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Record the start of the current token, for use in error reporting.

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llvm-svn: 44227
This commit is contained in:
Chris Lattner 2007-11-19 07:43:52 +00:00
parent b5d55431b7
commit 4de076fe41
2 changed files with 11 additions and 6 deletions
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11
utils/TableGen/TGLexer.cpp
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@ -27,6 +27,7 @@ using namespace llvm;
TGLexer::TGLexer(MemoryBuffer *StartBuf) : CurLineNo(1), CurBuf(StartBuf) {
CurPtr = CurBuf->getBufferStart();
TokStart = 0;
}
TGLexer::~TGLexer() {
@ -76,8 +77,7 @@ void TGLexer::PrintError(const char *ErrorLoc, const std::string &Msg) const {
// Print out the line.
cerr << std::string(LineStart, LineEnd) << "\n";
// Print out spaces before the carat.
const char *Pos = LineStart;
while (Pos != ErrorLoc)
for (const char *Pos = LineStart; Pos != ErrorLoc; ++Pos)
cerr << (*Pos == '\t' ? '\t' : ' ');
cerr << "^\n";
}
@ -122,6 +122,7 @@ int TGLexer::getNextChar() {
}
int TGLexer::LexToken() {
TokStart = CurPtr;
// This always consumes at least one character.
int CurChar = getNextChar();
@ -238,11 +239,10 @@ int TGLexer::LexIdentifier() {
/// comes next and enter the include.
bool TGLexer::LexInclude() {
// The token after the include must be a string.
const char *TokStart = CurPtr-7;
int Tok = LexToken();
if (Tok == YYERROR) return true;
if (Tok != STRVAL) {
PrintError(TokStart, "Expected filename after include");
PrintError(getTokenStart(), "Expected filename after include");
return true;
}
@ -260,7 +260,8 @@ bool TGLexer::LexInclude() {
}
if (NewBuf == 0) {
PrintError(TokStart, "Could not find include file '" + Filename + "'");
PrintError(getTokenStart(),
"Could not find include file '" + Filename + "'");
return true;
}

6
utils/TableGen/TGLexer.h
View File

@ -40,6 +40,7 @@ class TGLexer {
// IncludeDirectories - This is the list of directories we should search for
// include files in.
std::vector<std::string> IncludeDirectories;
const char *TokStart;
public:
TGLexer(MemoryBuffer *StartBuf);
~TGLexer();
@ -50,7 +51,10 @@ public:
int LexToken();
void PrintError(const char *Loc, const std::string &Msg) const;
typedef const char* LocationTy;
LocationTy getTokenStart() const { return TokStart; }
void PrintError(LocationTy Loc, const std::string &Msg) const;
std::ostream &err() const;
void PrintIncludeStack(std::ostream &OS) const;