1 //===--- LangOptions.h - C Language Family Language Options -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// 10 /// \file 11 /// \brief Defines the clang::LangOptions interface. 12 /// 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_CLANG_LANGOPTIONS_H 16 #define LLVM_CLANG_LANGOPTIONS_H 17 18 #include "clang/Basic/CommentOptions.h" 19 #include "clang/Basic/LLVM.h" 20 #include "clang/Basic/ObjCRuntime.h" 21 #include "clang/Basic/Visibility.h" 22 #include <string> 23 24 namespace clang { 25 26 struct SanitizerOptions { 27 #define SANITIZER(NAME, ID) unsigned ID : 1; 28 #include "clang/Basic/Sanitizers.def" 29 30 /// \brief Cached set of sanitizer options with all sanitizers disabled. 31 static const SanitizerOptions Disabled; 32 }; 33 34 /// Bitfields of LangOptions, split out from LangOptions in order to ensure that 35 /// this large collection of bitfields is a trivial class type. 36 class LangOptionsBase { 37 public: 38 // Define simple language options (with no accessors). 39 #define LANGOPT(Name, Bits, Default, Description) unsigned Name : Bits; 40 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) 41 #include "clang/Basic/LangOptions.def" 42 43 SanitizerOptions Sanitize; 44 protected: 45 // Define language options of enumeration type. These are private, and will 46 // have accessors (below). 47 #define LANGOPT(Name, Bits, Default, Description) 48 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ 49 unsigned Name : Bits; 50 #include "clang/Basic/LangOptions.def" 51 }; 52 53 /// \brief Keeps track of the various options that can be 54 /// enabled, which controls the dialect of C or C++ that is accepted. 55 class LangOptions : public LangOptionsBase { 56 public: 57 typedef clang::Visibility Visibility; 58 59 enum GCMode { NonGC, GCOnly, HybridGC }; 60 enum StackProtectorMode { SSPOff, SSPOn, SSPStrong, SSPReq }; 61 62 enum SignedOverflowBehaviorTy { 63 SOB_Undefined, // Default C standard behavior. 64 SOB_Defined, // -fwrapv 65 SOB_Trapping // -ftrapv 66 }; 67 68 enum PragmaMSPointersToMembersKind { 69 PPTMK_BestCase, 70 PPTMK_FullGeneralitySingleInheritance, 71 PPTMK_FullGeneralityMultipleInheritance, 72 PPTMK_FullGeneralityVirtualInheritance 73 }; 74 75 enum AddrSpaceMapMangling { ASMM_Target, ASMM_On, ASMM_Off }; 76 77 public: 78 clang::ObjCRuntime ObjCRuntime; 79 80 std::string ObjCConstantStringClass; 81 82 /// \brief The name of the handler function to be called when -ftrapv is 83 /// specified. 84 /// 85 /// If none is specified, abort (GCC-compatible behaviour). 86 std::string OverflowHandler; 87 88 /// \brief The name of the current module. 89 std::string CurrentModule; 90 91 /// \brief Options for parsing comments. 92 CommentOptions CommentOpts; 93 94 LangOptions(); 95 96 // Define accessors/mutators for language options of enumeration type. 97 #define LANGOPT(Name, Bits, Default, Description) 98 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ 99 Type get##Name() const { return static_cast<Type>(Name); } \ 100 void set##Name(Type Value) { Name = static_cast<unsigned>(Value); } 101 #include "clang/Basic/LangOptions.def" 102 isSignedOverflowDefined()103 bool isSignedOverflowDefined() const { 104 return getSignedOverflowBehavior() == SOB_Defined; 105 } 106 isSubscriptPointerArithmetic()107 bool isSubscriptPointerArithmetic() const { 108 return ObjCRuntime.isSubscriptPointerArithmetic() && 109 !ObjCSubscriptingLegacyRuntime; 110 } 111 112 /// \brief Reset all of the options that are not considered when building a 113 /// module. 114 void resetNonModularOptions(); 115 }; 116 117 /// \brief Floating point control options 118 class FPOptions { 119 public: 120 unsigned fp_contract : 1; 121 FPOptions()122 FPOptions() : fp_contract(0) {} 123 FPOptions(const LangOptions & LangOpts)124 FPOptions(const LangOptions &LangOpts) : 125 fp_contract(LangOpts.DefaultFPContract) {} 126 }; 127 128 /// \brief OpenCL volatile options 129 class OpenCLOptions { 130 public: 131 #define OPENCLEXT(nm) unsigned nm : 1; 132 #include "clang/Basic/OpenCLExtensions.def" 133 OpenCLOptions()134 OpenCLOptions() { 135 #define OPENCLEXT(nm) nm = 0; 136 #include "clang/Basic/OpenCLExtensions.def" 137 } 138 }; 139 140 /// \brief Describes the kind of translation unit being processed. 141 enum TranslationUnitKind { 142 /// \brief The translation unit is a complete translation unit. 143 TU_Complete, 144 /// \brief The translation unit is a prefix to a translation unit, and is 145 /// not complete. 146 TU_Prefix, 147 /// \brief The translation unit is a module. 148 TU_Module 149 }; 150 151 } // end namespace clang 152 153 #endif 154