// simplifies equality expression
// A.Equal(B) => (A, B)
// A.NotEqual(B) => (A, B, false)
internal static Expression EqualitySimplifier(ScalarArgument argument1, ScalarArgument argument2, bool equality = true)
{
argument1 = argument1 == null ? Designer.Null : argument1;
Expression expression = null;
if (argument2 == null ||
(argument2.Original is Value && (Value)argument2.Original == Designer.Null))
{
if (equality)
{
expression = argument1.IsNull();
}
else
{
expression = argument1.IsNotNull();
}
}
else
{
if (equality)
{
expression = argument1.EqualTo(argument2);
}
else
{
expression = argument1.NotEqualTo(argument2);
}
}
expression.Arguments = new[] { argument1, argument2 };
return(expression);
}
