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e240beb065
generic MCAsmParser interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77381 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
2.3 KiB
C++
75 lines
2.3 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/Support/DataTypes.h"
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namespace llvm {
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class MCAsmLexer;
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class MCValue;
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class SMLoc;
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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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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 MCAsmLexer &getLexer() = 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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/// Warning - 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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/// 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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/// ParseRelocatableExpression - Parse an expression which must be
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/// relocatable.
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///
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/// @param Res - The relocatable expression value. The result is undefined on
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/// error.
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/// @result - False on success.
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virtual bool ParseRelocatableExpression(MCValue &Res) = 0;
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/// ParseParenRelocatableExpression - Parse an expression which must be
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/// relocatable, assuming that an initial '(' has already been consumed.
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///
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/// @param Res - The relocatable expression value. The result is undefined on
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/// error.
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/// @result - False on success.
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///
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/// @see ParseRelocatableExpression, ParseParenExpr.
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virtual bool ParseParenRelocatableExpression(MCValue &Res) = 0;
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};
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} // End llvm namespace
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#endif
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