boostorg/optional
1
0
Fork 1
mirror of https://github.com/boostorg/optional.git synced 2025-07-30 04:27:19 +02:00
Code Issues Packages Projects Releases Wiki Activity

documented in-place constructors

Browse Source
This commit is contained in:
Andrzej Krzemienski
2016-10-28 00:01:13 +02:00
parent 9af24038bc
commit 4a9d53539c
13 changed files with 407 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
doc/27_ref_optional_synopsis.qbk
View File

@ -15,6 +15,12 @@
namespace boost {
class in_place_init_t { /* see below */ } ; ``[link reference_in_place_init __GO_TO__]``
const in_place_init_t in_place_init ( /* see below */ ) ;
class in_place_init_if_t { /*see below*/ } ; ``[link reference_in_place_init_if __GO_TO__]``
const in_place_init_if_t in_place_init_if ( /*see below*/ ) ;
template <class T>
class optional ; ``[link reference_operator_template __GO_TO__]``
@ -67,6 +73,26 @@
[endsect]
[section:header_optional_in_place_init Initialization tags]
[#reference_in_place_init]
[#reference_in_place_init_if]
namespace boost {
class in_place_init_t { /* see below */ } ;
const in_place_init_t in_place_init ( /* see below */ ) ;
class in_place_init_if_t { /*see below*/ } ;
const in_place_init_if_t in_place_init_if ( /*see below*/ ) ;
}
Classes `in_place_init_t` and `in_place_init_if_t` are empty clsses. Their purpose is to control overload resolution in the initialization of optional objects.
They are empty, trivially copyable classes with disabled default constructor.
[endsect]
[section:header_optional_optional_values Optional Values]
[#reference_operator_template]
@ -91,7 +117,6 @@
optional ( T&& v ) ; ``[link reference_optional_constructor_move_value __GO_TO__]``
// [new in 1.34]
optional ( bool condition, T const& v ) ; ``[link reference_optional_constructor_bool_value __GO_TO__]``
optional ( optional const& rhs ) ; ``[link reference_optional_constructor_optional __GO_TO__]``
@ -101,6 +126,10 @@
template<class U> explicit optional ( optional<U> const& rhs ) ; ``[link reference_optional_constructor_other_optional __GO_TO__]``
template<class U> explicit optional ( optional<U>&& rhs ) ; ``[link reference_optional_move_constructor_other_optional __GO_TO__]``
template<class... Args> explicit optional ( in_place_init_t, Args&&... args ) ; ``[link reference_optional_in_place_init __GO_TO__]``
template<class... Args> explicit optional ( in_place_init_if_t, bool condition, Args&&... args ) ; ``[link reference_optional_in_place_init_if __GO_TO__]``
template<class InPlaceFactory> explicit optional ( InPlaceFactory const& f ) ; ``[link reference_optional_constructor_factory __GO_TO__]``