1 //===- TGLexer.h - Lexer for TableGen Files ---------------------*- 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 // This class represents the Lexer for tablegen files.
12 //===----------------------------------------------------------------------===//
17 #include "llvm/Support/DataTypes.h"
33 // Tokens with no info.
35 l_square, r_square, // [ ]
36 l_brace, r_brace, // { }
37 l_paren, r_paren, // ( )
41 equal, question, // = ?
44 Bit, Bits, Class, Code, Dag, Def, Defm, Field, In, Int, Let, List,
48 XConcat, XSRA, XSRL, XSHL, XStrConcat, XNameConcat, XCast, XSubst,
54 // String valued tokens.
55 Id, StrVal, VarName, CodeFragment
59 /// TGLexer - TableGen Lexer class.
64 const MemoryBuffer *CurBuf;
66 // Information about the current token.
68 tgtok::TokKind CurCode;
69 std::string CurStrVal; // This is valid for ID, STRVAL, VARNAME, CODEFRAGMENT
70 int64_t CurIntVal; // This is valid for INTVAL.
72 /// CurBuffer - This is the current buffer index we're lexing from as managed
73 /// by the SourceMgr object.
76 // IncludeDirectories - This is the list of directories we should search for
78 std::vector<std::string> IncludeDirectories;
80 TGLexer(TGSourceMgr &SrcMgr);
83 void setIncludeDirs(const std::vector<std::string> &Dirs) {
84 IncludeDirectories = Dirs;
87 tgtok::TokKind Lex() {
88 return CurCode = LexToken();
91 tgtok::TokKind getCode() const { return CurCode; }
93 const std::string &getCurStrVal() const {
94 assert((CurCode == tgtok::Id || CurCode == tgtok::StrVal ||
95 CurCode == tgtok::VarName || CurCode == tgtok::CodeFragment) &&
96 "This token doesn't have a string value");
99 int64_t getCurIntVal() const {
100 assert(CurCode == tgtok::IntVal && "This token isn't an integer");
104 TGLoc getLoc() const;
106 void PrintError(const char *Loc, const std::string &Msg) const;
107 void PrintError(TGLoc Loc, const std::string &Msg) const;
110 /// LexToken - Read the next token and return its code.
111 tgtok::TokKind LexToken();
113 tgtok::TokKind ReturnError(const char *Loc, const std::string &Msg);
116 void SkipBCPLComment();
118 tgtok::TokKind LexIdentifier();
120 tgtok::TokKind LexString();
121 tgtok::TokKind LexVarName();
122 tgtok::TokKind LexNumber();
123 tgtok::TokKind LexBracket();
124 tgtok::TokKind LexExclaim();
127 } // end namespace llvm