//===--- USRFindingAction.h - Clang refactoring library -------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Provides an action to find all relevant USRs at a point.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLING_REFACTOR_RENAME_USR_FINDING_ACTION_H
#define LLVM_CLANG_TOOLING_REFACTOR_RENAME_USR_FINDING_ACTION_H

#include "clang/Basic/LLVM.h"
#include "llvm/ADT/ArrayRef.h"

#include <string>
#include <vector>

namespace clang {
class ASTConsumer;
class ASTContext;
class CompilerInstance;
class NamedDecl;

namespace tooling {

/// Returns the canonical declaration that best represents a symbol that can be
/// renamed.
///
/// The following canonicalization rules are currently used:
///
/// - A constructor is canonicalized to its class.
/// - A destructor is canonicalized to its class.
const NamedDecl *getCanonicalSymbolDeclaration(const NamedDecl *FoundDecl);

/// Returns the set of USRs that correspond to the given declaration.
std::vector<std::string> getUSRsForDeclaration(const NamedDecl *ND,
                                               ASTContext &Context);

struct USRFindingAction {
  USRFindingAction(ArrayRef<unsigned> SymbolOffsets,
                   ArrayRef<std::string> QualifiedNames, bool Force)
      : SymbolOffsets(SymbolOffsets), QualifiedNames(QualifiedNames),
        ErrorOccurred(false), Force(Force) {}
  std::unique_ptr<ASTConsumer> newASTConsumer();

  ArrayRef<std::string> getUSRSpellings() { return SpellingNames; }
  ArrayRef<std::vector<std::string>> getUSRList() { return USRList; }
  bool errorOccurred() { return ErrorOccurred; }

private:
  std::vector<unsigned> SymbolOffsets;
  std::vector<std::string> QualifiedNames;
  std::vector<std::string> SpellingNames;
  std::vector<std::vector<std::string>> USRList;
  bool ErrorOccurred;
  bool Force;
};

} // end namespace tooling
} // end namespace clang

#endif // LLVM_CLANG_TOOLING_REFACTOR_RENAME_USR_FINDING_ACTION_H