GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 88.8% 95 / 0 / 107
Functions: 100.0% 4 / 0 / 4
Branches: 57.6% 129 / 0 / 224
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 11081 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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 11081 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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 24475 for (size_t i = 0; i < candidateTypes.size(); i++) {
21 13431 const QualType &reqType = reqTypes.at(i);
22 13431 const QualType &candidateType = candidateTypes.at(i);
23
24 // Match the pair of template types
25
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 13431 if (!matchRequestedToCandidateType(candidateType, reqType, typeMapping, resolverFct, strictQualifiers))
26 37 return false;
27 }
28 11044 return true;
29 }
30
31 192297 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 192297 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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 192297 if (!candidateType.hasAnyGenericParts()) {
38 // Check if the right one is a struct that implements the interface on the left
39
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 128340 if (candidateType.matchesInterfaceImplementedByStruct(requestedType))
40 11 return true;
41 // Normal equality check
42
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 128329 if (candidateType.matches(requestedType, true, !strictQualifierMatching, true))
43 58407 return true;
44 // As a fallback, check if the right one is a struct that composes the struct on the left as its
45 // first field. This is kept last so the common (non-composing) path does not pay for the lookup.
46 69922 return candidateType.matchesComposedBaseOfStruct(requestedType);
47 }
48
49 // Check if the candidate type itself is generic
50
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 63957 if (candidateType.isBase(TY_GENERIC)) { // The candidate type itself is generic
51
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 30762 const QualType candidateBaseType = candidateType.getBase();
52
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 30762 const std::string &genericTypeName = candidateBaseType.getSubType();
53
54 // Check if we know the concrete type for that generic type name already
55
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 30762 const auto it = typeMapping.find(genericTypeName);
56
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 30762 if (it != typeMapping.end()) { // This is a known generic type
57 7121 QualType knownConcreteType = it->second;
58
59 // Merge qualifiers of candidate type and known concrete type together
60
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 7121 const TypeQualifiers mergedQualifiers = knownConcreteType.getQualifiers().merge(candidateType.getQualifiers());
61 7121 knownConcreteType.setQualifiers(mergedQualifiers);
62
63 // Remove reference wrapper of candidate type if required
64
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 7121 if (!requestedType.isRef())
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 6462 knownConcreteType = knownConcreteType.removeReferenceWrapper();
66
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 7121 if (requestedType.isRef() && !knownConcreteType.isRef())
68 ✗ requestedType = requestedType.getContained().toNonConst();
69
70 // Check if the known concrete type matches the requested type
71
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 7121 return knownConcreteType.matches(requestedType, true, !strictQualifierMatching, true);
72 } else { // This is an unknown generic type
73 // Retrieve generic candidate type by its name
74
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 23641 const GenericType *genericCandidateBaseType = resolverFct(genericTypeName);
75
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 23641 assert(genericCandidateBaseType != nullptr);
76
77 // Check if the requested type fulfills all conditions of the generic candidate type
78 23641 QualType newBaseType;
79
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 23641 if (!genericCandidateBaseType->checkConditionsOf(requestedType, newBaseType, true, !strictQualifierMatching))
80 5792 return false;
81
82
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 17849 QualType substantiatedCandidateType = candidateType.replaceBaseType(newBaseType);
83
84 // Remove reference wrapper of candidate type if required
85
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 17849 if (!requestedType.isRef())
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 17012 substantiatedCandidateType = substantiatedCandidateType.removeReferenceWrapper();
87
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 17849 if (requestedType.isRef() && !substantiatedCandidateType.isRef())
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 14 requestedType = requestedType.getContained().toNonConst();
90
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 17849 if (!substantiatedCandidateType.matches(requestedType, true, !strictQualifierMatching, true))
92 1 return false;
93
94 // Zero out all qualifiers in the requested type, that are present in the candidate type
95 // This is to set all qualifiers that are not present in the candidate type to the generic type replacement
96
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 17848 requestedType.getQualifiers().eraseWithMask(substantiatedCandidateType.getQualifiers());
97
98 // Add to type mapping
99
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 17848 const QualType newMappingType = requestedType.hasAnyGenericParts() ? candidateBaseType : newBaseType;
100
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 17848 assert(newMappingType.is(TY_GENERIC) || newMappingType.is(TY_INVALID) ||
101 newMappingType.getQualifiers().isSigned != newMappingType.getQualifiers().isUnsigned);
102
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 17848 typeMapping.emplace(genericTypeName, newMappingType);
103
104 17848 return true; // The type was successfully matched, by enriching the type mapping
105 }
106 } else { // The candidate type itself is non-generic, but one or several template or param types are
107 // Check if supertype and subtype are equal
108
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 33195 if (requestedType.getSuperType() != candidateType.getSuperType())
109 21350 return false;
110
111 // If we have a function/procedure type, check the param and return types. Otherwise, check the template types
112
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 11845 if (candidateType.isOneOf({TY_FUNCTION, TY_PROCEDURE})) {
113 // Check param and return types
114 5 const QualTypeList &candidatePRTypes = candidateType.getFunctionParamAndReturnTypes();
115 5 const QualTypeList &requestedPRTypes = requestedType.getFunctionParamAndReturnTypes();
116
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 5 if (!matchRequestedToCandidateTypes(candidatePRTypes, requestedPRTypes, typeMapping, resolverFct, strictQualifierMatching))
117 ✗ return false;
118 } else {
119
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 11840 if (requestedType.getSubType() != candidateType.getSubType())
120 764 return false;
121
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 11076 if (requestedType.getBodyScope()->parent != candidateType.getBodyScope()->parent)
122 ✗ return false;
123
124 // Check template types
125 11076 const QualTypeList &candidateTTypes = candidateType.getTemplateTypes();
126 11076 const QualTypeList &requestedTTypes = requestedType.getTemplateTypes();
127
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 11076 if (!matchRequestedToCandidateTypes(candidateTTypes, requestedTTypes, typeMapping, resolverFct, strictQualifierMatching))
128 37 return false;
129 }
130
131 11044 return true; // All requested template types match to their respective candidate template type -> successfully matched
132 }
133 }
134
135 5086 void TypeMatcher::substantiateTypesWithTypeMapping(QualTypeList &qualTypes, const TypeMapping &typeMapping, const ASTNode *node) {
136
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 10998 for (QualType &qualType : qualTypes)
137
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 826 if (qualType.hasAnyGenericParts())
138
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 661 substantiateTypeWithTypeMapping(qualType, typeMapping, node);
139 5086 }
140
141 54129 void TypeMatcher::substantiateTypeWithTypeMapping(QualType &type, const TypeMapping &typeMapping, // NOLINT(*-no-recursion)
142 const ASTNode *node) {
143
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 54129 assert(type.hasAnyGenericParts());
144
145 // Check if the type itself is generic
146
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 54129 if (type.isBase(TY_GENERIC)) { // The symbol type itself is generic
147
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 37460 const std::string genericTypeName = type.getBase().getSubType();
148
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 37460 assert(typeMapping.contains(genericTypeName));
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 37460 const QualType &replacementType = typeMapping.at(genericTypeName);
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 37460 type = type.replaceBaseType(replacementType);
151
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 54129 } else if (type.getBase().isOneOf({TY_FUNCTION, TY_PROCEDURE})) { // The base type is a function or procedure
152 // Substantiate each param or return type
153
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 47 QualTypeList paramAndReturnTypes = type.getFunctionParamAndReturnTypes();
154
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 190 for (QualType &paramOrReturnType : paramAndReturnTypes)
155
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 96 if (paramOrReturnType.hasAnyGenericParts())
156
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 47 substantiateTypeWithTypeMapping(paramOrReturnType, typeMapping, node);
157 // Attach the list of concrete param types to the symbol type
158
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 47 type = type.getWithFunctionParamAndReturnTypes(paramAndReturnTypes);
159 47 } else { // The base type is a struct or interface
160
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 16622 assert(type.getBase().isOneOf({TY_STRUCT, TY_INTERFACE}));
161 // Substantiate each template type
162
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 16622 const QualType baseType = type.getBase();
163
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 16622 QualTypeList templateTypes = baseType.getTemplateTypes();
164
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 54625 for (QualType &templateType : templateTypes)
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 21381 if (templateType.hasAnyGenericParts())
166
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 20137 substantiateTypeWithTypeMapping(templateType, typeMapping, node);
167 // Attach the list of concrete template types to the symbol type
168
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 16622 type = type.getWithBaseTemplateTypes(templateTypes);
169 // Lookup the scope of the concrete struct or interface type
170 // Only do this, if the struct or interface is not self-referencing, because in that case we'd end up in an infinite recursion
171
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 16622 if (!baseType.isSelfReferencingStructType()) {
172
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 15798 if (baseType.is(TY_STRUCT)) { // Struct
173
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 14409 const Struct *spiceStruct = baseType.getStruct(node, templateTypes);
174
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 14409 if (!spiceStruct) {
175 ✗ assert(node != nullptr);
176 ✗ const std::string signature = Struct::getSignature(baseType.getSubType(), templateTypes);
177 ✗ throw SemanticError(node, UNKNOWN_DATATYPE, "Could not find struct '" + signature + "'");
178 ✗ }
179
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 14409 type = type.getWithBodyScope(spiceStruct->scope);
180 } else { // Interface
181
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 1389 const Interface *spiceInterface = baseType.getInterface(node, templateTypes);
182
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 1389 if (!spiceInterface) {
183 ✗ assert(node != nullptr);
184 ✗ const std::string signature = Interface::getSignature(baseType.getSubType(), templateTypes);
185 ✗ throw SemanticError(node, UNKNOWN_DATATYPE, "Could not find interface '" + signature + "'");
186 ✗ }
187
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 1389 type = type.getWithBodyScope(spiceInterface->scope);
188 }
189 }
190 16622 }
191 54129 }
192
193 } // namespace spice::compiler
194