private static Number?DiscoverNumberValue([NotNull] BaseExpression expr)
{
if (expr is ConstantNumber con)
{
return(con.Value);
}
if (expr.IsConstant)
{
var s = expr.StaticEvaluate();
if (s.Type == Type.Number)
{
return(s.Number);
}
}
return(null);
}
private static string DiscoverStringValue([NotNull] BaseExpression expr)
{
if (expr is ConstantString con)
{
return(con.Value);
}
if (expr.IsConstant)
{
var s = expr.StaticEvaluate();
if (s.Type == Type.String)
{
return(s.String);
}
}
return(null);
}