1 //===-- llvm/MC/MCAsmParser.h - Abstract Asm Parser Interface ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_MC_MCASMPARSER_H
11 #define LLVM_MC_MCASMPARSER_H
13 #include "llvm/Support/DataTypes.h"
14 #include "llvm/ADT/ArrayRef.h"
20 class MCAsmParserExtension;
25 class MCParsedAsmOperand;
27 class MCTargetAsmParser;
34 /// MCAsmParserSemaCallback - Generic Sema callback for assembly parser.
35 class MCAsmParserSemaCallback {
37 virtual void *LookupInlineAsmIdentifier(StringRef Name, void *Loc) = 0;
40 /// MCAsmParser - Generic assembler parser interface, for use by target specific
44 typedef bool (*DirectiveHandler)(MCAsmParserExtension*, StringRef, SMLoc);
47 MCAsmParser(const MCAsmParser &) LLVM_DELETED_FUNCTION;
48 void operator=(const MCAsmParser &) LLVM_DELETED_FUNCTION;
50 MCTargetAsmParser *TargetParser;
52 unsigned ShowParsedOperands : 1;
54 protected: // Can only create subclasses.
58 virtual ~MCAsmParser();
60 virtual void AddDirectiveHandler(MCAsmParserExtension *Object,
62 DirectiveHandler Handler) = 0;
64 virtual SourceMgr &getSourceManager() = 0;
66 virtual MCAsmLexer &getLexer() = 0;
68 virtual MCContext &getContext() = 0;
70 /// getStreamer - Return the output streamer for the assembler.
71 virtual MCStreamer &getStreamer() = 0;
73 MCTargetAsmParser &getTargetParser() const { return *TargetParser; }
74 void setTargetParser(MCTargetAsmParser &P);
76 virtual unsigned getAssemblerDialect() { return 0;}
77 virtual void setAssemblerDialect(unsigned i) { }
79 bool getShowParsedOperands() const { return ShowParsedOperands; }
80 void setShowParsedOperands(bool Value) { ShowParsedOperands = Value; }
82 /// Run - Run the parser on the input source buffer.
83 virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false) = 0;
85 virtual void setParsingInlineAsm(bool V) = 0;
86 virtual bool isParsingInlineAsm() = 0;
88 /// ParseMSInlineAsm - Parse ms-style inline assembly.
89 virtual bool ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
90 unsigned &NumOutputs, unsigned &NumInputs,
91 SmallVectorImpl<void *> &OpDecls,
92 SmallVectorImpl<std::string> &Constraints,
93 SmallVectorImpl<std::string> &Clobbers,
94 const MCInstrInfo *MII,
95 const MCInstPrinter *IP,
96 MCAsmParserSemaCallback &SI) = 0;
98 /// ParseStatement - Parse the next statement.
99 virtual bool ParseStatement() = 0;
101 /// Warning - Emit a warning at the location \p L, with the message \p Msg.
103 /// \return The return value is true, if warnings are fatal.
104 virtual bool Warning(SMLoc L, const Twine &Msg,
105 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>()) = 0;
107 /// Error - Emit an error at the location \p L, with the message \p Msg.
109 /// \return The return value is always true, as an idiomatic convenience to
111 virtual bool Error(SMLoc L, const Twine &Msg,
112 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>()) = 0;
114 /// Lex - Get the next AsmToken in the stream, possibly handling file
116 virtual const AsmToken &Lex() = 0;
118 /// getTok - Get the current AsmToken from the stream.
119 const AsmToken &getTok();
121 /// \brief Report an error at the current lexer location.
122 bool TokError(const Twine &Msg,
123 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
125 /// ParseIdentifier - Parse an identifier or string (as a quoted identifier)
126 /// and set \p Res to the identifier contents.
127 virtual bool ParseIdentifier(StringRef &Res) = 0;
129 /// \brief Parse up to the end of statement and return the contents from the
130 /// current token until the end of the statement; the current token on exit
131 /// will be either the EndOfStatement or EOF.
132 virtual StringRef ParseStringToEndOfStatement() = 0;
134 /// EatToEndOfStatement - Skip to the end of the current statement, for error
136 virtual void EatToEndOfStatement() = 0;
138 /// ParseExpression - Parse an arbitrary expression.
140 /// @param Res - The value of the expression. The result is undefined
142 /// @result - False on success.
143 virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
144 bool ParseExpression(const MCExpr *&Res);
146 /// ParseParenExpression - Parse an arbitrary expression, assuming that an
147 /// initial '(' has already been consumed.
149 /// @param Res - The value of the expression. The result is undefined
151 /// @result - False on success.
152 virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) = 0;
154 /// ParseAbsoluteExpression - Parse an expression which must evaluate to an
157 /// @param Res - The value of the absolute expression. The result is undefined
159 /// @result - False on success.
160 virtual bool ParseAbsoluteExpression(int64_t &Res) = 0;
163 /// \brief Create an MCAsmParser instance.
164 MCAsmParser *createMCAsmParser(SourceMgr &, MCContext &,
165 MCStreamer &, const MCAsmInfo &);
167 } // End llvm namespace