type_constraint(aTHX_ xa, value, flags); |
164 | } |
165 | |
166 | /* store value to slot */ |
167 | value = set_slot(object, MOUSE_xa_slot(xa), value); |
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168 | if(flags & MOUSEf_ATTR_IS_WEAK_REF && SvROK(value)){ |
169 | weaken_slot(object, MOUSE_xa_slot(xa)); |
170 | } |
171 | |
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172 | FREETMPS; |
173 | LEAVE; |
174 | |
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175 | return value; |
176 | } |
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177 | |
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178 | MODULE = Mouse::Meta::Attribute PACKAGE = Mouse::Meta::Attribute |
179 | |
180 | PROTOTYPES: DISABLE |
181 | |
182 | BOOT: |
183 | /* readers */ |
184 | INSTALL_SIMPLE_READER(Attribute, name); |
185 | INSTALL_SIMPLE_READER(Attribute, associated_class); |
186 | INSTALL_SIMPLE_READER(Attribute, accessor); |
187 | INSTALL_SIMPLE_READER(Attribute, reader); |
188 | INSTALL_SIMPLE_READER(Attribute, writer); |
189 | INSTALL_SIMPLE_READER(Attribute, predicate); |
190 | INSTALL_SIMPLE_READER(Attribute, clearer); |
191 | INSTALL_SIMPLE_READER(Attribute, handles); |
192 | |
193 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, _is_metadata, is); |
194 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, is_required, required); |
195 | INSTALL_SIMPLE_READER(Attribute, default); |
196 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, is_lazy, lazy); |
197 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, is_lazy_build, lazy_build); |
198 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, is_weak_ref, weak_ref); |
199 | INSTALL_SIMPLE_READER(Attribute, init_arg); |
200 | INSTALL_SIMPLE_READER(Attribute, type_constraint); |
201 | INSTALL_SIMPLE_READER(Attribute, trigger); |
202 | INSTALL_SIMPLE_READER(Attribute, builder); |
203 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, should_auto_deref, auto_deref); |
204 | INSTALL_SIMPLE_READER_WITH_KEY(Attribute, should_coerce, coerce); |
205 | INSTALL_SIMPLE_READER(Attribute, documentation); |
206 | |
207 | /* predicates */ |
208 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_accessor, accessor); |
209 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_reader, reader); |
210 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_writer, writer); |
211 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_predicate, predicate); |
212 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_clearer, clearer); |
213 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_handles, handles); |
214 | |
215 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_default, default); |
216 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_type_constraint, type_constraint); |
217 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_trigger, trigger); |
218 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_builder, builder); |
219 | INSTALL_SIMPLE_PREDICATE_WITH_KEY(Attribute, has_documentation, documentation); |
220 | |
221 | newCONSTSUB(gv_stashpvs("Mouse::Meta::Attribute", TRUE), "accessor_metaclass", |
222 | newSVpvs("Mouse::Meta::Method::Accessor::XS")); |
223 | |