clang::Token GetTokenBefore(const clang::SourceManager &sources,
clang::SourceLocation loc) {
clang::Token token;
token.setKind(clang::tok::unknown);
clang::LangOptions lang_options;
loc = loc.getLocWithOffset(-1);
while (loc != sources.getLocForStartOfFile(sources.getFileID(loc))) {
loc = clang::Lexer::GetBeginningOfToken(loc, sources, lang_options);
if (!clang::Lexer::getRawToken(loc, token, sources, lang_options)) {
if (!token.is(clang::tok::comment)) {
break;
}
}
loc = loc.getLocWithOffset(-1);
}
return token;
}
clang::Token GetTokenAfterLocation(clang::SourceLocation loc,
const clang::SourceManager &source_manager) {
clang::Token token;
token.setKind(clang::tok::unknown);
clang::LangOptions lang_options;
loc = loc.getLocWithOffset(1);
while (loc !=
source_manager.getLocForEndOfFile(source_manager.getFileID(loc))) {
if (!clang::Lexer::getRawToken(loc, token, source_manager, lang_options)) {
if (!token.is(clang::tok::comment)) {
break;
}
loc = clang::Lexer::getLocForEndOfToken(token.getLocation(), /*Offset=*/0,
source_manager, lang_options);
} else {
loc = loc.getLocWithOffset(1);
}
}
return token;
}
clang::Token GetTokenBeforeLocation(clang::SourceLocation loc,
const clang::ASTContext& ast_context) {
clang::Token token;
token.setKind(clang::tok::unknown);
clang::LangOptions lang_options = ast_context.getLangOpts();
const clang::SourceManager& source_manager = ast_context.getSourceManager();
clang::SourceLocation file_start_loc =
source_manager.getLocForStartOfFile(source_manager.getFileID(loc));
loc = loc.getLocWithOffset(-1);
while (loc != file_start_loc) {
loc = clang::Lexer::GetBeginningOfToken(loc, source_manager, lang_options);
if (!clang::Lexer::getRawToken(loc, token, source_manager, lang_options)) {
if (!token.is(clang::tok::comment)) {
break;
}
}
loc = loc.getLocWithOffset(-1);
}
return token;
}