success_type<T> - Boost.Outcome documentation

# `success_type<T>`

Type sugar for constructing a successful result or outcome. Generally not constructed directly, but via the free function `success(T &&)` . Detectable using `is_success_type<T>` .

This is a regular wrapper type, with defaulted default, copy and move constructor, defaulted assignment, and defaulted destructor.

A member type alias `value_type` indicates `T`.

There is an explicit initialising constructor taking any type `U` which is not a `success_type<T>`, and which will forward construct the contained `T` from that `U`.

There is a `.value()` reference observer with the usual constexpr lvalue, const lvalue, rvalue and const rvalue overloads.

There is a specialisation `success_type<void>` which stores nothing and provides no `.value()` observers.

Requires: Nothing.

Namespace: `BOOST_OUTCOME_V2_NAMESPACE`

Header: `<boost/outcome/success_failure.hpp>`

Last revised: January 21, 2019 at 18:00:41 UTC