Method tryParseSourceNameMapping

libyul/ObjectParser.cpp:123–175

}

std::optional<SourceNameMap> ObjectParser::tryParseSourceNameMapping() const
{
	// @use-src 0:"abc.sol", 1:"foo.sol", 2:"bar.sol"
	//
	// UseSrcList := UseSrc (',' UseSrc)*
	// UseSrc     := [0-9]+ ':' FileName
	// FileName   := "(([^\"]|\.)*)"

	// Matches some "@use-src TEXT".
	static std::regex const lineRE = std::regex(
		"(^|\\s)@use-src\\b",
		std::regex_constants::ECMAScript | std::regex_constants::optimize
	);
	std::smatch sm;
	if (!std::regex_search(m_scanner->currentCommentLiteral(), sm, lineRE))
		return std::nullopt;

	solAssert(sm.size() == 2, "");
	auto text = m_scanner->currentCommentLiteral().substr(static_cast<size_t>(sm.position() + sm.length()));
	CharStream charStream(text, "");
	Scanner scanner(charStream);
	if (scanner.currentToken() == Token::EOS)
		return SourceNameMap{};
	SourceNameMap sourceNames;

	while (scanner.currentToken() != Token::EOS)
	{
		if (scanner.currentToken() != Token::Number)
			break;
		auto sourceIndex = toUnsignedInt(scanner.currentLiteral());
		if (!sourceIndex)
			break;
		if (scanner.next() != Token::Colon)
			break;
		if (scanner.next() != Token::StringLiteral)
			break;
		sourceNames[*sourceIndex] = std::make_shared<std::string const>(scanner.currentLiteral());

		Token const next = scanner.next();
		if (next == Token::EOS)
			return {std::move(sourceNames)};
		if (next != Token::Comma)
			break;
		scanner.next();
	}

	m_errorReporter.syntaxError(
		9804_error,
		m_scanner->currentCommentLocation(),
		"Error parsing arguments to @use-src. Expected: <number> \":\" \"<filename>\", ..."
	);
	return std::nullopt;
}

std::shared_ptr<AST> ObjectParser::parseBlock(std::optional<SourceNameMap> _sourceNames)
{