| 1 | //===--- ConfusableIdentifierCheck.h - clang-tidy |
|---|---|
| 2 | //-------------------------------*- C++ -*-===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_CONFUSABLE_IDENTIFIER_CHECK_H |
| 11 | #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_CONFUSABLE_IDENTIFIER_CHECK_H |
| 12 | |
| 13 | #include "../ClangTidyCheck.h" |
| 14 | #include <unordered_map> |
| 15 | |
| 16 | namespace clang::tidy::misc { |
| 17 | |
| 18 | /// Finds symbol which have confusable identifiers, i.e. identifiers that look |
| 19 | /// the same visually but have a different Unicode representation. |
| 20 | /// If symbols are confusable but don't live in conflicting namespaces, they are |
| 21 | /// not reported. |
| 22 | class ConfusableIdentifierCheck : public ClangTidyCheck { |
| 23 | public: |
| 24 | ConfusableIdentifierCheck(StringRef Name, ClangTidyContext *Context); |
| 25 | ~ConfusableIdentifierCheck(); |
| 26 | |
| 27 | void registerMatchers(ast_matchers::MatchFinder *Finder) override; |
| 28 | void check(const ast_matchers::MatchFinder::MatchResult &Result) override; |
| 29 | void onEndOfTranslationUnit() override; |
| 30 | std::optional<TraversalKind> getCheckTraversalKind() const override { |
| 31 | return TK_IgnoreUnlessSpelledInSource; |
| 32 | } |
| 33 | |
| 34 | struct ContextInfo { |
| 35 | const DeclContext *PrimaryContext; |
| 36 | const DeclContext *NonTransparentContext; |
| 37 | llvm::SmallVector<const DeclContext *> PrimaryContexts; |
| 38 | llvm::SmallVector<const CXXRecordDecl *> Bases; |
| 39 | }; |
| 40 | |
| 41 | private: |
| 42 | struct Entry { |
| 43 | const NamedDecl *Declaration; |
| 44 | const ContextInfo *Info; |
| 45 | }; |
| 46 | |
| 47 | const ContextInfo *getContextInfo(const DeclContext *DC); |
| 48 | |
| 49 | llvm::StringMap<llvm::SmallVector<Entry>> Mapper; |
| 50 | std::unordered_map<const DeclContext *, ContextInfo> ContextInfos; |
| 51 | }; |
| 52 | |
| 53 | } // namespace clang::tidy::misc |
| 54 | |
| 55 | #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_CONFUSABLE_IDENTIFIER_CHECK_H |
| 56 |