GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 88.6% 93 / 0 / 105
Functions: 100.0% 4 / 0 / 4
Branches: 57.2% 127 / 0 / 222
src/typechecker/TypeMatcher.cpp
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1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "TypeMatcher.h"
4
5 #include <exception/SemanticError.h>
6 #include <model/GenericType.h>
7 #include <model/Interface.h>
8 #include <model/Struct.h>
9 #include <symboltablebuilder/Scope.h>
10
11 namespace spice::compiler {
12
13 3466 bool TypeMatcher::matchRequestedToCandidateTypes(const QualTypeList &candidateTypes, const QualTypeList &reqTypes,
14 TypeMapping &typeMapping, ResolverFct &resolverFct, bool strictQualifiers) {
15 // Check if the size of template types matches
16
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 3466 if (reqTypes.size() != candidateTypes.size())
17 ✗ return false;
18
19 // Loop through both lists at the same time and match each pair of template types individually
20
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 7710 for (size_t i = 0; i < candidateTypes.size(); i++) {
21 4265 const QualType &reqType = reqTypes.at(i);
22 4265 const QualType &candidateType = candidateTypes.at(i);
23
24 // Match the pair of template types
25
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 4265 if (!matchRequestedToCandidateType(candidateType, reqType, typeMapping, resolverFct, strictQualifiers))
26 21 return false;
27 }
28 3445 return true;
29 }
30
31 88657 bool TypeMatcher::matchRequestedToCandidateType(QualType candidateType, QualType requestedType, TypeMapping &typeMapping,
32 ResolverFct &resolverFct, bool strictQualifierMatching) {
33 // Unwrap as far as possible and remove reference wrappers if possible
34 88657 QualType::unwrapBothWithRefWrappers(candidateType, requestedType);
35
36 // If the candidate does not contain any generic parts, we can simply check for type equality
37
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 88657 if (!candidateType.hasAnyGenericParts()) {
38 // Check if the right one is a struct that implements the interface on the left
39
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 63492 if (candidateType.matchesInterfaceImplementedByStruct(requestedType))
40 3 return true;
41 // Normal equality check
42 63489 return candidateType.matches(requestedType, true, !strictQualifierMatching, true);
43 }
44
45 // Check if the candidate type itself is generic
46
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 25165 if (candidateType.isBase(TY_GENERIC)) { // The candidate type itself is generic
47
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 13962 const QualType candidateBaseType = candidateType.getBase();
48
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 13962 const std::string &genericTypeName = candidateBaseType.getSubType();
49
50 // Check if we know the concrete type for that generic type name already
51
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 13962 const auto it = typeMapping.find(genericTypeName);
52
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 13962 if (it != typeMapping.end()) { // This is a known generic type
53 3443 QualType knownConcreteType = it->second;
54
55 // Merge qualifiers of candidate type and known concrete type together
56
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 3443 const TypeQualifiers mergedQualifiers = knownConcreteType.getQualifiers().merge(candidateType.getQualifiers());
57 3443 knownConcreteType.setQualifiers(mergedQualifiers);
58
59 // Remove reference wrapper of candidate type if required
60
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 3443 if (!requestedType.isRef())
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 3277 knownConcreteType = knownConcreteType.removeReferenceWrapper();
62
63
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 3443 if (requestedType.isRef() && !knownConcreteType.isRef())
64 ✗ requestedType = requestedType.getContained().toNonConst();
65
66 // Check if the known concrete type matches the requested type
67
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 3443 return knownConcreteType.matches(requestedType, true, !strictQualifierMatching, true);
68 } else { // This is an unknown generic type
69 // Retrieve generic candidate type by its name
70
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 10519 const GenericType *genericCandidateBaseType = resolverFct(genericTypeName);
71
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 10519 assert(genericCandidateBaseType != nullptr);
72
73 // Check if the requested type fulfills all conditions of the generic candidate type
74 10519 QualType newBaseType;
75
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 10519 if (!genericCandidateBaseType->checkConditionsOf(requestedType, newBaseType, true, !strictQualifierMatching))
76 3421 return false;
77
78
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 7098 QualType substantiatedCandidateType = candidateType.replaceBaseType(newBaseType);
79
80 // Remove reference wrapper of candidate type if required
81
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 7098 if (!requestedType.isRef())
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 6752 substantiatedCandidateType = substantiatedCandidateType.removeReferenceWrapper();
83
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 7098 if (requestedType.isRef() && !substantiatedCandidateType.isRef())
85
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 9 requestedType = requestedType.getContained().toNonConst();
86
87
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 7098 if (!substantiatedCandidateType.matches(requestedType, true, !strictQualifierMatching, true))
88 1 return false;
89
90 // Zero out all qualifiers in the requested type, that are present in the candidate type
91 // This is to set all qualifiers that are not present in the candidate type to the generic type replacement
92
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 7097 requestedType.getQualifiers().eraseWithMask(substantiatedCandidateType.getQualifiers());
93
94 // Add to type mapping
95
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 7097 const QualType newMappingType = requestedType.hasAnyGenericParts() ? candidateBaseType : newBaseType;
96
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 7097 assert(newMappingType.is(TY_GENERIC) || newMappingType.is(TY_INVALID) ||
97 newMappingType.getQualifiers().isSigned != newMappingType.getQualifiers().isUnsigned);
98
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 7097 typeMapping.emplace(genericTypeName, newMappingType);
99
100 7097 return true; // The type was successfully matched, by enriching the type mapping
101 }
102 } else { // The candidate type itself is non-generic, but one or several template or param types are
103 // Check if supertype and subtype are equal
104
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 11203 if (requestedType.getSuperType() != candidateType.getSuperType())
105 7525 return false;
106
107 // If we have a function/procedure type, check the param and return types. Otherwise, check the template types
108
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 3678 if (candidateType.isOneOf({TY_FUNCTION, TY_PROCEDURE})) {
109 // Check param and return types
110 3 const QualTypeList &candidatePRTypes = candidateType.getFunctionParamAndReturnTypes();
111 3 const QualTypeList &requestedPRTypes = requestedType.getFunctionParamAndReturnTypes();
112
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 3 if (!matchRequestedToCandidateTypes(candidatePRTypes, requestedPRTypes, typeMapping, resolverFct, strictQualifierMatching))
113 ✗ return false;
114 } else {
115
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 3675 if (requestedType.getSubType() != candidateType.getSubType())
116 212 return false;
117
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 3463 if (requestedType.getBodyScope()->parent != candidateType.getBodyScope()->parent)
118 ✗ return false;
119
120 // Check template types
121 3463 const QualTypeList &candidateTTypes = candidateType.getTemplateTypes();
122 3463 const QualTypeList &requestedTTypes = requestedType.getTemplateTypes();
123
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 3463 if (!matchRequestedToCandidateTypes(candidateTTypes, requestedTTypes, typeMapping, resolverFct, strictQualifierMatching))
124 21 return false;
125 }
126
127 3445 return true; // All requested template types match to their respective candidate template type -> successfully matched
128 }
129 }
130
131 1118 void TypeMatcher::substantiateTypesWithTypeMapping(QualTypeList &qualTypes, const TypeMapping &typeMapping, const ASTNode *node) {
132
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 1296 for (QualType &qualType : qualTypes)
133
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 178 if (qualType.hasAnyGenericParts())
134
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 164 substantiateTypeWithTypeMapping(qualType, typeMapping, node);
135 1118 }
136
137 19426 void TypeMatcher::substantiateTypeWithTypeMapping(QualType &type, const TypeMapping &typeMapping, // NOLINT(*-no-recursion)
138 const ASTNode *node) {
139
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 19426 assert(type.hasAnyGenericParts());
140
141 // Check if the type itself is generic
142
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 19426 if (type.isBase(TY_GENERIC)) { // The symbol type itself is generic
143
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 14269 const std::string genericTypeName = type.getBase().getSubType();
144
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 14269 assert(typeMapping.contains(genericTypeName));
145
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 14269 const QualType &replacementType = typeMapping.at(genericTypeName);
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 14269 type = type.replaceBaseType(replacementType);
147
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 19426 } else if (type.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE})) { // The base type is a function or procedure
148 // Substantiate each param or return type
149
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 21 QualTypeList paramAndReturnTypes = type.getFunctionParamAndReturnTypes();
150
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 65 for (QualType &paramOrReturnType : paramAndReturnTypes)
151
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 44 if (paramOrReturnType.hasAnyGenericParts())
152
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 21 substantiateTypeWithTypeMapping(paramOrReturnType, typeMapping, node);
153 // Attach the list of concrete param types to the symbol type
154
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 21 type = type.getWithFunctionParamAndReturnTypes(paramAndReturnTypes);
155 21 } else { // The base type is a struct or interface
156
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 5136 assert(type.getBase().isOneOf({TY_STRUCT, TY_INTERFACE}));
157 // Substantiate each template type
158
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 5136 const QualType baseType = type.getBase();
159
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 5136 QualTypeList templateTypes = baseType.getTemplateTypes();
160
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 11769 for (QualType &templateType : templateTypes)
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 6633 if (templateType.hasAnyGenericParts())
162
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 6323 substantiateTypeWithTypeMapping(templateType, typeMapping, node);
163 // Attach the list of concrete template types to the symbol type
164
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 5136 type = type.getWithBaseTemplateTypes(templateTypes);
165 // Lookup the scope of the concrete struct or interface type
166 // Only do this, if the struct or interface is not self-referencing, because in that case we'd end up in an infinite recursion
167
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 5136 if (!baseType.isSelfReferencingStructType()) {
168
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 4798 if (baseType.is(TY_STRUCT)) { // Struct
169
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 4366 const Struct *spiceStruct = baseType.getStruct(node, templateTypes);
170
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 4366 if (!spiceStruct) {
171 ✗ assert(node != nullptr);
172 ✗ const std::string signature = Struct::getSignature(baseType.getSubType(), templateTypes);
173 ✗ throw SemanticError(node, UNKNOWN_DATATYPE, "Could not find struct '" + signature + "'");
174 ✗ }
175
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 4366 type = type.getWithBodyScope(spiceStruct->scope);
176 } else { // Interface
177
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 432 const Interface *spiceInterface = baseType.getInterface(node, templateTypes);
178
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 432 if (!spiceInterface) {
179 ✗ assert(node != nullptr);
180 ✗ const std::string signature = Interface::getSignature(baseType.getSubType(), templateTypes);
181 ✗ throw SemanticError(node, UNKNOWN_DATATYPE, "Could not find interface '" + signature + "'");
182 ✗ }
183
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 432 type = type.getWithBodyScope(spiceInterface->scope);
184 }
185 }
186 5136 }
187 19426 }
188
189 } // namespace spice::compiler
190