| 1 | //===-------------- TypeOrdering.h - Total ordering for types ---*- C++ -*-===// |
|---|---|
| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | /// |
| 9 | /// \file |
| 10 | /// Allows QualTypes to be sorted and hence used in maps and sets. |
| 11 | /// |
| 12 | /// Defines clang::QualTypeOrdering, a total ordering on clang::QualType, |
| 13 | /// and hence enables QualType values to be sorted and to be used in |
| 14 | /// std::maps, std::sets, llvm::DenseMaps, and llvm::DenseSets. |
| 15 | /// |
| 16 | //===----------------------------------------------------------------------===// |
| 17 | |
| 18 | #ifndef LLVM_CLANG_AST_TYPEORDERING_H |
| 19 | #define LLVM_CLANG_AST_TYPEORDERING_H |
| 20 | |
| 21 | #include "clang/AST/CanonicalType.h" |
| 22 | #include "clang/AST/Type.h" |
| 23 | #include <functional> |
| 24 | |
| 25 | namespace clang { |
| 26 | |
| 27 | /// Function object that provides a total ordering on QualType values. |
| 28 | struct QualTypeOrdering { |
| 29 | bool operator()(QualType T1, QualType T2) const { |
| 30 | return std::less<void*>()(T1.getAsOpaquePtr(), T2.getAsOpaquePtr()); |
| 31 | } |
| 32 | }; |
| 33 | |
| 34 | } |
| 35 | |
| 36 | namespace llvm { |
| 37 | template<class> struct DenseMapInfo; |
| 38 | |
| 39 | template<> struct DenseMapInfo<clang::QualType> { |
| 40 | static inline clang::QualType getEmptyKey() { return clang::QualType(); } |
| 41 | |
| 42 | static inline clang::QualType getTombstoneKey() { |
| 43 | using clang::QualType; |
| 44 | return QualType::getFromOpaquePtr(reinterpret_cast<clang::Type *>(-1)); |
| 45 | } |
| 46 | |
| 47 | static unsigned getHashValue(clang::QualType Val) { |
| 48 | return (unsigned)((uintptr_t)Val.getAsOpaquePtr()) ^ |
| 49 | ((unsigned)((uintptr_t)Val.getAsOpaquePtr() >> 9)); |
| 50 | } |
| 51 | |
| 52 | static bool isEqual(clang::QualType LHS, clang::QualType RHS) { |
| 53 | return LHS == RHS; |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | template<> struct DenseMapInfo<clang::CanQualType> { |
| 58 | static inline clang::CanQualType getEmptyKey() { |
| 59 | return clang::CanQualType(); |
| 60 | } |
| 61 | |
| 62 | static inline clang::CanQualType getTombstoneKey() { |
| 63 | using clang::CanQualType; |
| 64 | return CanQualType::getFromOpaquePtr(reinterpret_cast<clang::Type *>(-1)); |
| 65 | } |
| 66 | |
| 67 | static unsigned getHashValue(clang::CanQualType Val) { |
| 68 | return (unsigned)((uintptr_t)Val.getAsOpaquePtr()) ^ |
| 69 | ((unsigned)((uintptr_t)Val.getAsOpaquePtr() >> 9)); |
| 70 | } |
| 71 | |
| 72 | static bool isEqual(clang::CanQualType LHS, clang::CanQualType RHS) { |
| 73 | return LHS == RHS; |
| 74 | } |
| 75 | }; |
| 76 | } |
| 77 | |
| 78 | #endif |
| 79 |