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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44227 91177308-0d34-0410-b5e6-96231b3b80d8
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
//===- TGLexer.h - Lexer for TableGen Files ---------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class represents the Lexer for tablegen files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TGLEXER_H
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#define TGLEXER_H
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#include <vector>
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#include <string>
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#include <iosfwd>
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namespace llvm {
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class MemoryBuffer;
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class TGLexer {
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const char *CurPtr;
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unsigned CurLineNo;
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MemoryBuffer *CurBuf;
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/// IncludeRec / IncludeStack - This captures the current set of include
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/// directives we are nested within.
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struct IncludeRec {
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MemoryBuffer *Buffer;
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const char *CurPtr;
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unsigned LineNo;
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IncludeRec(MemoryBuffer *buffer, const char *curPtr, unsigned lineNo)
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: Buffer(buffer), CurPtr(curPtr), LineNo(lineNo) {}
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};
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std::vector<IncludeRec> IncludeStack;
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// IncludeDirectories - This is the list of directories we should search for
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// include files in.
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std::vector<std::string> IncludeDirectories;
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const char *TokStart;
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public:
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TGLexer(MemoryBuffer *StartBuf);
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~TGLexer();
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void setIncludeDirs(const std::vector<std::string> &Dirs) {
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IncludeDirectories = Dirs;
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}
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int LexToken();
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typedef const char* LocationTy;
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LocationTy getTokenStart() const { return TokStart; }
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void PrintError(LocationTy Loc, const std::string &Msg) const;
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std::ostream &err() const;
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void PrintIncludeStack(std::ostream &OS) const;
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private:
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int ReturnError(const char *Loc, const std::string &Msg);
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int getNextChar();
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void SkipBCPLComment();
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bool SkipCComment();
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int LexIdentifier();
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bool LexInclude();
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int LexString();
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int LexVarName();
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int LexNumber();
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int LexBracket();
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int LexExclaim();
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};
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} // end namespace llvm
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#endif
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