Function fromValueString

source/MaterialXCore/Value.cpp:107–173

}

template <class T> T fromValueString(const string& value)
{
    T data;
    
    if constexpr(std::is_same_v<T, string>)
    {
        data = value;
    }
    else if constexpr(std::is_same_v<T, bool>)
    {
        if (value == VALUE_STRING_TRUE)
            data = true;
        else if (value == VALUE_STRING_FALSE)
            data = false;
        else
            throw ExceptionTypeError("Type mismatch in boolean fromValueString: " + value);
    }
    else if constexpr(std::is_base_of_v<VectorBase, T>)
    {
        StringVec tokens = splitString(value, ARRAY_VALID_SEPARATORS);
        if (tokens.size() != data.numElements())
        {
            throw ExceptionTypeError("Type mismatch in vector fromValueString: " + value);
        }
        for (size_t i = 0; i < data.numElements(); i++)
        {
            data[i] = fromValueString<float>(tokens[i]);
        }
    }
    else if constexpr(std::is_base_of_v<MatrixBase, T>)
    {
        StringVec tokens = splitString(value, ARRAY_VALID_SEPARATORS);
        if (tokens.size() != data.numRows() * data.numColumns())
        {
            throw ExceptionTypeError("Type mismatch in matrix fromValueString: " + value);
        }
        for (size_t i = 0; i < data.numRows(); i++)
        {
            for (size_t j = 0; j < data.numColumns(); j++)
            {
                data[i][j] = fromValueString<float>(tokens[i * data.numRows() + j]);
            }
        }
    }
    else if constexpr(is_std_vector_v<T>)
    {
        // This code path parses an array of arbitrary substrings, so we split the string
        // in a fashion that preserves substrings with internal spaces.
        const string COMMA_SEPARATOR = ",";
        for (const string& token : splitString(value, COMMA_SEPARATOR))
        {
            typename T::value_type val = fromValueString<typename T::value_type>(trimSpaces(token));
            data.push_back(val);
        }
    }
    else
    {
        std::stringstream ss(value);