Overload resolution to take into account Generic Parameters. #177
Description
Overload resolution should bind to the overload that is most specific including generic type parameters (constrained or not)
Sub Foo(Of T As Struct)( Bar As T) // 0
Sub Foo(Of T As Class)( Bar As T) // 1
If Foo is called with an integer, then method 0 is used.
If Foo is called with a string, then method 1 is used.
This would allow the methods to me specialised for that type of object. For example the difference is the null checks in the case of a class type.
Public Function IsBetween(Of T As {class, IComparable(Of T) } )
( value As T,
lower as T,
upper as T
) As Boolean
If value Is Nothing Then Throw New NullArgumentException()
If lower Is Nothing Then Throw New NullArgumentException()
If upper Is Nothing Then Throw New NullArgumentException()
Return _IsBetween(Of T)( value, lower, upper )
End Function
Public Function IsBetween(Of T As {class, IComparable(Of T) } )
( value As T,
lower as T,
upper as T
) As Boolean
Return _IsBetween(Of T)( value, lower, upper)
End Function
Private Function _IsBetween(Of T As IComparable(Of T))
( value As T,
lower As T,
upper As T
) As Boolean
Return (lower.ComparedTo(value) <= 0) AndAlso
(value.ComparedTo(upper) <= 0)
End Function