GCC Code Coverage Report

Directory: ../
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 98.4% 184 / 4 / 191
Functions: 100.0% 21 / 0 / 21
Branches: 65.1% 255 / 0 / 392
src/symboltablebuilder/Scope.cpp
Line Branch Exec Source
1 // Copyright (c) 2021-2026 ChilliBits. All rights reserved.
2
3 #include "Scope.h"
4
5 #include <SourceFile.h>
6 #include <ast/ASTNodes.h>
7 #include <exception/SemanticError.h>
8 #include <symboltablebuilder/SymbolTableBuilder.h>
9
10 namespace spice::compiler {
11
12 /**
13 * Create a child scope and return it
14 *
15 * @param scopeName Name of the child scope
16 * @param scopeType Type of the child scope
17 * @param declCodeLoc Code location of the scope
18 * @return Child scope (heap allocated)
19 */
20 25062 Scope *Scope::createChildScope(const std::string &scopeName, ScopeType scopeType, const CodeLoc *declCodeLoc) {
21
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 25062 children.insert({scopeName, std::make_shared<Scope>(this, sourceFile, scopeType, declCodeLoc)});
22 25062 return children.at(scopeName).get();
23 }
24
25 /**
26 * Rename the child scope. This is useful for realizing function overloading by storing a function with not
27 * only its name, but also its signature
28 *
29 * @param oldName Old name of the child table
30 * @param newName New name of the child table
31 */
32 13510 void Scope::renameChildScope(const std::string &oldName, const std::string &newName) {
33
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 13510 assert(children.contains(oldName) && !children.contains(newName));
34
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 13510 auto nodeHandler = children.extract(oldName);
35
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 13510 nodeHandler.key() = newName;
36
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 13510 children.insert(std::move(nodeHandler));
37 13510 }
38
39 /**
40 * Duplicates the child scope by copying it. The duplicated symbols point to the original ones.
41 *
42 * @param oldName Old name of the child block
43 * @param newName New block name
44 */
45 4604 Scope *Scope::copyChildScope(const std::string &oldName, const std::string &newName) {
46
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 4604 assert(children.contains(oldName) && !children.contains(newName));
47 // Create copy
48
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 4604 const std::shared_ptr<Scope> newScope = children.at(oldName)->deepCopyScope();
49 // Save copy under new name
50
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 4604 children.insert({newName, newScope});
51 9208 return newScope.get();
52 4604 }
53
54 /**
55 * Deep copy the current scope and all its children
56 *
57 * @return Deep copy of the current scope
58 */
59 14630 std::shared_ptr<Scope> Scope::deepCopyScope() { // NOLINT(misc-no-recursion)
60 14630 const auto newScope = std::make_shared<Scope>(*this);
61
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 24656 for (const auto &[childName, oldChild] : children) {
62
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 10026 newScope->children[childName] = oldChild->deepCopyScope();
63
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 10026 newScope->children[childName]->parent = newScope.get();
64
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 10026 newScope->children[childName]->symbolTable.scope = newScope->children[childName].get();
65
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 10026 newScope->children[childName]->symbolTable.parent = &newScope->symbolTable;
66 }
67 14630 newScope->symbolTable.scope = newScope.get();
68 14630 return newScope;
69 − } // LCOV_EXCL_LINE - false positive
70
71 /**
72 * Get a child scope of the current scope by its name
73 *
74 * @param scopeName Child scope name
75 * @return Child scope
76 */
77 49884 Scope *Scope::getChildScope(const std::string &scopeName) const {
78
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 49884 if (!children.empty() && children.contains(scopeName))
79 49883 return children.at(scopeName).get();
80 1 return nullptr;
81 }
82
83 /**
84 * Retrieve all variables in the current scope, that have reached the end of their lifetime at the end of this scope
85 *
86 * @return Collection of EOL variables
87 */
88 21780 std::vector<SymbolTableEntry *> Scope::getVarsGoingOutOfScope() { // NOLINT(misc-no-recursion)
89
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 21780 assert(!isRootScope()); // Should not be called in root scope
90 21780 std::vector<SymbolTableEntry *> varsGoingOutOfScope;
91
92 // Collect all variables in this scope
93
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 60672 for (const auto &[name, entry] : symbolTable.symbols) {
94 // Skip 'this' and result variables
95
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 38892 if (name == THIS_VARIABLE_NAME || name == RETURN_VARIABLE_NAME)
96 14716 continue;
97 // Skip parameters (ToDo: Remove when copy constructors work for by-value argument passing)
98
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 24176 if (entry.isParam)
99 15541 continue;
100 // Found variable, that goes out of scope
101
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 8635 varsGoingOutOfScope.push_back(&symbolTable.symbols.at(name));
102 }
103
104 // If this is the scope of a dtor, also return all fields of the struct
105
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 21780 if (isDtorScope) {
106
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 118 assert(!isRootScope() && parent->type == ScopeType::STRUCT);
107 // Get all fields of the struct
108
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 4170 for (const auto &[name, entry] : parent->symbolTable.symbols)
109
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 4052 if (!entry.getQualType().isOneOf({TY_FUNCTION, TY_PROCEDURE}))
110
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 320 varsGoingOutOfScope.push_back(&parent->symbolTable.symbols.at(name));
111 }
112
113 21780 return varsGoingOutOfScope;
114 − } // LCOV_EXCL_LINE - false positive
115
116 /**
117 * Insert a new generic type in this scope
118 *
119 * @param typeName Generic type name
120 * @param genericType Generic type itself
121 */
122 5223 void Scope::insertGenericType(const std::string &typeName, const GenericType &genericType) {
123
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 5223 assert(!genericTypes.contains(typeName));
124
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 5223 genericTypes.insert({typeName, genericType});
125 5223 }
126
127 /**
128 * Search for a generic type by its name in this scope.
129 * If the generic type is not found, a nullptr is returned.
130 *
131 * @param typeName Name of the generic type
132 * @return Generic type
133 */
134 39180 GenericType *Scope::lookupGenericTypeStrict(const std::string &typeName) {
135
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 39180 return genericTypes.contains(typeName) ? &genericTypes.at(typeName) : nullptr;
136 }
137
138 /**
139 * Collect all warnings, produced within this scope
140 *
141 * @param warnings List of warnings
142 * @return Collection of warnings
143 */
144 2277 void Scope::collectWarnings(std::vector<CompilerWarning> &warnings) const { // NOLINT(misc-no-recursion)
145 // Visit own symbols
146
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 9388 for (const SymbolTableEntry &entry : symbolTable.symbols | std::views::values) {
147 // Do not produce a warning if the symbol is used or has a special name
148 7111 const std::string &name = entry.name;
149
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 7111 if (entry.used || name.starts_with(UNUSED_VARIABLE_NAME))
150 6982 continue;
151
152
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 155 const QualType entryType = entry.getQualType();
153
154 // Determine warning type and message by the scope type and the symbol type
155 155 CompilerWarningType warningType = UNUSED_VARIABLE;
156 155 std::string warningMessage;
157
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 155 switch (type) {
158 24 case ScopeType::GLOBAL: {
159 // Skip generic function/procedure/struct/interface entries
160
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 24 if (entryType.isOneOf({TY_FUNCTION, TY_PROCEDURE, TY_STRUCT, TY_INTERFACE}) && !entryType.getTemplateTypes().empty())
161 ✗ continue;
162
163
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 24 if (entryType.is(TY_FUNCTION)) {
164
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 11 const std::vector<Function *> *fctManifestations = entry.declNode->getFctManifestations(name);
165 11 warningType = UNUSED_FUNCTION;
166
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 11 warningMessage = "'" + fctManifestations->front()->getSignature() + "' is unused";
167
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 13 } else if (entryType.is(TY_PROCEDURE)) {
168
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 1 const std::vector<Function *> *fctManifestations = entry.declNode->getFctManifestations(name);
169 1 warningType = UNUSED_PROCEDURE;
170
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 1 warningMessage = "'" + fctManifestations->front()->getSignature() + "' is unused";
171
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 12 } else if (entryType.is(TY_STRUCT)) {
172 1 warningType = UNUSED_STRUCT;
173
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 1 warningMessage = "The struct '" + entry.name + "' is unused";
174
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 11 } else if (entryType.is(TY_INTERFACE)) {
175 1 warningType = UNUSED_INTERFACE;
176
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 1 warningMessage = "The interface '" + entry.name + "' is unused";
177
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 10 } else if (entryType.is(TY_ENUM)) {
178 2 continue; // Do not report unused enums. Only unused enum items are reported
179
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 8 } else if (entryType.is(TY_IMPORT)) {
180 2 warningType = UNUSED_IMPORT;
181
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 2 warningMessage = "The import '" + entry.name + "' is unused";
182
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 6 } else if (entryType.is(TY_ALIAS)) {
183 1 warningType = UNUSED_ALIAS;
184
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 1 warningMessage = "The type alias '" + entry.name + "' is unused";
185 } else {
186 5 warningType = UNUSED_VARIABLE;
187
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 5 warningMessage = "The variable '" + entry.name + "' is unused";
188 }
189
190 22 break;
191 }
192 48 case ScopeType::STRUCT: // fall-through
193 case ScopeType::INTERFACE: {
194
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 48 if (entry.isField()) {
195 5 warningType = UNUSED_FIELD;
196
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 5 warningMessage = "The field '" + entry.name + "' is unused";
197
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 43 } else if (entryType.isOneOf({TY_FUNCTION, TY_PROCEDURE})) {
198 // Skip implicit method entries and generic templates
199
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 43 const std::vector<Function *> *fctManifestations = entry.declNode->getFctManifestations(name);
200
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 43 if (fctManifestations->empty() || fctManifestations->front()->implicitDefault)
201 24 continue;
202
203 19 warningType = UNUSED_METHOD;
204
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 19 warningMessage = "The method '" + fctManifestations->front()->getSignature() + "' is unused";
205 }
206 24 break;
207 }
208 27 case ScopeType::ENUM: {
209 27 warningType = UNUSED_ENUM_ITEM;
210
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 27 warningMessage = "The enum item '" + entry.name + "' is unused";
211 27 break;
212 }
213 56 default: {
214 56 warningType = UNUSED_VARIABLE;
215
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 56 warningMessage = "The variable '" + entry.name + "' is unused";
216 56 break;
217 }
218 }
219
220 // Add warning
221
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 129 warnings.emplace_back(entry.getDeclCodeLoc(), warningType, warningMessage);
222
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 155 }
223
224 // Visit children
225
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 4372 for (const auto &childScope : children | std::views::values)
226
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 2095 if (!childScope->isGenericScope)
227
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 1987 childScope->collectWarnings(warnings);
228 2277 }
229
230 /**
231 * Checks if all variables of this and all child scopes are of an explicit type.
232 * This is executed after type inference to check that all variables could be inferred correctly.
233 */
234 80716 void Scope::ensureSuccessfulTypeInference() const { // NOLINT(misc-no-recursion)
235 // Check symbols in this scope
236
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 262623 for (auto &[name, entry] : symbolTable.symbols)
237
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 181908 if (entry.getQualType().is(TY_DYN))
238
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 1 throw SemanticError(entry.declNode, UNEXPECTED_DYN_TYPE, "For the variable '" + name + "' no type could be inferred");
239
240 // Check child scopes
241
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 159177 for (const auto &scope : children | std::views::values)
242
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 78463 scope->ensureSuccessfulTypeInference();
243 80714 }
244
245 /**
246 * Get the number of fields if this is a struct scope
247 *
248 * @return Number of fields
249 */
250 49680 size_t Scope::getFieldCount() const {
251
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 49680 assert(type == ScopeType::STRUCT);
252 49680 size_t fieldCount = 0;
253
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 963534 for (const auto &symbol : symbolTable.symbols | std::views::values) {
254
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 913854 if (symbol.anonymous)
255 ✗ continue;
256
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 913854 const QualType &symbolType = symbol.getQualType();
257
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 913854 if (symbolType.is(TY_IMPORT))
258 ✗ continue;
259 913854 const ASTNode *declNode = symbol.declNode;
260
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 913854 if (declNode->isFctOrProcDef() || declNode->isStructDef())
261 755479 continue;
262 158375 fieldCount++;
263 }
264 49680 return fieldCount;
265 }
266
267 /**
268 * Get all virtual methods in this scope, sorted by declaration code location
269 *
270 * @return List of virtual method pointers
271 */
272 792 std::vector<Function *> Scope::getVirtualMethods() {
273
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 792 assert(type == ScopeType::STRUCT || type == ScopeType::INTERFACE);
274
275 // Collect all virtual methods
276 792 std::vector<Function *> methods;
277
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 5872 for (auto &[fctId, manifestationList] : functions) {
278
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 5080 assert(!manifestationList.empty());
279
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 12456 for (auto &[mangledName, function] : manifestationList)
280
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 7376 if (function.isVirtualMethod())
281
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 1774 methods.push_back(&functions.at(fctId).at(mangledName));
282 }
283
284 // Sort the list
285
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 5120 std::ranges::sort(methods, [](const Function *a, const Function *b) { return a->getDeclCodeLoc() < b->getDeclCodeLoc(); });
286
287 792 return methods;
288 − } // LCOV_EXCL_LINE - false positive
289
290 /**
291 * Retrieve all struct manifestations in this scope in the order of their declaration
292 *
293 * @return All struct manifestations in declaration order
294 */
295 1185 std::vector<const Struct *> Scope::getAllStructManifestationsInDeclarationOrder() const {
296 // Retrieve all struct manifestations in this scope
297 1185 std::vector<const Struct *> manifestations;
298
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 1185 manifestations.reserve(structs.size()); // Reserve at least the size of individual generic structs
299
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 1912 for (const auto &structManifestations : structs | std::views::values)
300
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 1457 for (const auto &manifestation : structManifestations | std::views::values)
301
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 730 manifestations.push_back(&manifestation);
302
303 // Sort manifestations by declaration code location
304
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 776 auto sortLambda = [](const Struct *lhs, const Struct *rhs) { return lhs->getDeclCodeLoc() < rhs->getDeclCodeLoc(); };
305
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 1185 std::ranges::sort(manifestations, sortLambda);
306 1185 return manifestations;
307 − } // LCOV_EXCL_LINE - false positive
308
309 /**
310 * Get the current number of nested loops
311 *
312 * @return Number of loops
313 */
314 2941 unsigned int Scope::getLoopNestingDepth() const { // NOLINT(misc-no-recursion)
315
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 2941 assert(!isRootScope());
316
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 2941 if (parent->parent == nullptr)
317 541 return 0;
318 2400 unsigned int loopCount = parent->getLoopNestingDepth();
319
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 2400 if (type == ScopeType::WHILE_BODY || type == ScopeType::FOR_BODY || type == ScopeType::FOREACH_BODY)
320 956 loopCount++;
321 2400 return loopCount;
322 }
323
324 /**
325 * Check if this scope is one of the child scopes of a switch statement
326 *
327 * @return Child scope of switch statement or not
328 */
329 7 bool Scope::isInCaseBranch() const { // NOLINT(misc-no-recursion)
330
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 7 assert(!isRootScope());
331
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 7 if (parent->parent == nullptr)
332 2 return false;
333
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 5 if (type == ScopeType::CASE_BODY)
334 4 return true;
335 1 return parent->isInCaseBranch();
336 }
337
338 /**
339 * Check if this scope is within an async scope
340 *
341 * @return Within async scope or not
342 */
343 75 bool Scope::isInAsyncScope() const { // NOLINT(misc-no-recursion)
344
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 75 if (isAsyncScope)
345 8 return true;
346
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 67 return !isRootScope() && parent->isInAsyncScope();
347 }
348
349 /**
350 * Check if unsafe operations are allowed in this scope
351 *
352 * @return Allowed or not
353 */
354 5473 bool Scope::doesAllowUnsafeOperations() const { // NOLINT(misc-no-recursion)
355
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 5473 if (type == ScopeType::UNSAFE_BODY)
356 3433 return true;
357
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 2040 return !isRootScope() && parent->doesAllowUnsafeOperations();
358 }
359
360 /**
361 * Checks if this scope is imported
362 *
363 * @param askingScope Scope, which asks whether the current one is imported from its point of view or not
364 *
365 * @return Imported / not imported
366 */
367 101696 bool Scope::isImportedBy(const Scope *askingScope) const { return askingScope->sourceFile->imports(sourceFile); }
368
369 /**
370 * Get JSON representation of the symbol table
371 *
372 * @return Symbol table as JSON object
373 */
374 80780 nlohmann::json Scope::getSymbolTableJSON() const { // NOLINT(misc-no-recursion)
375
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 80780 nlohmann::json result = symbolTable.toJSON();
376
377 // Collect all children
378 80780 std::vector<nlohmann::json> jsonChildren;
379
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 80780 jsonChildren.reserve(children.size());
380
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 159299 for (const auto &[name, childScope] : children) {
381
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 78519 nlohmann::json c = childScope->getSymbolTableJSON();
382
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 78519 c["name"] = name; // Inject symbol table name into JSON object
383
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 78519 jsonChildren.emplace_back(c);
384 78519 }
385
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 80780 result["children"] = jsonChildren;
386
387 80780 return result;
388 80780 }
389
390 } // namespace spice::compiler
391