Supplier

Supplier function

A supplier is a function without any parameter, but returns a value.

When to use a supplier function?

When you need a function which supplies a value but there is no input for that.

When code execution is deferred as it is described in this article

In Dotnet there is no such thing as supplier interface like there is in java. Dotnet uses Func<TResult> (source) delegate type for this purpose.

Where it is used

Fun

In the example below there is a silly name creator where the first name and the last name suppliers are Func<TResult> delegates. The delegates are invoked in the Print method.

The interface where the properties are Func<TResult> delegate types.

The implementation of the IName interface.

A test where the IName is instantiated and executed.