void TextDiagnosticPrinter::EmitCaretDiagnostic(SourceLocation Loc,
SourceRange *Ranges,
unsigned NumRanges,
SourceManager &SM,
const CodeModificationHint *Hints,
unsigned NumHints,
unsigned Columns) {
assert(LangOpts && "Unexpected diagnostic outside source file processing");
assert(!Loc.isInvalid() && "must have a valid source location here");
// If this is a macro ID, first emit information about where this was
// instantiated (recursively) then emit information about where the token was
// spelled from.
if (!Loc.isFileID()) {
SourceLocation OneLevelUp = SM.getImmediateInstantiationRange(Loc).first;
// FIXME: Map ranges?
EmitCaretDiagnostic(OneLevelUp, Ranges, NumRanges, SM, 0, 0, Columns);
// Map the location.
Loc = SM.getImmediateSpellingLoc(Loc);
// Map the ranges.
for (unsigned i = 0; i != NumRanges; ++i) {
SourceLocation S = Ranges[i].getBegin(), E = Ranges[i].getEnd();
if (S.isMacroID()) S = SM.getImmediateSpellingLoc(S);
if (E.isMacroID()) E = SM.getImmediateSpellingLoc(E);
Ranges[i] = SourceRange(S, E);
}
// Get the pretty name, according to #line directives etc.
PresumedLoc PLoc = SM.getPresumedLoc(Loc);
// If this diagnostic is not in the main file, print out the "included from"
// lines.
if (LastWarningLoc != PLoc.getIncludeLoc()) {
LastWarningLoc = PLoc.getIncludeLoc();
PrintIncludeStack(LastWarningLoc, SM);
}
if (DiagOpts->ShowLocation) {
// Emit the file/line/column that this expansion came from.
OS << PLoc.getFilename() << ':' << PLoc.getLine() << ':';
if (DiagOpts->ShowColumn)
OS << PLoc.getColumn() << ':';
OS << ' ';
}
OS << "note: instantiated from:\n";
EmitCaretDiagnostic(Loc, Ranges, NumRanges, SM, Hints, NumHints, Columns);
return;
}
// Decompose the location into a FID/Offset pair.
std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
FileID FID = LocInfo.first;
unsigned FileOffset = LocInfo.second;
// Get information about the buffer it points into.
std::pair<const char*, const char*> BufferInfo = SM.getBufferData(FID);
const char *BufStart = BufferInfo.first;
unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
unsigned CaretEndColNo
= ColNo + Lexer::MeasureTokenLength(Loc, SM, *LangOpts);
// Rewind from the current position to the start of the line.
const char *TokPtr = BufStart+FileOffset;
const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based.
// Compute the line end. Scan forward from the error position to the end of
// the line.
const char *LineEnd = TokPtr;
while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0')
++LineEnd;
// FIXME: This shouldn't be necessary, but the CaretEndColNo can extend past
// the source line length as currently being computed. See
// test/Misc/message-length.c.
CaretEndColNo = std::min(CaretEndColNo, unsigned(LineEnd - LineStart));
// Copy the line of code into an std::string for ease of manipulation.
std::string SourceLine(LineStart, LineEnd);
// Create a line for the caret that is filled with spaces that is the same
// length as the line of source code.
std::string CaretLine(LineEnd-LineStart, ' ');
// Highlight all of the characters covered by Ranges with ~ characters.
if (NumRanges) {
unsigned LineNo = SM.getLineNumber(FID, FileOffset);
for (unsigned i = 0, e = NumRanges; i != e; ++i)
HighlightRange(Ranges[i], SM, LineNo, FID, CaretLine, SourceLine);
}
// Next, insert the caret itself.
if (ColNo-1 < CaretLine.size())
CaretLine[ColNo-1] = '^';
else
CaretLine.push_back('^');
// Scan the source line, looking for tabs. If we find any, manually expand
// them to spaces and update the CaretLine to match.
for (unsigned i = 0; i != SourceLine.size(); ++i) {
if (SourceLine[i] != '\t') continue;
// Replace this tab with at least one space.
SourceLine[i] = ' ';
// Compute the number of spaces we need to insert.
unsigned TabStop = DiagOpts->TabStop;
assert(0 < TabStop && TabStop <= DiagnosticOptions::MaxTabStop &&
"Invalid -ftabstop value");
unsigned NumSpaces = ((i+TabStop)/TabStop * TabStop) - (i+1);
assert(NumSpaces < TabStop && "Invalid computation of space amt");
// Insert spaces into the SourceLine.
SourceLine.insert(i+1, NumSpaces, ' ');
// Insert spaces or ~'s into CaretLine.
CaretLine.insert(i+1, NumSpaces, CaretLine[i] == '~' ? '~' : ' ');
}
// If we are in -fdiagnostics-print-source-range-info mode, we are trying to
// produce easily machine parsable output. Add a space before the source line
// and the caret to make it trivial to tell the main diagnostic line from what
// the user is intended to see.
if (DiagOpts->ShowSourceRanges) {
SourceLine = ' ' + SourceLine;
CaretLine = ' ' + CaretLine;
}
std::string FixItInsertionLine;
if (NumHints && DiagOpts->ShowFixits) {
for (const CodeModificationHint *Hint = Hints, *LastHint = Hints + NumHints;
Hint != LastHint; ++Hint) {
if (Hint->InsertionLoc.isValid()) {
// We have an insertion hint. Determine whether the inserted
// code is on the same line as the caret.
std::pair<FileID, unsigned> HintLocInfo
= SM.getDecomposedInstantiationLoc(Hint->InsertionLoc);
if (SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) ==
SM.getLineNumber(FID, FileOffset)) {
// Insert the new code into the line just below the code
// that the user wrote.
unsigned HintColNo
= SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second);
unsigned LastColumnModified
= HintColNo - 1 + Hint->CodeToInsert.size();
if (LastColumnModified > FixItInsertionLine.size())
FixItInsertionLine.resize(LastColumnModified, ' ');
std::copy(Hint->CodeToInsert.begin(), Hint->CodeToInsert.end(),
FixItInsertionLine.begin() + HintColNo - 1);
} else {
FixItInsertionLine.clear();
break;
}
}
}
// Now that we have the entire fixit line, expand the tabs in it.
// Since we don't want to insert spaces in the middle of a word,
// find each word and the column it should line up with and insert
// spaces until they match.
if (!FixItInsertionLine.empty()) {
unsigned FixItPos = 0;
unsigned LinePos = 0;
unsigned TabExpandedCol = 0;
unsigned LineLength = LineEnd - LineStart;
while (FixItPos < FixItInsertionLine.size() && LinePos < LineLength) {
// Find the next word in the FixIt line.
while (FixItPos < FixItInsertionLine.size() &&
FixItInsertionLine[FixItPos] == ' ')
++FixItPos;
unsigned CharDistance = FixItPos - TabExpandedCol;
// Walk forward in the source line, keeping track of
// the tab-expanded column.
for (unsigned I = 0; I < CharDistance; ++I, ++LinePos)
if (LinePos >= LineLength || LineStart[LinePos] != '\t')
++TabExpandedCol;
else
TabExpandedCol =
(TabExpandedCol/DiagOpts->TabStop + 1) * DiagOpts->TabStop;
// Adjust the fixit line to match this column.
FixItInsertionLine.insert(FixItPos, TabExpandedCol-FixItPos, ' ');
FixItPos = TabExpandedCol;
// Walk to the end of the word.
while (FixItPos < FixItInsertionLine.size() &&
FixItInsertionLine[FixItPos] != ' ')
++FixItPos;
}
}
}
// If the source line is too long for our terminal, select only the
// "interesting" source region within that line.
if (Columns && SourceLine.size() > Columns)
SelectInterestingSourceRegion(SourceLine, CaretLine, FixItInsertionLine,
CaretEndColNo, Columns);
// Finally, remove any blank spaces from the end of CaretLine.
while (CaretLine[CaretLine.size()-1] == ' ')
CaretLine.erase(CaretLine.end()-1);
// Emit what we have computed.
OS << SourceLine << '\n';
if (DiagOpts->ShowColors)
OS.changeColor(caretColor, true);
OS << CaretLine << '\n';
if (DiagOpts->ShowColors)
OS.resetColor();
if (!FixItInsertionLine.empty()) {
if (DiagOpts->ShowColors)
// Print fixit line in color
OS.changeColor(fixitColor, false);
if (DiagOpts->ShowSourceRanges)
OS << ' ';
OS << FixItInsertionLine << '\n';
if (DiagOpts->ShowColors)
OS.resetColor();
}
}
void TextDiagnosticPrinter::EmitCaretDiagnostic(SourceLocation Loc,
SourceRange *Ranges,
unsigned NumRanges,
SourceManager &SM,
const CodeModificationHint *Hints,
unsigned NumHints,
unsigned Columns) {
assert(!Loc.isInvalid() && "must have a valid source location here");
// If this is a macro ID, first emit information about where this was
// instantiated (recursively) then emit information about where. the token was
// spelled from.
if (!Loc.isFileID()) {
SourceLocation OneLevelUp = SM.getImmediateInstantiationRange(Loc).first;
// FIXME: Map ranges?
EmitCaretDiagnostic(OneLevelUp, Ranges, NumRanges, SM, 0, 0, Columns);
Loc = SM.getImmediateSpellingLoc(Loc);
// Map the ranges.
for (unsigned i = 0; i != NumRanges; ++i) {
SourceLocation S = Ranges[i].getBegin(), E = Ranges[i].getEnd();
if (S.isMacroID()) S = SM.getImmediateSpellingLoc(S);
if (E.isMacroID()) E = SM.getImmediateSpellingLoc(E);
Ranges[i] = SourceRange(S, E);
}
if (ShowLocation) {
std::pair<FileID, unsigned> IInfo = SM.getDecomposedInstantiationLoc(Loc);
// Emit the file/line/column that this expansion came from.
OS << SM.getBuffer(IInfo.first)->getBufferIdentifier() << ':'
<< SM.getLineNumber(IInfo.first, IInfo.second) << ':';
if (ShowColumn)
OS << SM.getColumnNumber(IInfo.first, IInfo.second) << ':';
OS << ' ';
}
OS << "note: instantiated from:\n";
EmitCaretDiagnostic(Loc, Ranges, NumRanges, SM, Hints, NumHints, Columns);
return;
}
// Decompose the location into a FID/Offset pair.
std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
FileID FID = LocInfo.first;
unsigned FileOffset = LocInfo.second;
// Get information about the buffer it points into.
std::pair<const char*, const char*> BufferInfo = SM.getBufferData(FID);
const char *BufStart = BufferInfo.first;
unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
unsigned CaretEndColNo
= ColNo + Lexer::MeasureTokenLength(Loc, SM, *LangOpts);
// Rewind from the current position to the start of the line.
const char *TokPtr = BufStart+FileOffset;
const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based.
// Compute the line end. Scan forward from the error position to the end of
// the line.
const char *LineEnd = TokPtr;
while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0')
++LineEnd;
// Copy the line of code into an std::string for ease of manipulation.
std::string SourceLine(LineStart, LineEnd);
// Create a line for the caret that is filled with spaces that is the same
// length as the line of source code.
std::string CaretLine(LineEnd-LineStart, ' ');
// Highlight all of the characters covered by Ranges with ~ characters.
if (NumRanges) {
unsigned LineNo = SM.getLineNumber(FID, FileOffset);
for (unsigned i = 0, e = NumRanges; i != e; ++i)
HighlightRange(Ranges[i], SM, LineNo, FID, CaretLine, SourceLine);
}
// Next, insert the caret itself.
if (ColNo-1 < CaretLine.size())
CaretLine[ColNo-1] = '^';
else
CaretLine.push_back('^');
// Scan the source line, looking for tabs. If we find any, manually expand
// them to 8 characters and update the CaretLine to match.
for (unsigned i = 0; i != SourceLine.size(); ++i) {
if (SourceLine[i] != '\t') continue;
// Replace this tab with at least one space.
SourceLine[i] = ' ';
// Compute the number of spaces we need to insert.
unsigned NumSpaces = ((i+8)&~7) - (i+1);
assert(NumSpaces < 8 && "Invalid computation of space amt");
// Insert spaces into the SourceLine.
SourceLine.insert(i+1, NumSpaces, ' ');
// Insert spaces or ~'s into CaretLine.
CaretLine.insert(i+1, NumSpaces, CaretLine[i] == '~' ? '~' : ' ');
}
// If we are in -fdiagnostics-print-source-range-info mode, we are trying to
// produce easily machine parsable output. Add a space before the source line
// and the caret to make it trivial to tell the main diagnostic line from what
// the user is intended to see.
if (PrintRangeInfo) {
SourceLine = ' ' + SourceLine;
CaretLine = ' ' + CaretLine;
}
std::string FixItInsertionLine;
if (NumHints && PrintFixItInfo) {
for (const CodeModificationHint *Hint = Hints, *LastHint = Hints + NumHints;
Hint != LastHint; ++Hint) {
if (Hint->InsertionLoc.isValid()) {
// We have an insertion hint. Determine whether the inserted
// code is on the same line as the caret.
std::pair<FileID, unsigned> HintLocInfo
= SM.getDecomposedInstantiationLoc(Hint->InsertionLoc);
if (SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) ==
SM.getLineNumber(FID, FileOffset)) {
// Insert the new code into the line just below the code
// that the user wrote.
unsigned HintColNo
= SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second);
unsigned LastColumnModified
= HintColNo - 1 + Hint->CodeToInsert.size();
if (LastColumnModified > FixItInsertionLine.size())
FixItInsertionLine.resize(LastColumnModified, ' ');
std::copy(Hint->CodeToInsert.begin(), Hint->CodeToInsert.end(),
FixItInsertionLine.begin() + HintColNo - 1);
} else {
FixItInsertionLine.clear();
break;
}
}
}
}
// If the source line is too long for our terminal, select only the
// "interesting" source region within that line.
if (Columns && SourceLine.size() > Columns)
SelectInterestingSourceRegion(SourceLine, CaretLine, FixItInsertionLine,
CaretEndColNo, Columns);
// Finally, remove any blank spaces from the end of CaretLine.
while (CaretLine[CaretLine.size()-1] == ' ')
CaretLine.erase(CaretLine.end()-1);
// Emit what we have computed.
OS << SourceLine << '\n';
if (UseColors)
OS.changeColor(caretColor, true);
OS << CaretLine << '\n';
if (UseColors)
OS.resetColor();
if (!FixItInsertionLine.empty()) {
if (UseColors)
// Print fixit line in color
OS.changeColor(fixitColor, false);
if (PrintRangeInfo)
OS << ' ';
OS << FixItInsertionLine << '\n';
if (UseColors)
OS.resetColor();
}
}
