1 //===--- TextDiagnostic.cpp - Text Diagnostic Pretty-Printing -------------===//
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 #include "clang/Frontend/TextDiagnostic.h"
11 #include "clang/Basic/CharInfo.h"
12 #include "clang/Basic/DiagnosticOptions.h"
13 #include "clang/Basic/FileManager.h"
14 #include "clang/Basic/SourceManager.h"
15 #include "clang/Lex/Lexer.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/ADT/StringExtras.h"
18 #include "llvm/Support/ConvertUTF.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include "llvm/Support/Locale.h"
21 #include "llvm/Support/MemoryBuffer.h"
22 #include "llvm/Support/raw_ostream.h"
25 using namespace clang;
27 static const enum raw_ostream::Colors noteColor =
29 static const enum raw_ostream::Colors fixitColor =
31 static const enum raw_ostream::Colors caretColor =
33 static const enum raw_ostream::Colors warningColor =
35 static const enum raw_ostream::Colors templateColor =
37 static const enum raw_ostream::Colors errorColor = raw_ostream::RED;
38 static const enum raw_ostream::Colors fatalColor = raw_ostream::RED;
39 // Used for changing only the bold attribute.
40 static const enum raw_ostream::Colors savedColor =
41 raw_ostream::SAVEDCOLOR;
43 /// \brief Add highlights to differences in template strings.
44 static void applyTemplateHighlighting(raw_ostream &OS, StringRef Str,
45 bool &Normal, bool Bold) {
47 size_t Pos = Str.find(ToggleHighlight);
48 OS << Str.slice(0, Pos);
49 if (Pos == StringRef::npos)
52 Str = Str.substr(Pos + 1);
54 OS.changeColor(templateColor, true);
58 OS.changeColor(savedColor, true);
64 /// \brief Number of spaces to indent when word-wrapping.
65 const unsigned WordWrapIndentation = 6;
67 static int bytesSincePreviousTabOrLineBegin(StringRef SourceLine, size_t i) {
70 if (SourceLine[--i]=='\t')
77 /// \brief returns a printable representation of first item from input range
79 /// This function returns a printable representation of the next item in a line
80 /// of source. If the next byte begins a valid and printable character, that
81 /// character is returned along with 'true'.
83 /// Otherwise, if the next byte begins a valid, but unprintable character, a
84 /// printable, escaped representation of the character is returned, along with
85 /// 'false'. Otherwise a printable, escaped representation of the next byte
86 /// is returned along with 'false'.
88 /// \note The index is updated to be used with a subsequent call to
89 /// printableTextForNextCharacter.
91 /// \param SourceLine The line of source
92 /// \param i Pointer to byte index,
93 /// \param TabStop used to expand tabs
94 /// \return pair(printable text, 'true' iff original text was printable)
96 static std::pair<SmallString<16>, bool>
97 printableTextForNextCharacter(StringRef SourceLine, size_t *i,
99 assert(i && "i must not be null");
100 assert(*i<SourceLine.size() && "must point to a valid index");
102 if (SourceLine[*i]=='\t') {
103 assert(0 < TabStop && TabStop <= DiagnosticOptions::MaxTabStop &&
104 "Invalid -ftabstop value");
105 unsigned col = bytesSincePreviousTabOrLineBegin(SourceLine, *i);
106 unsigned NumSpaces = TabStop - col%TabStop;
107 assert(0 < NumSpaces && NumSpaces <= TabStop
108 && "Invalid computation of space amt");
111 SmallString<16> expandedTab;
112 expandedTab.assign(NumSpaces, ' ');
113 return std::make_pair(expandedTab, true);
116 unsigned char const *begin, *end;
117 begin = reinterpret_cast<unsigned char const *>(&*(SourceLine.begin() + *i));
118 end = begin + (SourceLine.size() - *i);
120 if (isLegalUTF8Sequence(begin, end)) {
123 unsigned char const *original_begin = begin;
124 unsigned char const *cp_end = begin+getNumBytesForUTF8(SourceLine[*i]);
126 ConversionResult res = ConvertUTF8toUTF32(&begin, cp_end, &cptr, cptr+1,
129 assert(conversionOK==res);
130 assert(0 < begin-original_begin
131 && "we must be further along in the string now");
132 *i += begin-original_begin;
134 if (!llvm::sys::locale::isPrint(c)) {
135 // If next character is valid UTF-8, but not printable
136 SmallString<16> expandedCP("<U+>");
138 expandedCP.insert(expandedCP.begin()+3, llvm::hexdigit(c%16));
141 while (expandedCP.size() < 8)
142 expandedCP.insert(expandedCP.begin()+3, llvm::hexdigit(0));
143 return std::make_pair(expandedCP, false);
146 // If next character is valid UTF-8, and printable
147 return std::make_pair(SmallString<16>(original_begin, cp_end), true);
151 // If next byte is not valid UTF-8 (and therefore not printable)
152 SmallString<16> expandedByte("<XX>");
153 unsigned char byte = SourceLine[*i];
154 expandedByte[1] = llvm::hexdigit(byte / 16);
155 expandedByte[2] = llvm::hexdigit(byte % 16);
157 return std::make_pair(expandedByte, false);
160 static void expandTabs(std::string &SourceLine, unsigned TabStop) {
161 size_t i = SourceLine.size();
164 if (SourceLine[i]!='\t')
167 std::pair<SmallString<16>,bool> res
168 = printableTextForNextCharacter(SourceLine, &tmp_i, TabStop);
169 SourceLine.replace(i, 1, res.first.c_str());
173 /// This function takes a raw source line and produces a mapping from the bytes
174 /// of the printable representation of the line to the columns those printable
175 /// characters will appear at (numbering the first column as 0).
177 /// If a byte 'i' corresponds to muliple columns (e.g. the byte contains a tab
178 /// character) then the array will map that byte to the first column the
179 /// tab appears at and the next value in the map will have been incremented
182 /// If a byte is the first in a sequence of bytes that together map to a single
183 /// entity in the output, then the array will map that byte to the appropriate
184 /// column while the subsequent bytes will be -1.
186 /// The last element in the array does not correspond to any byte in the input
187 /// and instead is the number of columns needed to display the source
189 /// example: (given a tabstop of 8)
191 /// "a \t \u3042" -> {0,1,2,8,9,-1,-1,11}
193 /// (\\u3042 is represented in UTF-8 by three bytes and takes two columns to
195 static void byteToColumn(StringRef SourceLine, unsigned TabStop,
196 SmallVectorImpl<int> &out) {
199 if (SourceLine.empty()) {
204 out.resize(SourceLine.size()+1, -1);
208 while (i<SourceLine.size()) {
210 std::pair<SmallString<16>,bool> res
211 = printableTextForNextCharacter(SourceLine, &i, TabStop);
212 columns += llvm::sys::locale::columnWidth(res.first);
214 out.back() = columns;
217 /// This function takes a raw source line and produces a mapping from columns
218 /// to the byte of the source line that produced the character displaying at
219 /// that column. This is the inverse of the mapping produced by byteToColumn()
221 /// The last element in the array is the number of bytes in the source string
223 /// example: (given a tabstop of 8)
225 /// "a \t \u3042" -> {0,1,2,-1,-1,-1,-1,-1,3,4,-1,7}
227 /// (\\u3042 is represented in UTF-8 by three bytes and takes two columns to
229 static void columnToByte(StringRef SourceLine, unsigned TabStop,
230 SmallVectorImpl<int> &out) {
233 if (SourceLine.empty()) {
240 while (i<SourceLine.size()) {
241 out.resize(columns+1, -1);
243 std::pair<SmallString<16>,bool> res
244 = printableTextForNextCharacter(SourceLine, &i, TabStop);
245 columns += llvm::sys::locale::columnWidth(res.first);
247 out.resize(columns+1, -1);
252 struct SourceColumnMap {
253 SourceColumnMap(StringRef SourceLine, unsigned TabStop)
254 : m_SourceLine(SourceLine) {
256 ::byteToColumn(SourceLine, TabStop, m_byteToColumn);
257 ::columnToByte(SourceLine, TabStop, m_columnToByte);
259 assert(m_byteToColumn.size()==SourceLine.size()+1);
260 assert(0 < m_byteToColumn.size() && 0 < m_columnToByte.size());
261 assert(m_byteToColumn.size()
262 == static_cast<unsigned>(m_columnToByte.back()+1));
263 assert(static_cast<unsigned>(m_byteToColumn.back()+1)
264 == m_columnToByte.size());
266 int columns() const { return m_byteToColumn.back(); }
267 int bytes() const { return m_columnToByte.back(); }
269 /// \brief Map a byte to the column which it is at the start of, or return -1
270 /// if it is not at the start of a column (for a UTF-8 trailing byte).
271 int byteToColumn(int n) const {
272 assert(0<=n && n<static_cast<int>(m_byteToColumn.size()));
273 return m_byteToColumn[n];
276 /// \brief Map a byte to the first column which contains it.
277 int byteToContainingColumn(int N) const {
278 assert(0 <= N && N < static_cast<int>(m_byteToColumn.size()));
279 while (m_byteToColumn[N] == -1)
281 return m_byteToColumn[N];
284 /// \brief Map a column to the byte which starts the column, or return -1 if
285 /// the column the second or subsequent column of an expanded tab or similar
286 /// multi-column entity.
287 int columnToByte(int n) const {
288 assert(0<=n && n<static_cast<int>(m_columnToByte.size()));
289 return m_columnToByte[n];
292 /// \brief Map from a byte index to the next byte which starts a column.
293 int startOfNextColumn(int N) const {
294 assert(0 <= N && N < static_cast<int>(m_columnToByte.size() - 1));
295 while (byteToColumn(++N) == -1) {}
299 /// \brief Map from a byte index to the previous byte which starts a column.
300 int startOfPreviousColumn(int N) const {
301 assert(0 < N && N < static_cast<int>(m_columnToByte.size()));
302 while (byteToColumn(--N) == -1) {}
306 StringRef getSourceLine() const {
311 const std::string m_SourceLine;
312 SmallVector<int,200> m_byteToColumn;
313 SmallVector<int,200> m_columnToByte;
316 // used in assert in selectInterestingSourceRegion()
317 struct char_out_of_range {
318 const char lower,upper;
319 char_out_of_range(char lower, char upper) :
320 lower(lower), upper(upper) {}
321 bool operator()(char c) { return c < lower || upper < c; }
323 } // end anonymous namespace
325 /// \brief When the source code line we want to print is too long for
326 /// the terminal, select the "interesting" region.
327 static void selectInterestingSourceRegion(std::string &SourceLine,
328 std::string &CaretLine,
329 std::string &FixItInsertionLine,
331 const SourceColumnMap &map) {
332 unsigned MaxColumns = std::max<unsigned>(map.columns(),
333 std::max(CaretLine.size(),
334 FixItInsertionLine.size()));
335 // if the number of columns is less than the desired number we're done
336 if (MaxColumns <= Columns)
339 // no special characters allowed in CaretLine or FixItInsertionLine
340 assert(CaretLine.end() ==
341 std::find_if(CaretLine.begin(), CaretLine.end(),
342 char_out_of_range(' ','~')));
343 assert(FixItInsertionLine.end() ==
344 std::find_if(FixItInsertionLine.begin(), FixItInsertionLine.end(),
345 char_out_of_range(' ','~')));
347 // Find the slice that we need to display the full caret line
349 unsigned CaretStart = 0, CaretEnd = CaretLine.size();
350 for (; CaretStart != CaretEnd; ++CaretStart)
351 if (!isWhitespace(CaretLine[CaretStart]))
354 for (; CaretEnd != CaretStart; --CaretEnd)
355 if (!isWhitespace(CaretLine[CaretEnd - 1]))
358 // caret has already been inserted into CaretLine so the above whitespace
359 // check is guaranteed to include the caret
361 // If we have a fix-it line, make sure the slice includes all of the
362 // fix-it information.
363 if (!FixItInsertionLine.empty()) {
364 unsigned FixItStart = 0, FixItEnd = FixItInsertionLine.size();
365 for (; FixItStart != FixItEnd; ++FixItStart)
366 if (!isWhitespace(FixItInsertionLine[FixItStart]))
369 for (; FixItEnd != FixItStart; --FixItEnd)
370 if (!isWhitespace(FixItInsertionLine[FixItEnd - 1]))
373 CaretStart = std::min(FixItStart, CaretStart);
374 CaretEnd = std::max(FixItEnd, CaretEnd);
377 // CaretEnd may have been set at the middle of a character
378 // If it's not at a character's first column then advance it past the current
380 while (static_cast<int>(CaretEnd) < map.columns() &&
381 -1 == map.columnToByte(CaretEnd))
384 assert((static_cast<int>(CaretStart) > map.columns() ||
385 -1!=map.columnToByte(CaretStart)) &&
386 "CaretStart must not point to a column in the middle of a source"
388 assert((static_cast<int>(CaretEnd) > map.columns() ||
389 -1!=map.columnToByte(CaretEnd)) &&
390 "CaretEnd must not point to a column in the middle of a source line"
393 // CaretLine[CaretStart, CaretEnd) contains all of the interesting
394 // parts of the caret line. While this slice is smaller than the
395 // number of columns we have, try to grow the slice to encompass
398 unsigned SourceStart = map.columnToByte(std::min<unsigned>(CaretStart,
400 unsigned SourceEnd = map.columnToByte(std::min<unsigned>(CaretEnd,
403 unsigned CaretColumnsOutsideSource = CaretEnd-CaretStart
404 - (map.byteToColumn(SourceEnd)-map.byteToColumn(SourceStart));
406 char const *front_ellipse = " ...";
407 char const *front_space = " ";
408 char const *back_ellipse = "...";
409 unsigned ellipses_space = strlen(front_ellipse) + strlen(back_ellipse);
411 unsigned TargetColumns = Columns;
412 // Give us extra room for the ellipses
413 // and any of the caret line that extends past the source
414 if (TargetColumns > ellipses_space+CaretColumnsOutsideSource)
415 TargetColumns -= ellipses_space+CaretColumnsOutsideSource;
417 while (SourceStart>0 || SourceEnd<SourceLine.size()) {
418 bool ExpandedRegion = false;
421 unsigned NewStart = map.startOfPreviousColumn(SourceStart);
423 // Skip over any whitespace we see here; we're looking for
424 // another bit of interesting text.
425 // FIXME: Detect non-ASCII whitespace characters too.
426 while (NewStart && isWhitespace(SourceLine[NewStart]))
427 NewStart = map.startOfPreviousColumn(NewStart);
429 // Skip over this bit of "interesting" text.
431 unsigned Prev = map.startOfPreviousColumn(NewStart);
432 if (isWhitespace(SourceLine[Prev]))
437 assert(map.byteToColumn(NewStart) != -1);
438 unsigned NewColumns = map.byteToColumn(SourceEnd) -
439 map.byteToColumn(NewStart);
440 if (NewColumns <= TargetColumns) {
441 SourceStart = NewStart;
442 ExpandedRegion = true;
446 if (SourceEnd<SourceLine.size()) {
447 unsigned NewEnd = map.startOfNextColumn(SourceEnd);
449 // Skip over any whitespace we see here; we're looking for
450 // another bit of interesting text.
451 // FIXME: Detect non-ASCII whitespace characters too.
452 while (NewEnd < SourceLine.size() && isWhitespace(SourceLine[NewEnd]))
453 NewEnd = map.startOfNextColumn(NewEnd);
455 // Skip over this bit of "interesting" text.
456 while (NewEnd < SourceLine.size() && isWhitespace(SourceLine[NewEnd]))
457 NewEnd = map.startOfNextColumn(NewEnd);
459 assert(map.byteToColumn(NewEnd) != -1);
460 unsigned NewColumns = map.byteToColumn(NewEnd) -
461 map.byteToColumn(SourceStart);
462 if (NewColumns <= TargetColumns) {
464 ExpandedRegion = true;
472 CaretStart = map.byteToColumn(SourceStart);
473 CaretEnd = map.byteToColumn(SourceEnd) + CaretColumnsOutsideSource;
475 // [CaretStart, CaretEnd) is the slice we want. Update the various
476 // output lines to show only this slice, with two-space padding
477 // before the lines so that it looks nicer.
479 assert(CaretStart!=(unsigned)-1 && CaretEnd!=(unsigned)-1 &&
480 SourceStart!=(unsigned)-1 && SourceEnd!=(unsigned)-1);
481 assert(SourceStart <= SourceEnd);
482 assert(CaretStart <= CaretEnd);
484 unsigned BackColumnsRemoved
485 = map.byteToColumn(SourceLine.size())-map.byteToColumn(SourceEnd);
486 unsigned FrontColumnsRemoved = CaretStart;
487 unsigned ColumnsKept = CaretEnd-CaretStart;
489 // We checked up front that the line needed truncation
490 assert(FrontColumnsRemoved+ColumnsKept+BackColumnsRemoved > Columns);
492 // The line needs some trunctiona, and we'd prefer to keep the front
493 // if possible, so remove the back
494 if (BackColumnsRemoved > strlen(back_ellipse))
495 SourceLine.replace(SourceEnd, std::string::npos, back_ellipse);
497 // If that's enough then we're done
498 if (FrontColumnsRemoved+ColumnsKept <= Columns)
501 // Otherwise remove the front as well
502 if (FrontColumnsRemoved > strlen(front_ellipse)) {
503 SourceLine.replace(0, SourceStart, front_ellipse);
504 CaretLine.replace(0, CaretStart, front_space);
505 if (!FixItInsertionLine.empty())
506 FixItInsertionLine.replace(0, CaretStart, front_space);
510 /// \brief Skip over whitespace in the string, starting at the given
513 /// \returns The index of the first non-whitespace character that is
514 /// greater than or equal to Idx or, if no such character exists,
515 /// returns the end of the string.
516 static unsigned skipWhitespace(unsigned Idx, StringRef Str, unsigned Length) {
517 while (Idx < Length && isWhitespace(Str[Idx]))
522 /// \brief If the given character is the start of some kind of
523 /// balanced punctuation (e.g., quotes or parentheses), return the
524 /// character that will terminate the punctuation.
526 /// \returns The ending punctuation character, if any, or the NULL
527 /// character if the input character does not start any punctuation.
528 static inline char findMatchingPunctuation(char c) {
530 case '\'': return '\'';
531 case '`': return '\'';
532 case '"': return '"';
533 case '(': return ')';
534 case '[': return ']';
535 case '{': return '}';
542 /// \brief Find the end of the word starting at the given offset
545 /// \returns the index pointing one character past the end of the
547 static unsigned findEndOfWord(unsigned Start, StringRef Str,
548 unsigned Length, unsigned Column,
550 assert(Start < Str.size() && "Invalid start position!");
551 unsigned End = Start + 1;
553 // If we are already at the end of the string, take that as the word.
554 if (End == Str.size())
557 // Determine if the start of the string is actually opening
558 // punctuation, e.g., a quote or parentheses.
559 char EndPunct = findMatchingPunctuation(Str[Start]);
561 // This is a normal word. Just find the first space character.
562 while (End < Length && !isWhitespace(Str[End]))
567 // We have the start of a balanced punctuation sequence (quotes,
568 // parentheses, etc.). Determine the full sequence is.
569 SmallString<16> PunctuationEndStack;
570 PunctuationEndStack.push_back(EndPunct);
571 while (End < Length && !PunctuationEndStack.empty()) {
572 if (Str[End] == PunctuationEndStack.back())
573 PunctuationEndStack.pop_back();
574 else if (char SubEndPunct = findMatchingPunctuation(Str[End]))
575 PunctuationEndStack.push_back(SubEndPunct);
580 // Find the first space character after the punctuation ended.
581 while (End < Length && !isWhitespace(Str[End]))
584 unsigned PunctWordLength = End - Start;
585 if (// If the word fits on this line
586 Column + PunctWordLength <= Columns ||
587 // ... or the word is "short enough" to take up the next line
588 // without too much ugly white space
589 PunctWordLength < Columns/3)
590 return End; // Take the whole thing as a single "word".
592 // The whole quoted/parenthesized string is too long to print as a
593 // single "word". Instead, find the "word" that starts just after
594 // the punctuation and use that end-point instead. This will recurse
595 // until it finds something small enough to consider a word.
596 return findEndOfWord(Start + 1, Str, Length, Column + 1, Columns);
599 /// \brief Print the given string to a stream, word-wrapping it to
600 /// some number of columns in the process.
602 /// \param OS the stream to which the word-wrapping string will be
604 /// \param Str the string to word-wrap and output.
605 /// \param Columns the number of columns to word-wrap to.
606 /// \param Column the column number at which the first character of \p
607 /// Str will be printed. This will be non-zero when part of the first
608 /// line has already been printed.
609 /// \param Bold if the current text should be bold
610 /// \param Indentation the number of spaces to indent any lines beyond
612 /// \returns true if word-wrapping was required, or false if the
613 /// string fit on the first line.
614 static bool printWordWrapped(raw_ostream &OS, StringRef Str,
618 unsigned Indentation = WordWrapIndentation) {
619 const unsigned Length = std::min(Str.find('\n'), Str.size());
620 bool TextNormal = true;
622 // The string used to indent each line.
623 SmallString<16> IndentStr;
624 IndentStr.assign(Indentation, ' ');
625 bool Wrapped = false;
626 for (unsigned WordStart = 0, WordEnd; WordStart < Length;
627 WordStart = WordEnd) {
628 // Find the beginning of the next word.
629 WordStart = skipWhitespace(WordStart, Str, Length);
630 if (WordStart == Length)
633 // Find the end of this word.
634 WordEnd = findEndOfWord(WordStart, Str, Length, Column, Columns);
636 // Does this word fit on the current line?
637 unsigned WordLength = WordEnd - WordStart;
638 if (Column + WordLength < Columns) {
639 // This word fits on the current line; print it there.
644 applyTemplateHighlighting(OS, Str.substr(WordStart, WordLength),
646 Column += WordLength;
650 // This word does not fit on the current line, so wrap to the next
653 OS.write(&IndentStr[0], Indentation);
654 applyTemplateHighlighting(OS, Str.substr(WordStart, WordLength),
656 Column = Indentation + WordLength;
660 // Append any remaning text from the message with its existing formatting.
661 applyTemplateHighlighting(OS, Str.substr(Length), TextNormal, Bold);
663 assert(TextNormal && "Text highlighted at end of diagnostic message.");
668 TextDiagnostic::TextDiagnostic(raw_ostream &OS,
669 const LangOptions &LangOpts,
670 DiagnosticOptions *DiagOpts)
671 : DiagnosticRenderer(LangOpts, DiagOpts), OS(OS) {}
673 TextDiagnostic::~TextDiagnostic() {}
676 TextDiagnostic::emitDiagnosticMessage(SourceLocation Loc,
678 DiagnosticsEngine::Level Level,
680 ArrayRef<clang::CharSourceRange> Ranges,
681 const SourceManager *SM,
682 DiagOrStoredDiag D) {
683 uint64_t StartOfLocationInfo = OS.tell();
685 // Emit the location of this particular diagnostic.
687 emitDiagnosticLoc(Loc, PLoc, Level, Ranges, *SM);
689 if (DiagOpts->ShowColors)
692 printDiagnosticLevel(OS, Level, DiagOpts->ShowColors);
693 printDiagnosticMessage(OS, Level, Message,
694 OS.tell() - StartOfLocationInfo,
695 DiagOpts->MessageLength, DiagOpts->ShowColors);
699 TextDiagnostic::printDiagnosticLevel(raw_ostream &OS,
700 DiagnosticsEngine::Level Level,
703 // Print diagnostic category in bold and color
705 case DiagnosticsEngine::Ignored:
706 llvm_unreachable("Invalid diagnostic type");
707 case DiagnosticsEngine::Note: OS.changeColor(noteColor, true); break;
708 case DiagnosticsEngine::Warning: OS.changeColor(warningColor, true); break;
709 case DiagnosticsEngine::Error: OS.changeColor(errorColor, true); break;
710 case DiagnosticsEngine::Fatal: OS.changeColor(fatalColor, true); break;
715 case DiagnosticsEngine::Ignored:
716 llvm_unreachable("Invalid diagnostic type");
717 case DiagnosticsEngine::Note: OS << "note: "; break;
718 case DiagnosticsEngine::Warning: OS << "warning: "; break;
719 case DiagnosticsEngine::Error: OS << "error: "; break;
720 case DiagnosticsEngine::Fatal: OS << "fatal error: "; break;
728 TextDiagnostic::printDiagnosticMessage(raw_ostream &OS,
729 DiagnosticsEngine::Level Level,
731 unsigned CurrentColumn, unsigned Columns,
735 // Print warnings, errors and fatal errors in bold, no color
737 case DiagnosticsEngine::Warning:
738 case DiagnosticsEngine::Error:
739 case DiagnosticsEngine::Fatal:
740 OS.changeColor(savedColor, true);
743 default: break; //don't bold notes
748 printWordWrapped(OS, Message, Columns, CurrentColumn, Bold);
751 applyTemplateHighlighting(OS, Message, Normal, Bold);
752 assert(Normal && "Formatting should have returned to normal");
760 /// \brief Print out the file/line/column information and include trace.
762 /// This method handlen the emission of the diagnostic location information.
763 /// This includes extracting as much location information as is present for
764 /// the diagnostic and printing it, as well as any include stack or source
765 /// ranges necessary.
766 void TextDiagnostic::emitDiagnosticLoc(SourceLocation Loc, PresumedLoc PLoc,
767 DiagnosticsEngine::Level Level,
768 ArrayRef<CharSourceRange> Ranges,
769 const SourceManager &SM) {
770 if (PLoc.isInvalid()) {
771 // At least print the file name if available:
772 FileID FID = SM.getFileID(Loc);
773 if (!FID.isInvalid()) {
774 const FileEntry* FE = SM.getFileEntryForID(FID);
775 if (FE && FE->getName()) {
777 if (FE->getDevice() == 0 && FE->getInode() == 0
778 && FE->getFileMode() == 0) {
779 // in PCH is a guess, but a good one:
787 unsigned LineNo = PLoc.getLine();
789 if (!DiagOpts->ShowLocation)
792 if (DiagOpts->ShowColors)
793 OS.changeColor(savedColor, true);
795 OS << PLoc.getFilename();
796 switch (DiagOpts->getFormat()) {
797 case DiagnosticOptions::Clang: OS << ':' << LineNo; break;
798 case DiagnosticOptions::Msvc: OS << '(' << LineNo; break;
799 case DiagnosticOptions::Vi: OS << " +" << LineNo; break;
802 if (DiagOpts->ShowColumn)
803 // Compute the column number.
804 if (unsigned ColNo = PLoc.getColumn()) {
805 if (DiagOpts->getFormat() == DiagnosticOptions::Msvc) {
812 switch (DiagOpts->getFormat()) {
813 case DiagnosticOptions::Clang:
814 case DiagnosticOptions::Vi: OS << ':'; break;
815 case DiagnosticOptions::Msvc: OS << ") : "; break;
818 if (DiagOpts->ShowSourceRanges && !Ranges.empty()) {
820 SM.getFileID(SM.getExpansionLoc(Loc));
821 bool PrintedRange = false;
823 for (ArrayRef<CharSourceRange>::const_iterator RI = Ranges.begin(),
826 // Ignore invalid ranges.
827 if (!RI->isValid()) continue;
829 SourceLocation B = SM.getExpansionLoc(RI->getBegin());
830 SourceLocation E = SM.getExpansionLoc(RI->getEnd());
832 // If the End location and the start location are the same and are a
833 // macro location, then the range was something that came from a
834 // macro expansion or _Pragma. If this is an object-like macro, the
835 // best we can do is to highlight the range. If this is a
836 // function-like macro, we'd also like to highlight the arguments.
837 if (B == E && RI->getEnd().isMacroID())
838 E = SM.getExpansionRange(RI->getEnd()).second;
840 std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(B);
841 std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(E);
843 // If the start or end of the range is in another file, just discard
845 if (BInfo.first != CaretFileID || EInfo.first != CaretFileID)
848 // Add in the length of the token, so that we cover multi-char
850 unsigned TokSize = 0;
851 if (RI->isTokenRange())
852 TokSize = Lexer::MeasureTokenLength(E, SM, LangOpts);
854 OS << '{' << SM.getLineNumber(BInfo.first, BInfo.second) << ':'
855 << SM.getColumnNumber(BInfo.first, BInfo.second) << '-'
856 << SM.getLineNumber(EInfo.first, EInfo.second) << ':'
857 << (SM.getColumnNumber(EInfo.first, EInfo.second)+TokSize)
868 void TextDiagnostic::emitBasicNote(StringRef Message) {
869 // FIXME: Emit this as a real note diagnostic.
870 // FIXME: Format an actual diagnostic rather than a hard coded string.
871 OS << "note: " << Message << "\n";
874 void TextDiagnostic::emitIncludeLocation(SourceLocation Loc,
876 const SourceManager &SM) {
877 if (DiagOpts->ShowLocation)
878 OS << "In file included from " << PLoc.getFilename() << ':'
879 << PLoc.getLine() << ":\n";
881 OS << "In included file:\n";
884 void TextDiagnostic::emitImportLocation(SourceLocation Loc, PresumedLoc PLoc,
885 StringRef ModuleName,
886 const SourceManager &SM) {
887 if (DiagOpts->ShowLocation)
888 OS << "In module '" << ModuleName << "' imported from "
889 << PLoc.getFilename() << ':' << PLoc.getLine() << ":\n";
891 OS << "In module " << ModuleName << "':\n";
894 void TextDiagnostic::emitBuildingModuleLocation(SourceLocation Loc,
896 StringRef ModuleName,
897 const SourceManager &SM) {
898 if (DiagOpts->ShowLocation && PLoc.getFilename())
899 OS << "While building module '" << ModuleName << "' imported from "
900 << PLoc.getFilename() << ':' << PLoc.getLine() << ":\n";
902 OS << "While building module '" << ModuleName << "':\n";
905 /// \brief Highlight a SourceRange (with ~'s) for any characters on LineNo.
906 static void highlightRange(const CharSourceRange &R,
907 unsigned LineNo, FileID FID,
908 const SourceColumnMap &map,
909 std::string &CaretLine,
910 const SourceManager &SM,
911 const LangOptions &LangOpts) {
912 if (!R.isValid()) return;
914 SourceLocation Begin = R.getBegin();
915 SourceLocation End = R.getEnd();
917 unsigned StartLineNo = SM.getExpansionLineNumber(Begin);
918 if (StartLineNo > LineNo || SM.getFileID(Begin) != FID)
919 return; // No intersection.
921 unsigned EndLineNo = SM.getExpansionLineNumber(End);
922 if (EndLineNo < LineNo || SM.getFileID(End) != FID)
923 return; // No intersection.
925 // Compute the column number of the start.
926 unsigned StartColNo = 0;
927 if (StartLineNo == LineNo) {
928 StartColNo = SM.getExpansionColumnNumber(Begin);
929 if (StartColNo) --StartColNo; // Zero base the col #.
932 // Compute the column number of the end.
933 unsigned EndColNo = map.getSourceLine().size();
934 if (EndLineNo == LineNo) {
935 EndColNo = SM.getExpansionColumnNumber(End);
937 --EndColNo; // Zero base the col #.
939 // Add in the length of the token, so that we cover multi-char tokens if
940 // this is a token range.
941 if (R.isTokenRange())
942 EndColNo += Lexer::MeasureTokenLength(End, SM, LangOpts);
944 EndColNo = CaretLine.size();
948 assert(StartColNo <= EndColNo && "Invalid range!");
950 // Check that a token range does not highlight only whitespace.
951 if (R.isTokenRange()) {
952 // Pick the first non-whitespace column.
953 while (StartColNo < map.getSourceLine().size() &&
954 (map.getSourceLine()[StartColNo] == ' ' ||
955 map.getSourceLine()[StartColNo] == '\t'))
956 StartColNo = map.startOfNextColumn(StartColNo);
958 // Pick the last non-whitespace column.
959 if (EndColNo > map.getSourceLine().size())
960 EndColNo = map.getSourceLine().size();
962 (map.getSourceLine()[EndColNo-1] == ' ' ||
963 map.getSourceLine()[EndColNo-1] == '\t'))
964 EndColNo = map.startOfPreviousColumn(EndColNo);
966 // If the start/end passed each other, then we are trying to highlight a
967 // range that just exists in whitespace, which must be some sort of other
969 assert(StartColNo <= EndColNo && "Trying to highlight whitespace??");
972 assert(StartColNo <= map.getSourceLine().size() && "Invalid range!");
973 assert(EndColNo <= map.getSourceLine().size() && "Invalid range!");
975 // Fill the range with ~'s.
976 StartColNo = map.byteToContainingColumn(StartColNo);
977 EndColNo = map.byteToContainingColumn(EndColNo);
979 assert(StartColNo <= EndColNo && "Invalid range!");
980 if (CaretLine.size() < EndColNo)
981 CaretLine.resize(EndColNo,' ');
982 std::fill(CaretLine.begin()+StartColNo,CaretLine.begin()+EndColNo,'~');
985 static std::string buildFixItInsertionLine(unsigned LineNo,
986 const SourceColumnMap &map,
987 ArrayRef<FixItHint> Hints,
988 const SourceManager &SM,
989 const DiagnosticOptions *DiagOpts) {
990 std::string FixItInsertionLine;
991 if (Hints.empty() || !DiagOpts->ShowFixits)
992 return FixItInsertionLine;
993 unsigned PrevHintEndCol = 0;
995 for (ArrayRef<FixItHint>::iterator I = Hints.begin(), E = Hints.end();
997 if (!I->CodeToInsert.empty()) {
998 // We have an insertion hint. Determine whether the inserted
999 // code contains no newlines and is on the same line as the caret.
1000 std::pair<FileID, unsigned> HintLocInfo
1001 = SM.getDecomposedExpansionLoc(I->RemoveRange.getBegin());
1002 if (LineNo == SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) &&
1003 StringRef(I->CodeToInsert).find_first_of("\n\r") == StringRef::npos) {
1004 // Insert the new code into the line just below the code
1005 // that the user wrote.
1006 // Note: When modifying this function, be very careful about what is a
1007 // "column" (printed width, platform-dependent) and what is a
1008 // "byte offset" (SourceManager "column").
1009 unsigned HintByteOffset
1010 = SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second) - 1;
1012 // The hint must start inside the source or right at the end
1013 assert(HintByteOffset < static_cast<unsigned>(map.bytes())+1);
1014 unsigned HintCol = map.byteToContainingColumn(HintByteOffset);
1016 // If we inserted a long previous hint, push this one forwards, and add
1017 // an extra space to show that this is not part of the previous
1018 // completion. This is sort of the best we can do when two hints appear
1021 // Note that if this hint is located immediately after the previous
1022 // hint, no space will be added, since the location is more important.
1023 if (HintCol < PrevHintEndCol)
1024 HintCol = PrevHintEndCol + 1;
1026 // FIXME: This function handles multibyte characters in the source, but
1027 // not in the fixits. This assertion is intended to catch unintended
1028 // use of multibyte characters in fixits. If we decide to do this, we'll
1029 // have to track separate byte widths for the source and fixit lines.
1030 assert((size_t)llvm::sys::locale::columnWidth(I->CodeToInsert) ==
1031 I->CodeToInsert.size());
1033 // This relies on one byte per column in our fixit hints.
1034 // This should NOT use HintByteOffset, because the source might have
1035 // Unicode characters in earlier columns.
1036 unsigned LastColumnModified = HintCol + I->CodeToInsert.size();
1037 if (LastColumnModified > FixItInsertionLine.size())
1038 FixItInsertionLine.resize(LastColumnModified, ' ');
1040 std::copy(I->CodeToInsert.begin(), I->CodeToInsert.end(),
1041 FixItInsertionLine.begin() + HintCol);
1043 PrevHintEndCol = LastColumnModified;
1045 FixItInsertionLine.clear();
1051 expandTabs(FixItInsertionLine, DiagOpts->TabStop);
1053 return FixItInsertionLine;
1056 /// \brief Emit a code snippet and caret line.
1058 /// This routine emits a single line's code snippet and caret line..
1060 /// \param Loc The location for the caret.
1061 /// \param Ranges The underlined ranges for this code snippet.
1062 /// \param Hints The FixIt hints active for this diagnostic.
1063 void TextDiagnostic::emitSnippetAndCaret(
1064 SourceLocation Loc, DiagnosticsEngine::Level Level,
1065 SmallVectorImpl<CharSourceRange>& Ranges,
1066 ArrayRef<FixItHint> Hints,
1067 const SourceManager &SM) {
1068 assert(!Loc.isInvalid() && "must have a valid source location here");
1069 assert(Loc.isFileID() && "must have a file location here");
1071 // If caret diagnostics are enabled and we have location, we want to
1072 // emit the caret. However, we only do this if the location moved
1073 // from the last diagnostic, if the last diagnostic was a note that
1074 // was part of a different warning or error diagnostic, or if the
1075 // diagnostic has ranges. We don't want to emit the same caret
1076 // multiple times if one loc has multiple diagnostics.
1077 if (!DiagOpts->ShowCarets)
1079 if (Loc == LastLoc && Ranges.empty() && Hints.empty() &&
1080 (LastLevel != DiagnosticsEngine::Note || Level == LastLevel))
1083 // Decompose the location into a FID/Offset pair.
1084 std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
1085 FileID FID = LocInfo.first;
1086 unsigned FileOffset = LocInfo.second;
1088 // Get information about the buffer it points into.
1089 bool Invalid = false;
1090 const char *BufStart = SM.getBufferData(FID, &Invalid).data();
1094 unsigned LineNo = SM.getLineNumber(FID, FileOffset);
1095 unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
1097 // Arbitrarily stop showing snippets when the line is too long.
1098 static const size_t MaxLineLengthToPrint = 4096;
1099 if (ColNo > MaxLineLengthToPrint)
1102 // Rewind from the current position to the start of the line.
1103 const char *TokPtr = BufStart+FileOffset;
1104 const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based.
1106 // Compute the line end. Scan forward from the error position to the end of
1108 const char *LineEnd = TokPtr;
1109 while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0')
1112 // Arbitrarily stop showing snippets when the line is too long.
1113 if (size_t(LineEnd - LineStart) > MaxLineLengthToPrint)
1116 // Copy the line of code into an std::string for ease of manipulation.
1117 std::string SourceLine(LineStart, LineEnd);
1119 // Create a line for the caret that is filled with spaces that is the same
1120 // length as the line of source code.
1121 std::string CaretLine(LineEnd-LineStart, ' ');
1123 const SourceColumnMap sourceColMap(SourceLine, DiagOpts->TabStop);
1125 // Highlight all of the characters covered by Ranges with ~ characters.
1126 for (SmallVectorImpl<CharSourceRange>::iterator I = Ranges.begin(),
1129 highlightRange(*I, LineNo, FID, sourceColMap, CaretLine, SM, LangOpts);
1131 // Next, insert the caret itself.
1132 ColNo = sourceColMap.byteToContainingColumn(ColNo-1);
1133 if (CaretLine.size()<ColNo+1)
1134 CaretLine.resize(ColNo+1, ' ');
1135 CaretLine[ColNo] = '^';
1137 std::string FixItInsertionLine = buildFixItInsertionLine(LineNo,
1142 // If the source line is too long for our terminal, select only the
1143 // "interesting" source region within that line.
1144 unsigned Columns = DiagOpts->MessageLength;
1146 selectInterestingSourceRegion(SourceLine, CaretLine, FixItInsertionLine,
1147 Columns, sourceColMap);
1149 // If we are in -fdiagnostics-print-source-range-info mode, we are trying
1150 // to produce easily machine parsable output. Add a space before the
1151 // source line and the caret to make it trivial to tell the main diagnostic
1152 // line from what the user is intended to see.
1153 if (DiagOpts->ShowSourceRanges) {
1154 SourceLine = ' ' + SourceLine;
1155 CaretLine = ' ' + CaretLine;
1158 // Finally, remove any blank spaces from the end of CaretLine.
1159 while (CaretLine[CaretLine.size()-1] == ' ')
1160 CaretLine.erase(CaretLine.end()-1);
1162 // Emit what we have computed.
1163 emitSnippet(SourceLine);
1165 if (DiagOpts->ShowColors)
1166 OS.changeColor(caretColor, true);
1167 OS << CaretLine << '\n';
1168 if (DiagOpts->ShowColors)
1171 if (!FixItInsertionLine.empty()) {
1172 if (DiagOpts->ShowColors)
1173 // Print fixit line in color
1174 OS.changeColor(fixitColor, false);
1175 if (DiagOpts->ShowSourceRanges)
1177 OS << FixItInsertionLine << '\n';
1178 if (DiagOpts->ShowColors)
1182 // Print out any parseable fixit information requested by the options.
1183 emitParseableFixits(Hints, SM);
1186 void TextDiagnostic::emitSnippet(StringRef line) {
1192 std::string to_print;
1193 bool print_reversed = false;
1195 while (i<line.size()) {
1196 std::pair<SmallString<16>,bool> res
1197 = printableTextForNextCharacter(line, &i, DiagOpts->TabStop);
1198 bool was_printable = res.second;
1200 if (DiagOpts->ShowColors && was_printable == print_reversed) {
1205 if (DiagOpts->ShowColors)
1209 print_reversed = !was_printable;
1210 to_print += res.first.str();
1213 if (print_reversed && DiagOpts->ShowColors)
1216 if (print_reversed && DiagOpts->ShowColors)
1222 void TextDiagnostic::emitParseableFixits(ArrayRef<FixItHint> Hints,
1223 const SourceManager &SM) {
1224 if (!DiagOpts->ShowParseableFixits)
1227 // We follow FixItRewriter's example in not (yet) handling
1228 // fix-its in macros.
1229 for (ArrayRef<FixItHint>::iterator I = Hints.begin(), E = Hints.end();
1231 if (I->RemoveRange.isInvalid() ||
1232 I->RemoveRange.getBegin().isMacroID() ||
1233 I->RemoveRange.getEnd().isMacroID())
1237 for (ArrayRef<FixItHint>::iterator I = Hints.begin(), E = Hints.end();
1239 SourceLocation BLoc = I->RemoveRange.getBegin();
1240 SourceLocation ELoc = I->RemoveRange.getEnd();
1242 std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(BLoc);
1243 std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(ELoc);
1245 // Adjust for token ranges.
1246 if (I->RemoveRange.isTokenRange())
1247 EInfo.second += Lexer::MeasureTokenLength(ELoc, SM, LangOpts);
1249 // We specifically do not do word-wrapping or tab-expansion here,
1250 // because this is supposed to be easy to parse.
1251 PresumedLoc PLoc = SM.getPresumedLoc(BLoc);
1252 if (PLoc.isInvalid())
1256 OS.write_escaped(PLoc.getFilename());
1257 OS << "\":{" << SM.getLineNumber(BInfo.first, BInfo.second)
1258 << ':' << SM.getColumnNumber(BInfo.first, BInfo.second)
1259 << '-' << SM.getLineNumber(EInfo.first, EInfo.second)
1260 << ':' << SM.getColumnNumber(EInfo.first, EInfo.second)
1262 OS.write_escaped(I->CodeToInsert);