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//===---------- NamespaceAliaser.h - clang-tidy ---------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_NAMESPACEALIASER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_NAMESPACEALIASER_H
#include "clang/AST/ASTContext.h"
#include "clang/AST/Stmt.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include <map>
#include <optional>
namespace clang::tidy::utils {
// This class creates function-level namespace aliases.
class NamespaceAliaser {
public:
explicit NamespaceAliaser(const SourceManager &SourceMgr);
// Adds a namespace alias for \p Namespace valid near \p
// Statement. Picks the first available name from \p Abbreviations.
// Returns ``std::nullopt`` if an alias already exists or there is an error.
std::optional<FixItHint>
createAlias(ASTContext &Context, const Stmt &Statement,
llvm::StringRef Namespace,
const std::vector<std::string> &Abbreviations);
// Get an alias name for \p Namespace valid at \p Statement. Returns \p
// Namespace if there is no alias.
std::string getNamespaceName(ASTContext &Context, const Stmt &Statement,
llvm::StringRef Namespace) const;
private:
const SourceManager &SourceMgr;
llvm::DenseMap<const FunctionDecl *, llvm::StringMap<std::string>>
AddedAliases;
};
} // namespace clang::tidy::utils
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_NAMESPACEALIASER_H
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