CreateConstant.cpp

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#include "BaseLib/ConfigTree.h"
#include "Constant.h"
 
namespace MaterialPropertyLib
{
std::unique_ptr<Constant> createConstant(BaseLib::ConfigTree const& config)
{
    config.checkConfigParameter("type", "Constant");
 
    // Second access for storage.
    auto property_name = config.peekConfigParameter<std::string>("name");
 
    DBUG("Create Constant property {:s}.", property_name);
    auto const value_data =
        config.getConfigParameterOptional<std::vector<double>>("value");
 
    auto const values_data =
        config.getConfigParameterOptional<std::vector<double>>("values");
 
    if ((value_data) && (values_data))
    {
        OGS_FATAL(
            "Both the value and the values tags were given.\n\
             Please give only one of them.");
    }
 
    std::vector<double> values;
 
    if (value_data)
    {
        values = *value_data;
    }
    else if (values_data)
    {
        values = *values_data;
    }
 
    if (values.empty())
    {
        OGS_FATAL("No value(s) was(were) provided.");
    }
 
    DBUG("Using following values for the constant parameter:");
    for (double const v : values)
    {
        (void)v;  // unused value if building w/o DBUG output.
        DBUG("\t{:g}", v);
    }
 
    return std::make_unique<Constant>(std::move(property_name),
                                      fromVector(values));
}
}  // namespace MaterialPropertyLib