GCC Code Coverage Report

Directory: ../
File: src/typechecker/StructManager.cpp
Date: 2026-01-03 22:25:30
Coverage Exec Excl Total
Lines: 97.4% 150 0 154
Functions: 100.0% 11 0 11
Branches: 57.5% 165 0 287
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "StructManager.h"
4
5 #include <ast/ASTNodes.h>
6 #include <exception/SemanticError.h>
7 #include <symboltablebuilder/Scope.h>
8 #include <typechecker/TypeMatcher.h>
9 #include <util/CodeLoc.h>
10 #include <util/CustomHashFunctions.h>
11
12 namespace spice::compiler {
13
14 // Static member initialization
15 std::unordered_map<uint64_t, Struct *> StructManager::lookupCache = {};
16 size_t StructManager::lookupCacheHits = 0;
17 size_t StructManager::lookupCacheMisses = 0;
18
19 717 Struct *StructManager::insert(Scope *insertScope, Struct &spiceStruct, std::vector<Struct *> *nodeStructList) {
20 // Open a new manifestation list. Which gets filled by the substantiated manifestations of the struct
21
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 717 const std::string structId = spiceStruct.name + ":" + spiceStruct.declNode->codeLoc.toPrettyLineAndColumn();
22
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 717 insertScope->structs.insert({structId, StructManifestationList()});
23
24 // Save substantiation in declaration node
25
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 717 Struct *substantiation = insertSubstantiation(insertScope, spiceStruct, spiceStruct.declNode);
26
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 717 nodeStructList->push_back(substantiation);
27
28 717 return substantiation;
29 717 }
30
31 1186 Struct *StructManager::insertSubstantiation(Scope *insertScope, Struct &newManifestation, const ASTNode *declNode) {
32
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 1186 const std::string signature = newManifestation.getSignature();
33
34 #ifndef NDEBUG
35 // Make sure that the manifestation does not exist already
36
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 3018 for (const auto &val : insertScope->structs | std::views::values)
37
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 1832 assert(!val.contains(signature));
38 #endif
39
40 // Retrieve the matching manifestation list of the scope
41
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 1186 const std::string structId = newManifestation.name + ":" + declNode->codeLoc.toPrettyLineAndColumn();
42
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 1186 assert(insertScope->structs.contains(structId));
43
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 1186 StructManifestationList &manifestationList = insertScope->structs.at(structId);
44
45 // Add substantiated struct
46 1186 newManifestation.manifestationIndex = manifestationList.size();
47
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 1186 manifestationList.emplace(signature, newManifestation);
48
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 2372 return &manifestationList.at(signature);
49 1186 }
50
51 /**
52 * Check if there is a struct in this scope, fulfilling all given requirements and if found, return it.
53 * If more than one struct matches the requirement, an error gets thrown
54 *
55 * @param matchScope Scope to match against
56 * @param qt Struct name requirement
57 * @param reqTemplateTypes Template types to substantiate generic types
58 * @param node Instantiation AST node for printing error messages
59 * @return Matched struct or nullptr
60 */
61 25720 Struct *StructManager::match(Scope *matchScope, const std::string &qt, const QualTypeList &reqTemplateTypes,
62 const ASTNode *node) {
63 // Do cache lookup
64 25720 const uint64_t cacheKey = getCacheKey(matchScope, qt, reqTemplateTypes);
65
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 25720 if (lookupCache.contains(cacheKey)) {
66 24391 lookupCacheHits++;
67
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 24391 return lookupCache.at(cacheKey);
68 }
69 1329 lookupCacheMisses++;
70
71 // Copy the registry to prevent iterating over items, that are created within the loop
72
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 1329 StructRegistry structRegistry = matchScope->structs;
73 // Loop over struct registry to find structs, that match the requirements of the instantiation
74 1329 std::vector<Struct *> matches;
75
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 3439 for (const auto &[structId, m] : structRegistry) {
76 // Copy the manifestation list to prevent iterating over items, that are created within the loop
77
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 2110 const StructManifestationList manifestations = m;
78
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 3767 for (const auto &[mangledName, presetStruct] : manifestations) {
79 // Skip generic substantiations to prevent double matching of a struct
80
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 2843 if (presetStruct.isGenericSubstantiation())
81 1188 continue;
82
83 // Copy the struct to be able to substantiate types
84
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 2110 Struct candidate = presetStruct;
85
86 // Check name requirement
87
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 2110 if (!matchName(candidate, qt))
88 833 break; // Leave the whole manifestation list, because all manifestations in this list have the same name
89
90 // Prepare mapping table from generic type name to concrete type
91 1277 TypeMapping &typeMapping = candidate.typeMapping;
92 1277 typeMapping.clear();
93
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 1277 typeMapping.reserve(candidate.templateTypes.size());
94
95 // Check template types requirement
96
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 1277 if (!matchTemplateTypes(candidate, reqTemplateTypes, typeMapping, node))
97 1 continue; // Leave this manifestation and continue with the next one
98
99 // Map field types from generic to concrete
100
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 1276 substantiateFieldTypes(candidate, typeMapping, node);
101
102 // We found a match! -> Set the actual candidate and its entry to used
103 1276 candidate.used = true;
104 1276 candidate.entry->used = true;
105
106 // Check if it needs to be substantiated
107
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 1276 if (presetStruct.templateTypes.empty()) {
108
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 454 assert(matchScope->structs.contains(structId) && matchScope->structs.at(structId).contains(mangledName));
109
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 454 matches.push_back(&matchScope->structs.at(structId).at(mangledName));
110 454 matches.back()->used = true;
111 454 continue; // Match was successful -> match the next struct
112 }
113
114 // Check if we already have this manifestation and can simply re-use it
115
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 822 if (manifestations.contains(candidate.getSignature())) {
116
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 353 matches.push_back(&matchScope->structs.at(structId).at(candidate.getSignature()));
117 353 matches.back()->used = true;
118 353 break; // Leave the whole manifestation list to not double-match the manifestation
119 }
120
121 // Insert the substantiated version if required
122
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 469 Struct *substantiatedStruct = insertSubstantiation(matchScope, candidate, presetStruct.declNode);
123
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 469 substantiatedStruct->genericPreset = &matchScope->structs.at(structId).at(mangledName);
124
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 469 substantiatedStruct->declNode->getStructManifestations()->push_back(substantiatedStruct);
125
126 // Copy struct entry
127
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 469 const std::string newSignature = substantiatedStruct->getSignature();
128
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 469 matchScope->lookupStrict(substantiatedStruct->name)->used = true;
129
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 469 substantiatedStruct->entry = matchScope->symbolTable.copySymbol(substantiatedStruct->name, newSignature);
130
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 469 assert(substantiatedStruct->entry != nullptr);
131
132 // Copy struct scope
133
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 469 const std::string &oldScopeName = presetStruct.getScopeName();
134
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 469 const std::string &newScopeName = substantiatedStruct->getScopeName();
135
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 469 substantiatedStruct->scope = matchScope->copyChildScope(oldScopeName, newScopeName);
136
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 469 assert(substantiatedStruct->scope != nullptr);
137 469 substantiatedStruct->scope->isGenericScope = false;
138
139 // Attach the template types to the new struct entry
140
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 469 QualType entryType = substantiatedStruct->entry->getQualType()
141
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 938 .getWithTemplateTypes(substantiatedStruct->getTemplateTypes())
142
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 469 .getWithBodyScope(substantiatedStruct->scope);
143
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 469 substantiatedStruct->entry->updateType(entryType, true);
144
145 // Replace symbol types of field entries with concrete types
146
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 469 assert(substantiatedStruct->scope != nullptr);
147 469 const size_t fieldCount = substantiatedStruct->fieldTypes.size();
148
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 469 const size_t explicitFieldsStartIdx = substantiatedStruct->scope->getFieldCount() - fieldCount;
149
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 1558 for (size_t i = 0; i < fieldCount; i++) {
150 // Replace field type with concrete template type
151
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 1089 SymbolTableEntry *fieldEntry = substantiatedStruct->scope->lookupField(explicitFieldsStartIdx + i);
152
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 1089 assert(fieldEntry != nullptr && fieldEntry->isField());
153
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 1089 QualType &fieldType = substantiatedStruct->fieldTypes.at(i);
154
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 1089 QualType baseType = fieldType.getBase();
155
156 // Set the body scope of fields that are of type <candidate-struct>*
157
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 1089 if (baseType.matches(substantiatedStruct->entry->getQualType(), false, true, true))
158
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 33 fieldType = fieldType.replaceBaseType(baseType.getWithBodyScope(substantiatedStruct->scope));
159
160
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 1089 fieldEntry->updateType(fieldType, /*overwriteExistingType=*/true);
161
162 // Instantiate structs
163
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 1089 if (baseType.is(TY_STRUCT))
164
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 420 (void)baseType.getStruct(node);
165 }
166
167 // Instantiate implemented interfaces if required
168
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 634 for (QualType &interfaceType : substantiatedStruct->interfaceTypes) {
169 // Skip non-generic interfaces
170
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 165 if (!interfaceType.hasAnyGenericParts())
171 ✗ continue;
172
173 // Build template types
174
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 165 QualTypeList templateTypes = interfaceType.getTemplateTypes();
175
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 165 TypeMatcher::substantiateTypesWithTypeMapping(templateTypes, typeMapping, node);
176
177 // Instantiate interface
178
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 165 Interface *spiceInterface = interfaceType.getInterface(node, templateTypes);
179
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 165 assert(spiceInterface != nullptr);
180
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 165 interfaceType = spiceInterface->entry->getQualType();
181 165 }
182
183 // Add to matched structs
184
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 469 matches.push_back(substantiatedStruct);
185
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 2110 }
186 2110 }
187
188 // If no matches were found, return a nullptr
189
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 1329 if (matches.empty())
190 53 return nullptr;
191
192 // Check if more than one struct matches the requirements
193
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 1276 if (matches.size() > 1)
194 ✗ throw SemanticError(node, STRUCT_AMBIGUITY, "Multiple structs match the requested signature");
195
196 // Insert into cache
197
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 1276 lookupCache[cacheKey] = matches.front();
198
199 1276 return matches.front();
200 1329 }
201
202 /**
203 * Checks if the matching candidate fulfills the name requirement
204 *
205 * @param candidate Matching candidate struct
206 * @param reqName Requested struct name
207 * @return Fulfilled or not
208 */
209 2110 bool StructManager::matchName(const Struct &candidate, const std::string &reqName) { return candidate.name == reqName; }
210
211 /**
212 * Checks if the matching candidate fulfills the template types requirement
213 *
214 * @param candidate Matching candidate struct
215 * @param reqTemplateTypes Requested struct template types
216 * @param typeMapping Generic type mapping
217 * @param node Instantiation AST node for printing error messages
218 * @return Fulfilled or not
219 */
220 1277 bool StructManager::matchTemplateTypes(Struct &candidate, const QualTypeList &reqTemplateTypes, TypeMapping &typeMapping,
221 const ASTNode *node) {
222 // Check if the number of types match
223 1277 const size_t typeCount = reqTemplateTypes.size();
224
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 1277 if (typeCount != candidate.templateTypes.size())
225 1 return false;
226
227 // Give the type matcher a way to retrieve instances of GenericType by their name
228 3748 TypeMatcher::ResolverFct genericTypeResolver = [&](const std::string &genericTypeName) {
229 1196 return getGenericTypeOfCandidateByName(candidate, genericTypeName);
230 1276 };
231
232 // Loop over all template types
233
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 2472 for (size_t i = 0; i < typeCount; i++) {
234
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 1196 const QualType &reqType = reqTemplateTypes.at(i);
235
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 1196 QualType &candidateType = candidate.templateTypes.at(i);
236
237 // Check if the requested template type matches the candidate template type. The type mapping may be extended
238
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 1196 if (!TypeMatcher::matchRequestedToCandidateType(candidateType, reqType, typeMapping, genericTypeResolver, false))
239 ✗ return false;
240
241 // Substantiate the candidate param type, based on the type mapping
242
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 1196 if (candidateType.hasAnyGenericParts())
243
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 1196 TypeMatcher::substantiateTypeWithTypeMapping(candidateType, typeMapping, node);
244 }
245
246 1276 return true;
247 1276 }
248
249 /**
250 * Come up with the concrete field types, by applying the type mapping onto the generic field types
251 *
252 * @param candidate Candidate struct
253 * @param typeMapping Generic type mapping
254 * @param node Instantiation AST node for printing error messages
255 */
256 1276 void StructManager::substantiateFieldTypes(Struct &candidate, const TypeMapping &typeMapping, const ASTNode *node) {
257 // Loop over all implicit fields and substantiate the generic ones
258 1276 const size_t fieldCount = candidate.scope->getFieldCount() - candidate.fieldTypes.size();
259
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 1608 for (size_t i = 0; i < fieldCount; i++) {
260
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 332 SymbolTableEntry *fieldEntry = candidate.scope->lookupField(i);
261
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 332 QualType fieldType = fieldEntry->getQualType();
262
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 332 if (fieldType.hasAnyGenericParts()) {
263
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 271 TypeMatcher::substantiateTypeWithTypeMapping(fieldType, typeMapping, node);
264
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 271 fieldEntry->updateType(fieldType, true);
265 }
266 }
267
268 // Loop over all explicit field types and substantiate the generic ones
269
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 4149 for (QualType &fieldType : candidate.fieldTypes)
270
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 2873 if (fieldType.hasAnyGenericParts())
271
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 1320 TypeMatcher::substantiateTypeWithTypeMapping(fieldType, typeMapping, node);
272 1276 }
273
274 /**
275 * Searches the candidate template types for a generic type object with a certain name and return it
276 *
277 * @param candidate Matching candidate struct
278 * @param templateTypeName Template type name
279 * @return Generic type object
280 */
281 1196 const GenericType *StructManager::getGenericTypeOfCandidateByName(const Struct &candidate, const std::string &templateTypeName) {
282
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 1572 for (const GenericType &templateType : candidate.templateTypes) {
283
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 1572 if (!templateType.is(TY_GENERIC))
284 233 continue;
285
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 1339 if (templateType.getSubType() == templateTypeName)
286 1196 return &templateType;
287 }
288 ✗ return nullptr;
289 }
290
291 /**
292 * Calculate the cache key for the struct lookup cache
293 *
294 * @param scope Scope to match against
295 * @param name Struct name requirement
296 * @param templateTypes Template types to substantiate generic types
297 * @return Cache key
298 */
299 25720 uint64_t StructManager::getCacheKey(const Scope *scope, const std::string &name, const QualTypeList &templateTypes) {
300 25720 uint64_t hash = 0;
301 25720 hashCombine64(hash, hashPointer(scope));
302 25720 hashCombine64(hash, std::hash<std::string>{}(name));
303 25720 hashCombine64(hash, hashVector(templateTypes));
304 25720 return hash;
305 }
306
307 /**
308 * Clear the lookup cache
309 */
310 439 void StructManager::cleanup() {
311 439 lookupCache.clear();
312 439 lookupCacheHits = 0;
313 439 lookupCacheMisses = 0;
314 439 }
315
316 /**
317 * Dump usage statistics for the lookup cache
318 */
319 204 std::string StructManager::dumpLookupCacheStatistics() {
320
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 204 std::stringstream stats;
321
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 204 stats << "StructManager lookup cache statistics:" << std::endl;
322
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 204 stats << " lookup cache entries: " << lookupCache.size() << std::endl;
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 204 stats << " lookup cache hits: " << lookupCacheHits << std::endl;
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 204 stats << " lookup cache misses: " << lookupCacheMisses << std::endl;
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 408 return stats.str();
326 204 }
327
328 } // namespace spice::compiler
329