struct Optional<T>¶

Conditionally conforms to: IDifferentiable, IDifferentiablePtrType

Description¶

Optional<T> is a type with one extra value than T, this extra value is used to represent a “missing” or “invalid” T. This extra value is called none.

none can be compared against with the operators == or !=.

An Optional<T> value can also be implicitly or explicitly constructed from a value of type T

Optional<T> values can be deconstructed with if(let myT=myOptionalT)… where this branch will only be taken if myOptionalT contains a value of type T (to be put into scope as myT).

Generic Parameters¶

T¶

Properties¶

hasValue ¶

Return true iff this Optional contains a value of type T

value ¶

If this Optional contains a value of type T return that.

Methods¶

Conditional Conformances¶

Conformance to IDifferentiable¶

Optional<T> additionally conforms to IDifferentiable when the following conditions are met:

T : IDifferentiable

Conformance to IDifferentiablePtrType¶

Optional<T> additionally conforms to IDifferentiablePtrType when the following conditions are met:

T : IDifferentiablePtrType