зеркало из https://github.com/microsoft/clang-1.git
958 строки
35 KiB
C++
958 строки
35 KiB
C++
//===--- TextDiagnosticPrinter.cpp - Diagnostic Printer -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This diagnostic client prints out their diagnostic messages.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Frontend/DiagnosticOptions.h"
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#include "clang/Lex/Lexer.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringExtras.h"
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#include <algorithm>
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using namespace clang;
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static const enum llvm::raw_ostream::Colors noteColor =
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llvm::raw_ostream::BLACK;
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static const enum llvm::raw_ostream::Colors fixitColor =
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llvm::raw_ostream::GREEN;
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static const enum llvm::raw_ostream::Colors caretColor =
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llvm::raw_ostream::GREEN;
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static const enum llvm::raw_ostream::Colors warningColor =
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llvm::raw_ostream::MAGENTA;
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static const enum llvm::raw_ostream::Colors errorColor = llvm::raw_ostream::RED;
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static const enum llvm::raw_ostream::Colors fatalColor = llvm::raw_ostream::RED;
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// Used for changing only the bold attribute.
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static const enum llvm::raw_ostream::Colors savedColor =
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llvm::raw_ostream::SAVEDCOLOR;
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/// \brief Number of spaces to indent when word-wrapping.
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const unsigned WordWrapIndentation = 6;
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TextDiagnosticPrinter::TextDiagnosticPrinter(llvm::raw_ostream &os,
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const DiagnosticOptions &diags,
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bool _OwnsOutputStream)
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: OS(os), LangOpts(0), DiagOpts(&diags),
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LastCaretDiagnosticWasNote(0),
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OwnsOutputStream(_OwnsOutputStream) {
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}
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TextDiagnosticPrinter::~TextDiagnosticPrinter() {
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if (OwnsOutputStream)
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delete &OS;
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}
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void TextDiagnosticPrinter::
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PrintIncludeStack(SourceLocation Loc, const SourceManager &SM) {
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if (Loc.isInvalid()) return;
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PresumedLoc PLoc = SM.getPresumedLoc(Loc);
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// Print out the other include frames first.
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PrintIncludeStack(PLoc.getIncludeLoc(), SM);
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if (DiagOpts->ShowLocation)
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OS << "In file included from " << PLoc.getFilename()
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<< ':' << PLoc.getLine() << ":\n";
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else
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OS << "In included file:\n";
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}
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/// HighlightRange - Given a SourceRange and a line number, highlight (with ~'s)
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/// any characters in LineNo that intersect the SourceRange.
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void TextDiagnosticPrinter::HighlightRange(const CharSourceRange &R,
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const SourceManager &SM,
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unsigned LineNo, FileID FID,
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std::string &CaretLine,
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const std::string &SourceLine) {
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assert(CaretLine.size() == SourceLine.size() &&
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"Expect a correspondence between source and caret line!");
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if (!R.isValid()) return;
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SourceLocation Begin = SM.getInstantiationLoc(R.getBegin());
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SourceLocation End = SM.getInstantiationLoc(R.getEnd());
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// If the End location and the start location are the same and are a macro
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// location, then the range was something that came from a macro expansion
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// or _Pragma. If this is an object-like macro, the best we can do is to
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// highlight the range. If this is a function-like macro, we'd also like to
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// highlight the arguments.
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if (Begin == End && R.getEnd().isMacroID())
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End = SM.getInstantiationRange(R.getEnd()).second;
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unsigned StartLineNo = SM.getInstantiationLineNumber(Begin);
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if (StartLineNo > LineNo || SM.getFileID(Begin) != FID)
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return; // No intersection.
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unsigned EndLineNo = SM.getInstantiationLineNumber(End);
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if (EndLineNo < LineNo || SM.getFileID(End) != FID)
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return; // No intersection.
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// Compute the column number of the start.
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unsigned StartColNo = 0;
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if (StartLineNo == LineNo) {
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StartColNo = SM.getInstantiationColumnNumber(Begin);
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if (StartColNo) --StartColNo; // Zero base the col #.
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}
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// Compute the column number of the end.
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unsigned EndColNo = CaretLine.size();
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if (EndLineNo == LineNo) {
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EndColNo = SM.getInstantiationColumnNumber(End);
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if (EndColNo) {
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--EndColNo; // Zero base the col #.
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// Add in the length of the token, so that we cover multi-char tokens if
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// this is a token range.
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if (R.isTokenRange())
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EndColNo += Lexer::MeasureTokenLength(End, SM, *LangOpts);
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} else {
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EndColNo = CaretLine.size();
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}
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}
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assert(StartColNo <= EndColNo && "Invalid range!");
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// Check that a token range does not highlight only whitespace.
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if (R.isTokenRange()) {
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// Pick the first non-whitespace column.
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while (StartColNo < SourceLine.size() &&
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(SourceLine[StartColNo] == ' ' || SourceLine[StartColNo] == '\t'))
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++StartColNo;
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// Pick the last non-whitespace column.
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if (EndColNo > SourceLine.size())
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EndColNo = SourceLine.size();
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while (EndColNo-1 &&
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(SourceLine[EndColNo-1] == ' ' || SourceLine[EndColNo-1] == '\t'))
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--EndColNo;
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// If the start/end passed each other, then we are trying to highlight a range
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// that just exists in whitespace, which must be some sort of other bug.
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assert(StartColNo <= EndColNo && "Trying to highlight whitespace??");
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}
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// Fill the range with ~'s.
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for (unsigned i = StartColNo; i < EndColNo; ++i)
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CaretLine[i] = '~';
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}
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/// \brief When the source code line we want to print is too long for
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/// the terminal, select the "interesting" region.
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static void SelectInterestingSourceRegion(std::string &SourceLine,
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std::string &CaretLine,
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std::string &FixItInsertionLine,
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unsigned EndOfCaretToken,
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unsigned Columns) {
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unsigned MaxSize = std::max(SourceLine.size(),
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std::max(CaretLine.size(),
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FixItInsertionLine.size()));
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if (MaxSize > SourceLine.size())
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SourceLine.resize(MaxSize, ' ');
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if (MaxSize > CaretLine.size())
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CaretLine.resize(MaxSize, ' ');
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if (!FixItInsertionLine.empty() && MaxSize > FixItInsertionLine.size())
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FixItInsertionLine.resize(MaxSize, ' ');
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// Find the slice that we need to display the full caret line
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// correctly.
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unsigned CaretStart = 0, CaretEnd = CaretLine.size();
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for (; CaretStart != CaretEnd; ++CaretStart)
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if (!isspace(CaretLine[CaretStart]))
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break;
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for (; CaretEnd != CaretStart; --CaretEnd)
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if (!isspace(CaretLine[CaretEnd - 1]))
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break;
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// Make sure we don't chop the string shorter than the caret token
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// itself.
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if (CaretEnd < EndOfCaretToken)
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CaretEnd = EndOfCaretToken;
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// If we have a fix-it line, make sure the slice includes all of the
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// fix-it information.
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if (!FixItInsertionLine.empty()) {
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unsigned FixItStart = 0, FixItEnd = FixItInsertionLine.size();
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for (; FixItStart != FixItEnd; ++FixItStart)
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if (!isspace(FixItInsertionLine[FixItStart]))
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break;
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for (; FixItEnd != FixItStart; --FixItEnd)
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if (!isspace(FixItInsertionLine[FixItEnd - 1]))
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break;
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if (FixItStart < CaretStart)
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CaretStart = FixItStart;
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if (FixItEnd > CaretEnd)
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CaretEnd = FixItEnd;
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}
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// CaretLine[CaretStart, CaretEnd) contains all of the interesting
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// parts of the caret line. While this slice is smaller than the
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// number of columns we have, try to grow the slice to encompass
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// more context.
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// If the end of the interesting region comes before we run out of
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// space in the terminal, start at the beginning of the line.
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if (Columns > 3 && CaretEnd < Columns - 3)
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CaretStart = 0;
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unsigned TargetColumns = Columns;
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if (TargetColumns > 8)
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TargetColumns -= 8; // Give us extra room for the ellipses.
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unsigned SourceLength = SourceLine.size();
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while ((CaretEnd - CaretStart) < TargetColumns) {
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bool ExpandedRegion = false;
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// Move the start of the interesting region left until we've
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// pulled in something else interesting.
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if (CaretStart == 1)
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CaretStart = 0;
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else if (CaretStart > 1) {
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unsigned NewStart = CaretStart - 1;
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// Skip over any whitespace we see here; we're looking for
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// another bit of interesting text.
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while (NewStart && isspace(SourceLine[NewStart]))
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--NewStart;
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// Skip over this bit of "interesting" text.
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while (NewStart && !isspace(SourceLine[NewStart]))
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--NewStart;
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// Move up to the non-whitespace character we just saw.
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if (NewStart)
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++NewStart;
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// If we're still within our limit, update the starting
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// position within the source/caret line.
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if (CaretEnd - NewStart <= TargetColumns) {
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CaretStart = NewStart;
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ExpandedRegion = true;
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}
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}
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// Move the end of the interesting region right until we've
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// pulled in something else interesting.
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if (CaretEnd != SourceLength) {
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assert(CaretEnd < SourceLength && "Unexpected caret position!");
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unsigned NewEnd = CaretEnd;
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// Skip over any whitespace we see here; we're looking for
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// another bit of interesting text.
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while (NewEnd != SourceLength && isspace(SourceLine[NewEnd - 1]))
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++NewEnd;
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// Skip over this bit of "interesting" text.
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while (NewEnd != SourceLength && !isspace(SourceLine[NewEnd - 1]))
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++NewEnd;
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if (NewEnd - CaretStart <= TargetColumns) {
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CaretEnd = NewEnd;
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ExpandedRegion = true;
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}
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}
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if (!ExpandedRegion)
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break;
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}
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// [CaretStart, CaretEnd) is the slice we want. Update the various
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// output lines to show only this slice, with two-space padding
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// before the lines so that it looks nicer.
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if (CaretEnd < SourceLine.size())
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SourceLine.replace(CaretEnd, std::string::npos, "...");
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if (CaretEnd < CaretLine.size())
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CaretLine.erase(CaretEnd, std::string::npos);
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if (FixItInsertionLine.size() > CaretEnd)
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FixItInsertionLine.erase(CaretEnd, std::string::npos);
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if (CaretStart > 2) {
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SourceLine.replace(0, CaretStart, " ...");
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CaretLine.replace(0, CaretStart, " ");
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if (FixItInsertionLine.size() >= CaretStart)
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FixItInsertionLine.replace(0, CaretStart, " ");
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}
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}
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void TextDiagnosticPrinter::EmitCaretDiagnostic(SourceLocation Loc,
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CharSourceRange *Ranges,
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unsigned NumRanges,
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const SourceManager &SM,
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const FixItHint *Hints,
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unsigned NumHints,
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unsigned Columns,
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unsigned OnMacroInst,
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unsigned MacroSkipStart,
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unsigned MacroSkipEnd) {
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assert(LangOpts && "Unexpected diagnostic outside source file processing");
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assert(!Loc.isInvalid() && "must have a valid source location here");
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// If this is a macro ID, first emit information about where this was
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// instantiated (recursively) then emit information about where the token was
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// spelled from.
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if (!Loc.isFileID()) {
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// Whether to suppress printing this macro instantiation.
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bool Suppressed
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= OnMacroInst >= MacroSkipStart && OnMacroInst < MacroSkipEnd;
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SourceLocation OneLevelUp = SM.getImmediateInstantiationRange(Loc).first;
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// FIXME: Map ranges?
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EmitCaretDiagnostic(OneLevelUp, Ranges, NumRanges, SM, 0, 0, Columns,
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OnMacroInst + 1, MacroSkipStart, MacroSkipEnd);
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// Map the location.
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Loc = SM.getImmediateSpellingLoc(Loc);
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// Map the ranges.
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for (unsigned i = 0; i != NumRanges; ++i) {
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CharSourceRange &R = Ranges[i];
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SourceLocation S = R.getBegin(), E = R.getEnd();
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if (S.isMacroID())
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R.setBegin(SM.getImmediateSpellingLoc(S));
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if (E.isMacroID())
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R.setEnd(SM.getImmediateSpellingLoc(E));
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}
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if (!Suppressed) {
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// Get the pretty name, according to #line directives etc.
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PresumedLoc PLoc = SM.getPresumedLoc(Loc);
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// If this diagnostic is not in the main file, print out the
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// "included from" lines.
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if (LastWarningLoc != PLoc.getIncludeLoc()) {
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LastWarningLoc = PLoc.getIncludeLoc();
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PrintIncludeStack(LastWarningLoc, SM);
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}
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if (DiagOpts->ShowLocation) {
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// Emit the file/line/column that this expansion came from.
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OS << PLoc.getFilename() << ':' << PLoc.getLine() << ':';
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if (DiagOpts->ShowColumn)
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OS << PLoc.getColumn() << ':';
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OS << ' ';
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}
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OS << "note: instantiated from:\n";
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EmitCaretDiagnostic(Loc, Ranges, NumRanges, SM, Hints, NumHints, Columns,
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OnMacroInst + 1, MacroSkipStart, MacroSkipEnd);
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return;
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}
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if (OnMacroInst == MacroSkipStart) {
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// Tell the user that we've skipped contexts.
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OS << "note: (skipping " << (MacroSkipEnd - MacroSkipStart)
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<< " contexts in backtrace; use -fmacro-backtrace-limit=0 to see "
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"all)\n";
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}
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return;
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}
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// Decompose the location into a FID/Offset pair.
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std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
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FileID FID = LocInfo.first;
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unsigned FileOffset = LocInfo.second;
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// Get information about the buffer it points into.
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bool Invalid = false;
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const char *BufStart = SM.getBufferData(FID, &Invalid).data();
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if (Invalid)
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return;
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unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
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unsigned CaretEndColNo
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= ColNo + Lexer::MeasureTokenLength(Loc, SM, *LangOpts);
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// Rewind from the current position to the start of the line.
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const char *TokPtr = BufStart+FileOffset;
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const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based.
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// Compute the line end. Scan forward from the error position to the end of
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// the line.
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const char *LineEnd = TokPtr;
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while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0')
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++LineEnd;
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// FIXME: This shouldn't be necessary, but the CaretEndColNo can extend past
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// the source line length as currently being computed. See
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// test/Misc/message-length.c.
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CaretEndColNo = std::min(CaretEndColNo, unsigned(LineEnd - LineStart));
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// Copy the line of code into an std::string for ease of manipulation.
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std::string SourceLine(LineStart, LineEnd);
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// Create a line for the caret that is filled with spaces that is the same
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// length as the line of source code.
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std::string CaretLine(LineEnd-LineStart, ' ');
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// Highlight all of the characters covered by Ranges with ~ characters.
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if (NumRanges) {
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unsigned LineNo = SM.getLineNumber(FID, FileOffset);
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for (unsigned i = 0, e = NumRanges; i != e; ++i)
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HighlightRange(Ranges[i], SM, LineNo, FID, CaretLine, SourceLine);
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}
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// Next, insert the caret itself.
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if (ColNo-1 < CaretLine.size())
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CaretLine[ColNo-1] = '^';
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else
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CaretLine.push_back('^');
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// Scan the source line, looking for tabs. If we find any, manually expand
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// them to spaces and update the CaretLine to match.
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for (unsigned i = 0; i != SourceLine.size(); ++i) {
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if (SourceLine[i] != '\t') continue;
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// Replace this tab with at least one space.
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SourceLine[i] = ' ';
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// Compute the number of spaces we need to insert.
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unsigned TabStop = DiagOpts->TabStop;
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assert(0 < TabStop && TabStop <= DiagnosticOptions::MaxTabStop &&
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"Invalid -ftabstop value");
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unsigned NumSpaces = ((i+TabStop)/TabStop * TabStop) - (i+1);
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assert(NumSpaces < TabStop && "Invalid computation of space amt");
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// Insert spaces into the SourceLine.
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SourceLine.insert(i+1, NumSpaces, ' ');
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// Insert spaces or ~'s into CaretLine.
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CaretLine.insert(i+1, NumSpaces, CaretLine[i] == '~' ? '~' : ' ');
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}
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// If we are in -fdiagnostics-print-source-range-info mode, we are trying to
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// produce easily machine parsable output. Add a space before the source line
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// and the caret to make it trivial to tell the main diagnostic line from what
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// the user is intended to see.
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if (DiagOpts->ShowSourceRanges) {
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SourceLine = ' ' + SourceLine;
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CaretLine = ' ' + CaretLine;
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}
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std::string FixItInsertionLine;
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if (NumHints && DiagOpts->ShowFixits) {
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for (const FixItHint *Hint = Hints, *LastHint = Hints + NumHints;
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Hint != LastHint; ++Hint) {
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if (Hint->InsertionLoc.isValid()) {
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// We have an insertion hint. Determine whether the inserted
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// code is on the same line as the caret.
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std::pair<FileID, unsigned> HintLocInfo
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= SM.getDecomposedInstantiationLoc(Hint->InsertionLoc);
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if (SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) ==
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SM.getLineNumber(FID, FileOffset)) {
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// Insert the new code into the line just below the code
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// that the user wrote.
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unsigned HintColNo
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= SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second);
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unsigned LastColumnModified
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= HintColNo - 1 + Hint->CodeToInsert.size();
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if (LastColumnModified > FixItInsertionLine.size())
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FixItInsertionLine.resize(LastColumnModified, ' ');
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std::copy(Hint->CodeToInsert.begin(), Hint->CodeToInsert.end(),
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FixItInsertionLine.begin() + HintColNo - 1);
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} else {
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FixItInsertionLine.clear();
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break;
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}
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}
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}
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// Now that we have the entire fixit line, expand the tabs in it.
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// Since we don't want to insert spaces in the middle of a word,
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// find each word and the column it should line up with and insert
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// 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();
|
|
}
|
|
}
|
|
|
|
/// \brief Skip over whitespace in the string, starting at the given
|
|
/// index.
|
|
///
|
|
/// \returns The index of the first non-whitespace character that is
|
|
/// greater than or equal to Idx or, if no such character exists,
|
|
/// returns the end of the string.
|
|
static unsigned skipWhitespace(unsigned Idx,
|
|
const llvm::SmallVectorImpl<char> &Str,
|
|
unsigned Length) {
|
|
while (Idx < Length && isspace(Str[Idx]))
|
|
++Idx;
|
|
return Idx;
|
|
}
|
|
|
|
/// \brief If the given character is the start of some kind of
|
|
/// balanced punctuation (e.g., quotes or parentheses), return the
|
|
/// character that will terminate the punctuation.
|
|
///
|
|
/// \returns The ending punctuation character, if any, or the NULL
|
|
/// character if the input character does not start any punctuation.
|
|
static inline char findMatchingPunctuation(char c) {
|
|
switch (c) {
|
|
case '\'': return '\'';
|
|
case '`': return '\'';
|
|
case '"': return '"';
|
|
case '(': return ')';
|
|
case '[': return ']';
|
|
case '{': return '}';
|
|
default: break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// \brief Find the end of the word starting at the given offset
|
|
/// within a string.
|
|
///
|
|
/// \returns the index pointing one character past the end of the
|
|
/// word.
|
|
static unsigned findEndOfWord(unsigned Start,
|
|
const llvm::SmallVectorImpl<char> &Str,
|
|
unsigned Length, unsigned Column,
|
|
unsigned Columns) {
|
|
assert(Start < Str.size() && "Invalid start position!");
|
|
unsigned End = Start + 1;
|
|
|
|
// If we are already at the end of the string, take that as the word.
|
|
if (End == Str.size())
|
|
return End;
|
|
|
|
// Determine if the start of the string is actually opening
|
|
// punctuation, e.g., a quote or parentheses.
|
|
char EndPunct = findMatchingPunctuation(Str[Start]);
|
|
if (!EndPunct) {
|
|
// This is a normal word. Just find the first space character.
|
|
while (End < Length && !isspace(Str[End]))
|
|
++End;
|
|
return End;
|
|
}
|
|
|
|
// We have the start of a balanced punctuation sequence (quotes,
|
|
// parentheses, etc.). Determine the full sequence is.
|
|
llvm::SmallString<16> PunctuationEndStack;
|
|
PunctuationEndStack.push_back(EndPunct);
|
|
while (End < Length && !PunctuationEndStack.empty()) {
|
|
if (Str[End] == PunctuationEndStack.back())
|
|
PunctuationEndStack.pop_back();
|
|
else if (char SubEndPunct = findMatchingPunctuation(Str[End]))
|
|
PunctuationEndStack.push_back(SubEndPunct);
|
|
|
|
++End;
|
|
}
|
|
|
|
// Find the first space character after the punctuation ended.
|
|
while (End < Length && !isspace(Str[End]))
|
|
++End;
|
|
|
|
unsigned PunctWordLength = End - Start;
|
|
if (// If the word fits on this line
|
|
Column + PunctWordLength <= Columns ||
|
|
// ... or the word is "short enough" to take up the next line
|
|
// without too much ugly white space
|
|
PunctWordLength < Columns/3)
|
|
return End; // Take the whole thing as a single "word".
|
|
|
|
// The whole quoted/parenthesized string is too long to print as a
|
|
// single "word". Instead, find the "word" that starts just after
|
|
// the punctuation and use that end-point instead. This will recurse
|
|
// until it finds something small enough to consider a word.
|
|
return findEndOfWord(Start + 1, Str, Length, Column + 1, Columns);
|
|
}
|
|
|
|
/// \brief Print the given string to a stream, word-wrapping it to
|
|
/// some number of columns in the process.
|
|
///
|
|
/// \brief OS the stream to which the word-wrapping string will be
|
|
/// emitted.
|
|
///
|
|
/// \brief Str the string to word-wrap and output.
|
|
///
|
|
/// \brief Columns the number of columns to word-wrap to.
|
|
///
|
|
/// \brief Column the column number at which the first character of \p
|
|
/// Str will be printed. This will be non-zero when part of the first
|
|
/// line has already been printed.
|
|
///
|
|
/// \brief Indentation the number of spaces to indent any lines beyond
|
|
/// the first line.
|
|
///
|
|
/// \returns true if word-wrapping was required, or false if the
|
|
/// string fit on the first line.
|
|
static bool PrintWordWrapped(llvm::raw_ostream &OS,
|
|
const llvm::SmallVectorImpl<char> &Str,
|
|
unsigned Columns,
|
|
unsigned Column = 0,
|
|
unsigned Indentation = WordWrapIndentation) {
|
|
unsigned Length = Str.size();
|
|
|
|
// If there is a newline in this message somewhere, find that
|
|
// newline and split the message into the part before the newline
|
|
// (which will be word-wrapped) and the part from the newline one
|
|
// (which will be emitted unchanged).
|
|
for (unsigned I = 0; I != Length; ++I)
|
|
if (Str[I] == '\n') {
|
|
Length = I;
|
|
break;
|
|
}
|
|
|
|
// The string used to indent each line.
|
|
llvm::SmallString<16> IndentStr;
|
|
IndentStr.assign(Indentation, ' ');
|
|
bool Wrapped = false;
|
|
for (unsigned WordStart = 0, WordEnd; WordStart < Length;
|
|
WordStart = WordEnd) {
|
|
// Find the beginning of the next word.
|
|
WordStart = skipWhitespace(WordStart, Str, Length);
|
|
if (WordStart == Length)
|
|
break;
|
|
|
|
// Find the end of this word.
|
|
WordEnd = findEndOfWord(WordStart, Str, Length, Column, Columns);
|
|
|
|
// Does this word fit on the current line?
|
|
unsigned WordLength = WordEnd - WordStart;
|
|
if (Column + WordLength < Columns) {
|
|
// This word fits on the current line; print it there.
|
|
if (WordStart) {
|
|
OS << ' ';
|
|
Column += 1;
|
|
}
|
|
OS.write(&Str[WordStart], WordLength);
|
|
Column += WordLength;
|
|
continue;
|
|
}
|
|
|
|
// This word does not fit on the current line, so wrap to the next
|
|
// line.
|
|
OS << '\n';
|
|
OS.write(&IndentStr[0], Indentation);
|
|
OS.write(&Str[WordStart], WordLength);
|
|
Column = Indentation + WordLength;
|
|
Wrapped = true;
|
|
}
|
|
|
|
if (Length == Str.size())
|
|
return Wrapped; // We're done.
|
|
|
|
// There is a newline in the message, followed by something that
|
|
// will not be word-wrapped. Print that.
|
|
OS.write(&Str[Length], Str.size() - Length);
|
|
return true;
|
|
}
|
|
|
|
void TextDiagnosticPrinter::HandleDiagnostic(Diagnostic::Level Level,
|
|
const DiagnosticInfo &Info) {
|
|
// Keeps track of the the starting position of the location
|
|
// information (e.g., "foo.c:10:4:") that precedes the error
|
|
// message. We use this information to determine how long the
|
|
// file+line+column number prefix is.
|
|
uint64_t StartOfLocationInfo = OS.tell();
|
|
|
|
if (!Prefix.empty())
|
|
OS << Prefix << ": ";
|
|
|
|
// If the location is specified, print out a file/line/col and include trace
|
|
// if enabled.
|
|
if (Info.getLocation().isValid()) {
|
|
const SourceManager &SM = Info.getLocation().getManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(Info.getLocation());
|
|
unsigned LineNo = PLoc.getLine();
|
|
|
|
// First, 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);
|
|
StartOfLocationInfo = OS.tell();
|
|
}
|
|
|
|
// Compute the column number.
|
|
if (DiagOpts->ShowLocation) {
|
|
if (DiagOpts->ShowColors)
|
|
OS.changeColor(savedColor, true);
|
|
|
|
// Emit a Visual Studio compatible line number syntax.
|
|
if (LangOpts && LangOpts->Microsoft) {
|
|
OS << PLoc.getFilename() << '(' << LineNo << ')';
|
|
OS << " : ";
|
|
} else {
|
|
OS << PLoc.getFilename() << ':' << LineNo << ':';
|
|
if (DiagOpts->ShowColumn)
|
|
if (unsigned ColNo = PLoc.getColumn())
|
|
OS << ColNo << ':';
|
|
}
|
|
if (DiagOpts->ShowSourceRanges && Info.getNumRanges()) {
|
|
FileID CaretFileID =
|
|
SM.getFileID(SM.getInstantiationLoc(Info.getLocation()));
|
|
bool PrintedRange = false;
|
|
|
|
for (unsigned i = 0, e = Info.getNumRanges(); i != e; ++i) {
|
|
// Ignore invalid ranges.
|
|
if (!Info.getRange(i).isValid()) continue;
|
|
|
|
SourceLocation B = Info.getRange(i).getBegin();
|
|
SourceLocation E = Info.getRange(i).getEnd();
|
|
B = SM.getInstantiationLoc(B);
|
|
E = SM.getInstantiationLoc(E);
|
|
|
|
// If the End location and the start location are the same and are a
|
|
// macro location, then the range was something that came from a macro
|
|
// expansion or _Pragma. If this is an object-like macro, the best we
|
|
// can do is to highlight the range. If this is a function-like
|
|
// macro, we'd also like to highlight the arguments.
|
|
if (B == E && Info.getRange(i).getEnd().isMacroID())
|
|
E = SM.getInstantiationRange(Info.getRange(i).getEnd()).second;
|
|
|
|
std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(B);
|
|
std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(E);
|
|
|
|
// If the start or end of the range is in another file, just discard
|
|
// it.
|
|
if (BInfo.first != CaretFileID || EInfo.first != CaretFileID)
|
|
continue;
|
|
|
|
// Add in the length of the token, so that we cover multi-char tokens.
|
|
unsigned TokSize = 0;
|
|
if (Info.getRange(i).isTokenRange())
|
|
TokSize = Lexer::MeasureTokenLength(E, SM, *LangOpts);
|
|
|
|
OS << '{' << SM.getLineNumber(BInfo.first, BInfo.second) << ':'
|
|
<< SM.getColumnNumber(BInfo.first, BInfo.second) << '-'
|
|
<< SM.getLineNumber(EInfo.first, EInfo.second) << ':'
|
|
<< (SM.getColumnNumber(EInfo.first, EInfo.second)+TokSize) << '}';
|
|
PrintedRange = true;
|
|
}
|
|
|
|
if (PrintedRange)
|
|
OS << ':';
|
|
}
|
|
OS << ' ';
|
|
if (DiagOpts->ShowColors)
|
|
OS.resetColor();
|
|
}
|
|
}
|
|
|
|
if (DiagOpts->ShowColors) {
|
|
// Print diagnostic category in bold and color
|
|
switch (Level) {
|
|
case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
|
|
case Diagnostic::Note: OS.changeColor(noteColor, true); break;
|
|
case Diagnostic::Warning: OS.changeColor(warningColor, true); break;
|
|
case Diagnostic::Error: OS.changeColor(errorColor, true); break;
|
|
case Diagnostic::Fatal: OS.changeColor(fatalColor, true); break;
|
|
}
|
|
}
|
|
|
|
switch (Level) {
|
|
case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
|
|
case Diagnostic::Note: OS << "note: "; break;
|
|
case Diagnostic::Warning: OS << "warning: "; break;
|
|
case Diagnostic::Error: OS << "error: "; break;
|
|
case Diagnostic::Fatal: OS << "fatal error: "; break;
|
|
}
|
|
|
|
if (DiagOpts->ShowColors)
|
|
OS.resetColor();
|
|
|
|
llvm::SmallString<100> OutStr;
|
|
Info.FormatDiagnostic(OutStr);
|
|
|
|
std::string OptionName;
|
|
if (DiagOpts->ShowOptionNames) {
|
|
if (const char *Opt = Diagnostic::getWarningOptionForDiag(Info.getID())) {
|
|
OptionName = "-W";
|
|
OptionName += Opt;
|
|
} else if (Info.getID() == diag::fatal_too_many_errors) {
|
|
OptionName = "-ferror-limit=";
|
|
} else {
|
|
// If the diagnostic is an extension diagnostic and not enabled by default
|
|
// then it must have been turned on with -pedantic.
|
|
bool EnabledByDefault;
|
|
if (Diagnostic::isBuiltinExtensionDiag(Info.getID(), EnabledByDefault) &&
|
|
!EnabledByDefault)
|
|
OptionName = "-pedantic";
|
|
}
|
|
}
|
|
|
|
// If the user wants to see category information, include it too.
|
|
unsigned DiagCategory = 0;
|
|
if (DiagOpts->ShowCategories)
|
|
DiagCategory = Diagnostic::getCategoryNumberForDiag(Info.getID());
|
|
|
|
// If there is any categorization information, include it.
|
|
if (!OptionName.empty() || DiagCategory != 0) {
|
|
bool NeedsComma = false;
|
|
OutStr += " [";
|
|
|
|
if (!OptionName.empty()) {
|
|
OutStr += OptionName;
|
|
NeedsComma = true;
|
|
}
|
|
|
|
if (DiagCategory) {
|
|
if (NeedsComma) OutStr += ',';
|
|
if (DiagOpts->ShowCategories == 1)
|
|
OutStr += llvm::utostr(DiagCategory);
|
|
else {
|
|
assert(DiagOpts->ShowCategories == 2 && "Invalid ShowCategories value");
|
|
OutStr += Diagnostic::getCategoryNameFromID(DiagCategory);
|
|
}
|
|
}
|
|
|
|
OutStr += "]";
|
|
}
|
|
|
|
|
|
if (DiagOpts->ShowColors) {
|
|
// Print warnings, errors and fatal errors in bold, no color
|
|
switch (Level) {
|
|
case Diagnostic::Warning: OS.changeColor(savedColor, true); break;
|
|
case Diagnostic::Error: OS.changeColor(savedColor, true); break;
|
|
case Diagnostic::Fatal: OS.changeColor(savedColor, true); break;
|
|
default: break; //don't bold notes
|
|
}
|
|
}
|
|
|
|
if (DiagOpts->MessageLength) {
|
|
// We will be word-wrapping the error message, so compute the
|
|
// column number where we currently are (after printing the
|
|
// location information).
|
|
unsigned Column = OS.tell() - StartOfLocationInfo;
|
|
PrintWordWrapped(OS, OutStr, DiagOpts->MessageLength, Column);
|
|
} else {
|
|
OS.write(OutStr.begin(), OutStr.size());
|
|
}
|
|
OS << '\n';
|
|
if (DiagOpts->ShowColors)
|
|
OS.resetColor();
|
|
|
|
// If caret diagnostics are enabled and we have location, we want to
|
|
// emit the caret. However, we only do this if the location moved
|
|
// from the last diagnostic, if the last diagnostic was a note that
|
|
// was part of a different warning or error diagnostic, or if the
|
|
// diagnostic has ranges. We don't want to emit the same caret
|
|
// multiple times if one loc has multiple diagnostics.
|
|
if (DiagOpts->ShowCarets && Info.getLocation().isValid() &&
|
|
((LastLoc != Info.getLocation()) || Info.getNumRanges() ||
|
|
(LastCaretDiagnosticWasNote && Level != Diagnostic::Note) ||
|
|
Info.getNumFixItHints())) {
|
|
// Cache the LastLoc, it allows us to omit duplicate source/caret spewage.
|
|
LastLoc = Info.getLocation();
|
|
LastCaretDiagnosticWasNote = (Level == Diagnostic::Note);
|
|
|
|
// Get the ranges into a local array we can hack on.
|
|
CharSourceRange Ranges[20];
|
|
unsigned NumRanges = Info.getNumRanges();
|
|
assert(NumRanges < 20 && "Out of space");
|
|
for (unsigned i = 0; i != NumRanges; ++i)
|
|
Ranges[i] = Info.getRange(i);
|
|
|
|
unsigned NumHints = Info.getNumFixItHints();
|
|
for (unsigned i = 0; i != NumHints; ++i) {
|
|
const FixItHint &Hint = Info.getFixItHint(i);
|
|
if (Hint.RemoveRange.isValid()) {
|
|
assert(NumRanges < 20 && "Out of space");
|
|
Ranges[NumRanges++] = Hint.RemoveRange;
|
|
}
|
|
}
|
|
|
|
unsigned MacroInstSkipStart = 0, MacroInstSkipEnd = 0;
|
|
if (DiagOpts && DiagOpts->MacroBacktraceLimit && !LastLoc.isFileID()) {
|
|
// Compute the length of the macro-instantiation backtrace, so that we
|
|
// can establish which steps in the macro backtrace we'll skip.
|
|
SourceLocation Loc = LastLoc;
|
|
unsigned Depth = 0;
|
|
do {
|
|
++Depth;
|
|
Loc = LastLoc.getManager().getImmediateInstantiationRange(Loc).first;
|
|
} while (!Loc.isFileID());
|
|
|
|
if (Depth > DiagOpts->MacroBacktraceLimit) {
|
|
MacroInstSkipStart = DiagOpts->MacroBacktraceLimit / 2 +
|
|
DiagOpts->MacroBacktraceLimit % 2;
|
|
MacroInstSkipEnd = Depth - DiagOpts->MacroBacktraceLimit / 2;
|
|
}
|
|
}
|
|
|
|
EmitCaretDiagnostic(LastLoc, Ranges, NumRanges, LastLoc.getManager(),
|
|
Info.getFixItHints(),
|
|
Info.getNumFixItHints(),
|
|
DiagOpts->MessageLength,
|
|
0, MacroInstSkipStart, MacroInstSkipEnd);
|
|
}
|
|
|
|
OS.flush();
|
|
}
|