CreateFunction.cpp

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#include "BaseLib/ConfigTree.h"
#include "Function.h"
 
namespace MaterialPropertyLib
{
std::unique_ptr<Function> createFunction(BaseLib::ConfigTree const& config)
{
    config.checkConfigParameter("type", "Function");
 
    // Second access for storage.
    auto property_name = config.peekConfigParameter<std::string>("name");
 
    DBUG("Create Function property {:s}.", property_name);
 
    std::vector<std::string> value_expressions;
    auto const& value_config = config.getConfigSubtree("value");
 
    for (auto const& p : value_config.getConfigSubtreeList("expression"))
    {
        value_expressions.emplace_back(p.getValue<std::string>());
    }
 
    // For each derivative a name of the variable and the list of expressions.
    std::vector<std::pair<std::string, std::vector<std::string>>>
        dvalue_expressions;
    for (auto const& dvalue_config : config.getConfigSubtreeList("dvalue"))
    {
        auto variable_name =
            dvalue_config.getConfigParameter<std::string>("variable_name");
 
        std::vector<std::string> expressions;
        for (auto const& p : dvalue_config.getConfigSubtreeList("expression"))
        {
            expressions.emplace_back(p.getValue<std::string>());
        }
        dvalue_expressions.emplace_back(std::move(variable_name),
                                        std::move(expressions));
    }
 
    return std::make_unique<MaterialPropertyLib::Function>(
        std::move(property_name), value_expressions, dvalue_expressions);
}
}  // namespace MaterialPropertyLib