SourceRangeContainer FollowSymbol::followSymbol(CXTranslationUnit tu,
const Cursor &fullCursor,
uint line,
uint column)
{
std::unique_ptr<Tokens> tokens(new Tokens(fullCursor));
if (!tokens->tokenCount)
tokens.reset(new Tokens(tu));
if (!tokens->tokenCount)
return SourceRangeContainer();
QVector<CXCursor> cursors(static_cast<int>(tokens->tokenCount));
clang_annotateTokens(tu, tokens->data, tokens->tokenCount, cursors.data());
int tokenIndex = getTokenIndex(tu, *tokens, line, column);
QTC_ASSERT(tokenIndex >= 0, return SourceRangeContainer());
const Utf8String tokenSpelling = ClangString(
clang_getTokenSpelling(tu, tokens->data[tokenIndex]));
if (tokenSpelling.isEmpty())
return SourceRangeContainer();
Cursor cursor{cursors[tokenIndex]};
if (cursor.kind() == CXCursor_InclusionDirective) {
CXFile file = clang_getIncludedFile(cursors[tokenIndex]);
const ClangString filename(clang_getFileName(file));
const SourceLocation loc(tu, filename, 1, 1);
return SourceRange(loc, loc);
}
// For definitions we can always find a declaration in current TU
if (cursor.isDefinition())
return extractMatchingTokenRange(cursor.canonical(), tokenSpelling);
if (!cursor.isDeclaration()) {
// This is the symbol usage
// We want to return definition
cursor = cursor.referenced();
if (cursor.isNull() || !cursor.isDefinition()) {
// We can't find definition in this TU
return SourceRangeContainer();
}
return extractMatchingTokenRange(cursor, tokenSpelling);
}
cursor = cursor.definition();
// If we are able to find a definition in current TU
if (!cursor.isNull())
return extractMatchingTokenRange(cursor, tokenSpelling);
return SourceRangeContainer();
}
SourceRangeContainer SourceRange::toSourceRangeContainer() const
{
return SourceRangeContainer(start().toSourceLocationContainer(),
end().toSourceLocationContainer());
}