Function ParseCommandString

src/strgen/strgen_base.cpp:329–369

returns cmd == nullptr on eof */

/* returns cmd == nullptr on eof */
static ParsedCommandString ParseCommandString(StringConsumer &consumer)
{
	ParsedCommandString result;

	/* Scan to the next command, exit if there's no next command. */
	consumer.SkipUntilChar('{', StringConsumer::KEEP_SEPARATOR);
	if (!consumer.ReadCharIf('{')) return {};

	if (auto argno = consumer.TryReadIntegerBase<uint32_t>(10); argno.has_value()) {
		result.argno = argno;
		if (!consumer.ReadCharIf(':')) StrgenFatal("missing arg #");
	}

	/* parse command name */
	auto command = consumer.ReadUntilCharIn("} =.");
	result.cmd = FindCmd(command);
	if (result.cmd == nullptr) {
		StrgenError("Undefined command '{}'", command);
		return {};
	}

	/* parse case */
	if (consumer.ReadCharIf('.')) {
		if (!result.cmd->flags.Test(CmdFlag::Case)) {
			StrgenFatal("Command '{}' can't have a case", result.cmd->cmd);
		}

		auto casep = consumer.ReadUntilCharIn("} ");
		result.casei = ResolveCaseName(casep);
	}

	/* parse params */
	result.param = consumer.ReadUntilChar('}', StringConsumer::KEEP_SEPARATOR);

	if (!consumer.ReadCharIf('}')) {
		StrgenError("Missing }} from command '{}'", result.cmd->cmd);
		return {};
	}

	return result;
}

/**
 * Prepare reading.