================
@@ -0,0 +1,488 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "UseConstexprCheck.h"
+#include "../utils/ASTUtils.h"
+#include "../utils/LexerUtils.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/RecursiveASTVisitor.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallPtrSet.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+namespace {
+AST_MATCHER(FunctionDecl, locationPermitsConstexpr) {
+ const bool IsInMainFile =
+ Finder->getASTContext().getSourceManager().isInMainFile(
+ Node.getLocation());
+
+ if (IsInMainFile)
+ return !Node.hasExternalFormalLinkage();
+ return Node.isInlined();
+}
+
+AST_MATCHER(Expr, isCXX11ConstantExpr) {
+ return !Node.isValueDependent() &&
+ Node.isCXX11ConstantExpr(Finder->getASTContext());
+}
+
+AST_MATCHER(DeclaratorDecl, isInMacro) {
+ const SourceRange R =
+ SourceRange(Node.getTypeSpecStartLoc(), Node.getLocation());
+
+ return Node.getLocation().isMacroID() || Node.getEndLoc().isMacroID() ||
+ utils::rangeContainsMacroExpansion(
+ R, &Finder->getASTContext().getSourceManager()) ||
+ utils::rangeIsEntirelyWithinMacroArgument(
+ R, &Finder->getASTContext().getSourceManager());
+}
+
+AST_MATCHER(Decl, hasNoRedecl) {
+ // There is always the actual declaration
+ return !Node.redecls().empty() &&
+ std::next(Node.redecls_begin()) == Node.redecls_end();
+}
+
+AST_MATCHER(Decl, allRedeclsInSameFile) {
+ const SourceManager &SM = Finder->getASTContext().getSourceManager();
+ const SourceLocation L = Node.getLocation();
+ return llvm::all_of(Node.redecls(), [&](const Decl *ReDecl) {
+ return SM.isWrittenInSameFile(L, ReDecl->getLocation());
+ });
+}
+} // namespace
+
+static bool
+satisfiesConstructorPropertiesUntil20(const CXXConstructorDecl *Ctor,
+ ASTContext &Ctx) {
+ const CXXRecordDecl *Rec = Ctor->getParent();
+
+ llvm::SmallPtrSet<const FieldDecl *, 8> UninitializedFields{
+ Rec->field_begin(), Rec->field_end()};
+ llvm::SmallPtrSet<const FieldDecl *, 4> Indirects{};
+
+ for (const CXXCtorInitializer *const Init : Ctor->inits()) {
+ if (const Type *InitType = Init->getBaseClass();
+ InitType && InitType->isRecordType()) {
+ const auto *ConstructingInit =
+ llvm::dyn_cast<CXXConstructExpr>(Init->getInit());
+ if (ConstructingInit &&
+ !ConstructingInit->getConstructor()->isConstexprSpecified())
+ return false;
+ }
+
+ if (Init->isBaseInitializer())
+ continue;
+
+ if (Init->isMemberInitializer()) {
+ const FieldDecl *Field = Init->getMember();
+
+ if (Field->isAnonymousStructOrUnion())
+ Indirects.insert(Field);
+
+ UninitializedFields.erase(Field);
+ }
+ }
+
+ for (const auto &Match :
+ match(cxxRecordDecl(forEach(indirectFieldDecl().bind("indirect"))),
*Rec,
+ Ctx)) {
+ const auto *IField = Match.getNodeAs<IndirectFieldDecl>("indirect");
+
+ size_t NumInitializations = false;
----------------
localspook wrote:
```suggestion
size_t NumInitializations = 0;
```
?
https://github.com/llvm/llvm-project/pull/162741
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