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//===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCASMPARSER_H
#define LLVM_MC_MCASMPARSER_H
#include "llvm/Support/DataTypes.h"
namespace llvm {
class AsmToken;
class MCAsmInfo;
class MCAsmLexer;
class MCAsmParserExtension;
class MCContext;
class MCExpr;
class MCStreamer;
class SMLoc;
class SourceMgr;
class StringRef;
class Target;
class TargetAsmParser;
class Twine;
/// MCAsmParser - Generic assembler parser interface, for use by target specific
/// assembly parsers.
class MCAsmParser {
public:
typedef bool (*DirectiveHandler)(MCAsmParserExtension*, StringRef, SMLoc);
private:
MCAsmParser(const MCAsmParser &); // DO NOT IMPLEMENT
void operator=(const MCAsmParser &); // DO NOT IMPLEMENT
TargetAsmParser *TargetParser;
unsigned ShowParsedOperands : 1;
protected: // Can only create subclasses.
MCAsmParser();
public:
virtual ~MCAsmParser();
virtual void AddDirectiveHandler(MCAsmParserExtension *Object,
StringRef Directive,
DirectiveHandler Handler) = 0;
virtual SourceMgr &getSourceManager() = 0;
virtual MCAsmLexer &getLexer() = 0;
virtual MCContext &getContext() = 0;
/// getStreamer - Return the output streamer for the assembler.
virtual MCStreamer &getStreamer() = 0;
TargetAsmParser &getTargetParser() const { return *TargetParser; }
void setTargetParser(TargetAsmParser &P);
bool getShowParsedOperands() const { return ShowParsedOperands; }
void setShowParsedOperands(bool Value) { ShowParsedOperands = Value; }
/// Run - Run the parser on the input source buffer.
virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false) = 0;
/// Warning - Emit a warning at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is true, if warnings are fatal.
virtual bool Warning(SMLoc L, const Twine &Msg) = 0;
/// Error - Emit an error at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
virtual bool Error(SMLoc L, const Twine &Msg) = 0;
/// Lex - Get the next AsmToken in the stream, possibly handling file
/// inclusion first.
virtual const AsmToken &Lex() = 0;
/// getTok - Get the current AsmToken from the stream.
const AsmToken &getTok();
/// \brief Report an error at the current lexer location.
bool TokError(const Twine &Msg);
/// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
/// and set \arg Res to the identifier contents.
virtual bool ParseIdentifier(StringRef &Res) = 0;
/// \brief Parse up to the end of statement and return the contents from the
/// current token until the end of the statement; the current token on exit
/// will be either the EndOfStatement or EOF.
virtual StringRef ParseStringToEndOfStatement() = 0;
/// EatToEndOfStatement - Skip to the end of the current statement, for error
/// recovery.
virtual void EatToEndOfStatement() = 0;
/// ParseExpression - Parse an arbitrary expression.
///
/// @param Res - The value of the expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
bool ParseExpression(const MCExpr *&Res);
/// ParseParenExpression - Parse an arbitrary expression, assuming that an
/// initial '(' has already been consumed.
///
/// @param Res - The value of the expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
/// ParseAbsoluteExpression - Parse an expression which must evaluate to an
/// absolute value.
///
/// @param Res - The value of the absolute expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool ParseAbsoluteExpression(int64_t &Res) = 0;
};
/// \brief Create an MCAsmParser instance.
MCAsmParser *createMCAsmParser(const Target &, SourceMgr &, MCContext &,
MCStreamer &, const MCAsmInfo &);
} // End llvm namespace
#endif
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