C++ (Cpp) optional::ignoreConfigParameter示例

示例#1

std::unique_ptr<AbstractJacobianAssembler> createJacobianAssembler(
    boost::optional<BaseLib::ConfigTree> const& config)
{
    if (!config)
        return std::unique_ptr<AbstractJacobianAssembler>(
            new AnalyticalJacobianAssembler);

    //! \ogs_file_param{process__jacobian_assembler__type}
    auto const type = config->peekConfigParameter<std::string>("type");

    if (type == "Analytical") {
        config->ignoreConfigParameter("type");
        return std::unique_ptr<AbstractJacobianAssembler>(
            new AnalyticalJacobianAssembler);
    } else if (type == "CentralDifferences") {
        return createCentralDifferencesJacobianAssembler(*config);
    }

    OGS_FATAL("Unknown Jacobian assembler type: `%s'.", type.c_str());
}