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      1 //===--- LangStandard.h -----------------------------------------*- 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 #ifndef LLVM_CLANG_FRONTEND_LANGSTANDARD_H
     11 #define LLVM_CLANG_FRONTEND_LANGSTANDARD_H
     12 
     13 #include "clang/Basic/LLVM.h"
     14 #include "llvm/ADT/StringRef.h"
     15 
     16 namespace clang {
     17 
     18 namespace frontend {
     19 
     20 enum LangFeatures {
     21   LineComment = (1 << 0),
     22   C89 = (1 << 1),
     23   C99 = (1 << 2),
     24   C11 = (1 << 3),
     25   CPlusPlus = (1 << 4),
     26   CPlusPlus11 = (1 << 5),
     27   CPlusPlus14 = (1 << 6),
     28   CPlusPlus1z = (1 << 7),
     29   Digraphs = (1 << 8),
     30   GNUMode = (1 << 9),
     31   HexFloat = (1 << 10),
     32   ImplicitInt = (1 << 11)
     33 };
     34 
     35 }
     36 
     37 /// LangStandard - Information about the properties of a particular language
     38 /// standard.
     39 struct LangStandard {
     40   enum Kind {
     41 #define LANGSTANDARD(id, name, desc, features) \
     42     lang_##id,
     43 #include "clang/Frontend/LangStandards.def"
     44     lang_unspecified
     45   };
     46 
     47   const char *ShortName;
     48   const char *Description;
     49   unsigned Flags;
     50 
     51 public:
     52   /// getName - Get the name of this standard.
     53   const char *getName() const { return ShortName; }
     54 
     55   /// getDescription - Get the description of this standard.
     56   const char *getDescription() const { return Description; }
     57 
     58   /// Language supports '//' comments.
     59   bool hasLineComments() const { return Flags & frontend::LineComment; }
     60 
     61   /// isC89 - Language is a superset of C89.
     62   bool isC89() const { return Flags & frontend::C89; }
     63 
     64   /// isC99 - Language is a superset of C99.
     65   bool isC99() const { return Flags & frontend::C99; }
     66 
     67   /// isC11 - Language is a superset of C11.
     68   bool isC11() const { return Flags & frontend::C11; }
     69 
     70   /// isCPlusPlus - Language is a C++ variant.
     71   bool isCPlusPlus() const { return Flags & frontend::CPlusPlus; }
     72 
     73   /// isCPlusPlus11 - Language is a C++11 variant (or later).
     74   bool isCPlusPlus11() const { return Flags & frontend::CPlusPlus11; }
     75 
     76   /// isCPlusPlus14 - Language is a C++14 variant (or later).
     77   bool isCPlusPlus14() const { return Flags & frontend::CPlusPlus14; }
     78 
     79   /// isCPlusPlus1z - Language is a C++17 variant (or later).
     80   bool isCPlusPlus1z() const { return Flags & frontend::CPlusPlus1z; }
     81 
     82   /// hasDigraphs - Language supports digraphs.
     83   bool hasDigraphs() const { return Flags & frontend::Digraphs; }
     84 
     85   /// isGNUMode - Language includes GNU extensions.
     86   bool isGNUMode() const { return Flags & frontend::GNUMode; }
     87 
     88   /// hasHexFloats - Language supports hexadecimal float constants.
     89   bool hasHexFloats() const { return Flags & frontend::HexFloat; }
     90 
     91   /// hasImplicitInt - Language allows variables to be typed as int implicitly.
     92   bool hasImplicitInt() const { return Flags & frontend::ImplicitInt; }
     93 
     94   static const LangStandard &getLangStandardForKind(Kind K);
     95   static const LangStandard *getLangStandardForName(StringRef Name);
     96 };
     97 
     98 }  // end namespace clang
     99 
    100 #endif
    101