clang-tools 20.0.0git
ConfusableIdentifierCheck.h
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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
16namespace 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.
23public:
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
41private:
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
llvm::SmallString< 256U > Name
FunctionInfo Info
Base class for all clang-tidy checks.
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Finds symbol which have confusable identifiers, i.e.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
std::optional< TraversalKind > getCheckTraversalKind() const override
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.