make_optional overloads
Declared in <bslstl_optional.h>
Return an optional object containing a value-initialized t_TYPE object.
template<class t_TYPE>
constexpr
bsl::optional<t_TYPE>
make_optional();Return an optional containing a value constructed from the arguments.
template<class t_TYPE>
constexpr
bsl::optional<bsl::decay<t_TYPE>::type>
make_optional(t_TYPE&& rhs);Return an optional containing a value constructed from the arguments.
template<
class t_TYPE,
class t_INIT_LIST_TYPE,
class... t_ARGS>
constexpr
bsl::optional<t_TYPE>
make_optional(
std::initializer_list<t_INIT_LIST_TYPE> il,
t_ARGS&&... args);Return an optional containing a value constructed from the arguments.
template<
class t_TYPE,
class t_ARG,
class... t_ARGS>
constexpr
optional<t_TYPE>
make_optional(
t_ARG&& arg,
t_ARGS&&... args);Return an optional containing a value constructed from the arguments.
template<class t_TYPE>
bsl::optional<bsl::decay<t_TYPE>::type>
make_optional(
std::allocator_arg_t allocatorArg,
bsl::optional<bsl::decay<t_TYPE>::type>::allocator_type const& alloc,
t_TYPE&& rhs);Return an optional containing a value constructed from the arguments.
template<
class t_TYPE,
class... t_ARGS>
bsl::optional<t_TYPE>
make_optional(
std::allocator_arg_t allocatorArg,
bsl::optional<t_TYPE>::allocator_type const& alloc,
t_ARGS&&... args);Return an optional containing a value constructed from the arguments.
template<
class t_TYPE,
class t_INIT_LIST_TYPE,
class... t_ARGS>
bsl::optional<t_TYPE>
make_optional(
std::allocator_arg_t allocatorArg,
bsl::optional<t_TYPE>::allocator_type const& alloc,
std::initializer_list<t_INIT_LIST_TYPE> il,
t_ARGS&&... args);optional containing a value-initialized t_TYPEoptional containing a t_TYPE constructed from rhsoptional containing a t_TYPE constructed from il and argsoptional containing a t_TYPE constructed from the argumentsoptional containing a t_TYPE constructed from args| Name | Description |
|---|---|
| rhs | right-hand operand |
| il | initializer list forwarded to construct the contained value |
| args | arguments forwarded to construct the contained value |
| arg | argument forwarded to construct the contained value |
| allocatorArg | tag selecting the allocator-extended constructor |
| alloc | allocator used to supply memory for the optional |