UseTrailingReturnTypeCheck.h
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//===--- UseTrailingReturnTypeCheck.h - clang-tidy---------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USETRAILINGRETURNTYPECHECK_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USETRAILINGRETURNTYPECHECK_H
#include "../ClangTidyCheck.h"
#include "clang/Lex/Token.h"
namespace clang {
namespace tidy {
namespace modernize {
struct ClassifiedToken {
Token T;
bool isQualifier;
bool isSpecifier;
};
/// Rewrites function signatures to use a trailing return type.
///
/// For the user-facing documentation see:
/// http://clang.llvm.org/extra/clang-tidy/checks/modernize-use-trailing-type-return.html
class UseTrailingReturnTypeCheck : public ClangTidyCheck {
public:
UseTrailingReturnTypeCheck(StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context) {}
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
return LangOpts.CPlusPlus11;
}
void registerMatchers(ast_matchers::MatchFinder *Finder) override;
void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
Preprocessor *ModuleExpanderPP) override;
void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
private:
Preprocessor *PP = nullptr;
SourceLocation findTrailingReturnTypeSourceLocation(
const FunctionDecl &F, const FunctionTypeLoc &FTL, const ASTContext &Ctx,
const SourceManager &SM, const LangOptions &LangOpts);
llvm::Optional<SmallVector<ClassifiedToken, 8>>
classifyTokensBeforeFunctionName(const FunctionDecl &F, const ASTContext &Ctx,
const SourceManager &SM,
const LangOptions &LangOpts);
SourceRange findReturnTypeAndCVSourceRange(const FunctionDecl &F,
const TypeLoc &ReturnLoc,
const ASTContext &Ctx,
const SourceManager &SM,
const LangOptions &LangOpts);
void keepSpecifiers(std::string &ReturnType, std::string &Auto,
SourceRange ReturnTypeCVRange, const FunctionDecl &F,
const FriendDecl *Fr, const ASTContext &Ctx,
const SourceManager &SM, const LangOptions &LangOpts);
};
} // namespace modernize
} // namespace tidy
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USETRAILINGRETURNTYPECHECK_H