value_ref::value_ref
Constructors.
Synopsis
value_ref(
value_ref const&); (1)
value_ref(
value_ref&&); (2)
value_ref(
string_view s) noexcept; (3)
template<
class T>
value_ref(
T const& t) noexcept; (4)
template<
class T>
value_ref(
T&& t) noexcept; (5)
value_ref(
bool b) noexcept; (6)
value_ref(
signed char t) noexcept; (7)
value_ref(
short t) noexcept; (8)
value_ref(
int t) noexcept; (9)
value_ref(
long t) noexcept; (10)
value_ref(
long long t) noexcept; (11)
value_ref(
unsigned char t) noexcept; (12)
value_ref(
unsigned short t) noexcept; (13)
value_ref(
unsigned int t) noexcept; (14)
value_ref(
unsigned long t) noexcept; (15)
value_ref(
unsigned long long t) noexcept; (16)
value_ref(
float t) noexcept; (17)
value_ref(
double t) noexcept; (18)
value_ref(
std::nullptr_t) noexcept; (19)
value_ref(
std::initializer_list< value_ref > init) noexcept; (20)Description
-
(1) copy constructor.
-
(2) move constructor.
-
(3) the constructed value stores a reference to
t's character array. -
(4) the constructed value stores a
constreference tot. -
(5) the constructed value stores an rvalue reference to
t. -
(6) the constructed value stores a copy of
b. -
(7)–(18) the constructed value stores a copy of
t. -
(19) the constrcuted value stores
nullptr. -
(20) the constrcuted value stores a copy of
init.
In addition the constructed object stores a pointer to a function that captures the type information necessary to construct a value from the stored data.
|
The overloads that accept references do not take ownership of referenced objects. The caller is responsible for making sure those objects do not go out of scope before the |
Complexity
-
(1)–(19) constant.
-
(20) linear in
init.size().
Exception Safety
No-throw guarantee.