Closed
Description
Allows integer, floating-point, character, and string literals to produce objects of user-defined type by defining a user-defined suffix; providing a nice syntax for defining units of measure and domain-specific literals in a DDD context.
There is a similar feature in F# (MeasureAttribute) and (surprisingly) C++, but I really feel the need for this in C# as well.
As a regular operator:
class Distance {
...
public static literal operator Distance km(double p) { ... }
}
As an extension operator (#4945):
public static literal operator TimeSpan hour(this double h) { ... }
Using improved type aliases (#4884):
// helps with further extension methods
using Radian = double;
// maybe in another file
public static literal operator Radian deg(double degree) { ... }
Usage:
Math.Sin(30deg);