map

Namespace: FsToolkit.ErrorHandling

Apply a function to the value of a value task voption if it is ValueSome. If the voption is ValueNone, return ValueNone.

Function Signature

('input -> 'output) -> ValueTask<'input voption> -> ValueTask<'output voption>

Examples

Example 1

ValueTaskValueOption.map (fun x -> x + 1) (ValueTaskValueOption.valueSome 1)

// valueTask { ValueSome 2 }

Example 2

ValueTaskValueOption.map (fun x -> x + 1) (ValueTask<_>(ValueNone))

// valueTask { ValueNone }