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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_NAMESPACEALIASER_H10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_NAMESPACEALIASER_H11 12#include "clang/AST/ASTContext.h"13#include "clang/AST/Stmt.h"14#include "clang/Basic/Diagnostic.h"15#include "clang/Basic/SourceManager.h"16#include "llvm/ADT/DenseMap.h"17#include "llvm/ADT/StringMap.h"18#include <map>19#include <optional>20 21namespace clang::tidy::utils {22 23// This class creates function-level namespace aliases.24class NamespaceAliaser {25public:26 explicit NamespaceAliaser(const SourceManager &SourceMgr);27 // Adds a namespace alias for \p Namespace valid near \p28 // Statement. Picks the first available name from \p Abbreviations.29 // Returns ``std::nullopt`` if an alias already exists or there is an error.30 std::optional<FixItHint>31 createAlias(ASTContext &Context, const Stmt &Statement,32 llvm::StringRef Namespace,33 const std::vector<std::string> &Abbreviations);34 35 // Get an alias name for \p Namespace valid at \p Statement. Returns \p36 // Namespace if there is no alias.37 std::string getNamespaceName(ASTContext &Context, const Stmt &Statement,38 llvm::StringRef Namespace) const;39 40private:41 const SourceManager &SourceMgr;42 llvm::DenseMap<const FunctionDecl *, llvm::StringMap<std::string>>43 AddedAliases;44};45 46} // namespace clang::tidy::utils47 48#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_NAMESPACEALIASER_H49