std::option¶

Status: shipped

Data-last Option combinators for pipeline chaining: map, filter, default, and_then, etc.

Public items¶

Name	Kind	Description
and_then	fn	Chains a fallible step: Some(v) -> f(v), None stays None.
default	fn	Unwraps with a fallback value for None.
default_with	fn	Unwraps with a lazily computed fallback for None.
filter	fn	Keeps Some(v) only when the predicate holds.
flatten	fn	Collapses Option> one level.
is_none	fn	True for None.
is_some	fn	True for Some.
iter	fn	Zero-or-one element sequence view.
map	fn	Transforms the Some payload, None stays None.
or	fn	First Some of self and the alternative.
or_else	fn	First Some of self and a lazily built alternative.
zip	fn	Pairs two Somes into Some((a, b)).