vtypechoice ~master (2022-05-22T19:59:43Z)

andThen

vtypechoice optional
Undocumented in source. Be warned that the author may not have intended to support it.
  1. auto andThen(Optional!T optional)
  2. auto andThen(Optional!T optional)
  3. auto andThen(Optional!T optional)
    auto
    andThen
    (
    alias pred
    T
    )
    (
    auto ref scope Optional!T optional
    )
    if (
    !isOptional!(typeof(pred(T.init))) &&
    !isSome!(typeof(pred(T.init)))
    &&
    !isNone!(typeof(pred(T.init)))
    )

Examples

alias O = Optional!int;
assert(O.none.andThen!(i => i + 3) == none);
assert(O.some(7).andThen!(i => i + 3) == 10.some);

Meta

Source

See Implementation

vtypechoice optional aliasesenumsfunctionsstructstemplates

Page generated by adrdox