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Dir : ~/usr/include/clang/AST/

Edit File: TypeOrdering.h

//===-------------- TypeOrdering.h - Total ordering for types ---*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Allows QualTypes to be sorted and hence used in maps and sets.
///
/// Defines clang::QualTypeOrdering, a total ordering on clang::QualType,
/// and hence enables QualType values to be sorted and to be used in
/// std::maps, std::sets, llvm::DenseMaps, and llvm::DenseSets.
///
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_TYPEORDERING_H
#define LLVM_CLANG_AST_TYPEORDERING_H

#include "clang/AST/CanonicalType.h"
#include "clang/AST/Type.h"
#include <functional>

namespace clang {

/// Function object that provides a total ordering on QualType values.
struct QualTypeOrdering {
  bool operator()(QualType T1, QualType T2) const {
    return std::less<void*>()(T1.getAsOpaquePtr(), T2.getAsOpaquePtr());
  }
};

}

namespace llvm {

template<> struct DenseMapInfo<clang::QualType> {
    static inline clang::QualType getEmptyKey() { return clang::QualType(); }

static inline clang::QualType getTombstoneKey() {
      using clang::QualType;
      return QualType::getFromOpaquePtr(reinterpret_cast<clang::Type *>(-1));
    }

static unsigned getHashValue(clang::QualType Val) {
      return (unsigned)((uintptr_t)Val.getAsOpaquePtr()) ^
            ((unsigned)((uintptr_t)Val.getAsOpaquePtr() >> 9));
    }

static bool isEqual(clang::QualType LHS, clang::QualType RHS) {
      return LHS == RHS;
    }
  };

template<> struct DenseMapInfo<clang::CanQualType> {
    static inline clang::CanQualType getEmptyKey() {
      return clang::CanQualType();
    }

static inline clang::CanQualType getTombstoneKey() {
      using clang::CanQualType;
      return CanQualType::getFromOpaquePtr(reinterpret_cast<clang::Type *>(-1));
    }

static unsigned getHashValue(clang::CanQualType Val) {
      return (unsigned)((uintptr_t)Val.getAsOpaquePtr()) ^
      ((unsigned)((uintptr_t)Val.getAsOpaquePtr() >> 9));
    }

static bool isEqual(clang::CanQualType LHS, clang::CanQualType RHS) {
      return LHS == RHS;
    }
  };
}

#endif