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104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
//===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCASMPARSER_H
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#define LLVM_MC_MCASMPARSER_H
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#include "llvm/System/DataTypes.h"
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namespace llvm {
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class AsmToken;
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class MCAsmLexer;
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class MCAsmParserExtension;
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class MCContext;
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class MCExpr;
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class MCStreamer;
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class SMLoc;
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class SourceMgr;
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class StringRef;
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class Twine;
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/// MCAsmParser - Generic assembler parser interface, for use by target specific
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/// assembly parsers.
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class MCAsmParser {
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public:
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typedef bool (MCAsmParserExtension::*DirectiveHandler)(StringRef, SMLoc);
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private:
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MCAsmParser(const MCAsmParser &); // DO NOT IMPLEMENT
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void operator=(const MCAsmParser &); // DO NOT IMPLEMENT
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protected: // Can only create subclasses.
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MCAsmParser();
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public:
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virtual ~MCAsmParser();
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virtual void AddDirectiveHandler(MCAsmParserExtension *Object,
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StringRef Directive,
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DirectiveHandler Handler) = 0;
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virtual SourceMgr &getSourceManager() = 0;
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virtual MCAsmLexer &getLexer() = 0;
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virtual MCContext &getContext() = 0;
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/// getStreamer - Return the output streamer for the assembler.
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virtual MCStreamer &getStreamer() = 0;
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/// Warning - Emit a warning at the location \arg L, with the message \arg
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/// Msg.
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virtual void Warning(SMLoc L, const Twine &Msg) = 0;
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/// Error - Emit an error at the location \arg L, with the message \arg
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/// Msg.
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///
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/// \return The return value is always true, as an idiomatic convenience to
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/// clients.
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virtual bool Error(SMLoc L, const Twine &Msg) = 0;
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/// Lex - Get the next AsmToken in the stream, possibly handling file
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/// inclusion first.
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virtual const AsmToken &Lex() = 0;
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/// getTok - Get the current AsmToken from the stream.
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const AsmToken &getTok();
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/// \brief Report an error at the current lexer location.
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bool TokError(const char *Msg);
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/// ParseExpression - Parse an arbitrary expression.
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///
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/// @param Res - The value of the expression. The result is undefined
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/// on error.
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/// @result - False on success.
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virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
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bool ParseExpression(const MCExpr *&Res);
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/// ParseParenExpression - Parse an arbitrary expression, assuming that an
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/// initial '(' has already been consumed.
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///
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/// @param Res - The value of the expression. The result is undefined
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/// on error.
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/// @result - False on success.
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virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
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/// ParseAbsoluteExpression - Parse an expression which must evaluate to an
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/// absolute value.
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///
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/// @param Res - The value of the absolute expression. The result is undefined
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/// on error.
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/// @result - False on success.
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virtual bool ParseAbsoluteExpression(int64_t &Res) = 0;
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};
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} // End llvm namespace
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#endif
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