/// <summary>
/// creates a new <see cref="Reference"/>
/// </summary>
/// <param name="argument">argument to use as reference parameter</param>
internal Reference(IAssignableToken argument)
{
this.argument = argument;
}
/// <summary>
/// creates a new <see cref="ReferenceParameter"/>
/// </summary>
/// <param name="index">index of parameter</param>
/// <param name="variable">variable to write parameter value to after call</param>
public ReferenceParameter(int index, IAssignableToken variable)
{
Index = index;
Variable = variable;
}