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  1. //===- llvm/MC/MCAsmParserExtension.h - Asm Parser Hooks --------*- 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. #ifndef LLVM_MC_MCPARSER_MCASMPARSEREXTENSION_H
  10. #define LLVM_MC_MCPARSER_MCASMPARSEREXTENSION_H
  11.  
  12. #include "llvm/ADT/STLFunctionalExtras.h"
  13. #include "llvm/ADT/StringRef.h"
  14. #include "llvm/MC/MCParser/MCAsmParser.h"
  15. #include "llvm/Support/SMLoc.h"
  16.  
  17. namespace llvm {
  18.  
  19. class Twine;
  20.  
  21. /// Generic interface for extending the MCAsmParser,
  22. /// which is implemented by target and object file assembly parser
  23. /// implementations.
  24. class MCAsmParserExtension {
  25.   MCAsmParser *Parser;
  26.  
  27. protected:
  28.   MCAsmParserExtension();
  29.  
  30.   // Helper template for implementing static dispatch functions.
  31.   template<typename T, bool (T::*Handler)(StringRef, SMLoc)>
  32.   static bool HandleDirective(MCAsmParserExtension *Target,
  33.                               StringRef Directive,
  34.                               SMLoc DirectiveLoc) {
  35.     T *Obj = static_cast<T*>(Target);
  36.     return (Obj->*Handler)(Directive, DirectiveLoc);
  37.   }
  38.  
  39.   bool BracketExpressionsSupported = false;
  40.  
  41. public:
  42.   MCAsmParserExtension(const MCAsmParserExtension &) = delete;
  43.   MCAsmParserExtension &operator=(const MCAsmParserExtension &) = delete;
  44.   virtual ~MCAsmParserExtension();
  45.  
  46.   /// Initialize the extension for parsing using the given \p Parser.
  47.   /// The extension should use the AsmParser interfaces to register its
  48.   /// parsing routines.
  49.   virtual void Initialize(MCAsmParser &Parser);
  50.  
  51.   /// \name MCAsmParser Proxy Interfaces
  52.   /// @{
  53.  
  54.   MCContext &getContext() { return getParser().getContext(); }
  55.  
  56.   MCAsmLexer &getLexer() { return getParser().getLexer(); }
  57.   const MCAsmLexer &getLexer() const {
  58.     return const_cast<MCAsmParserExtension *>(this)->getLexer();
  59.   }
  60.  
  61.   MCAsmParser &getParser() { return *Parser; }
  62.   const MCAsmParser &getParser() const {
  63.     return const_cast<MCAsmParserExtension*>(this)->getParser();
  64.   }
  65.  
  66.   SourceMgr &getSourceManager() { return getParser().getSourceManager(); }
  67.   MCStreamer &getStreamer() { return getParser().getStreamer(); }
  68.  
  69.   bool Warning(SMLoc L, const Twine &Msg) {
  70.     return getParser().Warning(L, Msg);
  71.   }
  72.  
  73.   bool Error(SMLoc L, const Twine &Msg, SMRange Range = SMRange()) {
  74.     return getParser().Error(L, Msg, Range);
  75.   }
  76.  
  77.   void Note(SMLoc L, const Twine &Msg) {
  78.     getParser().Note(L, Msg);
  79.   }
  80.  
  81.   bool TokError(const Twine &Msg) {
  82.     return getParser().TokError(Msg);
  83.   }
  84.  
  85.   const AsmToken &Lex() { return getParser().Lex(); }
  86.   const AsmToken &getTok() { return getParser().getTok(); }
  87.   bool parseToken(AsmToken::TokenKind T,
  88.                   const Twine &Msg = "unexpected token") {
  89.     return getParser().parseToken(T, Msg);
  90.   }
  91.   bool parseEOL() { return getParser().parseEOL(); }
  92.  
  93.   bool parseMany(function_ref<bool()> parseOne, bool hasComma = true) {
  94.     return getParser().parseMany(parseOne, hasComma);
  95.   }
  96.  
  97.   bool parseOptionalToken(AsmToken::TokenKind T) {
  98.     return getParser().parseOptionalToken(T);
  99.   }
  100.  
  101.   bool ParseDirectiveCGProfile(StringRef, SMLoc);
  102.  
  103.   bool check(bool P, const Twine &Msg) {
  104.     return getParser().check(P, Msg);
  105.   }
  106.  
  107.   bool check(bool P, SMLoc Loc, const Twine &Msg) {
  108.     return getParser().check(P, Loc, Msg);
  109.   }
  110.  
  111.   bool addErrorSuffix(const Twine &Suffix) {
  112.     return getParser().addErrorSuffix(Suffix);
  113.   }
  114.  
  115.   bool HasBracketExpressions() const { return BracketExpressionsSupported; }
  116.  
  117.   /// @}
  118. };
  119.  
  120. } // end namespace llvm
  121.  
  122. #endif // LLVM_MC_MCPARSER_MCASMPARSEREXTENSION_H
  123.