NoThrowForwardIt uninitialized_copy( InputIt first, InputIt last,
class NoThrowForwardIt >
NoThrowForwardIt uninitialized_copy( ExecutionPolicy&& policy,
ForwardIt first, ForwardIt last,
Copies elements from the range
[
first,
last)
to an uninitialized memory area beginning at
d_firstas if by
for (; first != last; ++d_first, (void) ++first)
::new (voidify
(*d_first))
typename std::iterator_traits<NoThrowForwardIt>::value_type(*first);
If an exception is thrown during the initialization, the objects already constructed are destroyed in an unspecified order.
2) Same as (1), but executed according to policy.
This overload participates in overload resolution only if all following conditions are satisfied:
If d_first +
[
â0â,
std::distance(first, last))
overlaps with [
first,
last)
, the behavior is undefined.
InputIt
must meet the requirements of LegacyInputIterator. -ForwardIt
must meet the requirements of LegacyForwardIterator. -NoThrowForwardIt
must meet the requirements of LegacyForwardIterator. -No increment, assignment, comparison, or indirection through valid instances of NoThrowForwardIt
may throw exceptions. Applying &* to a NoThrowForwardIt
value must yield a pointer to its value type.(until C++11) [edit] Return value
Iterator to the element past the last element copied.
[edit] ComplexityLinear in the distance between first and last.
[edit] ExceptionsThe overload with a template parameter named ExecutionPolicy
reports errors as follows:
ExecutionPolicy
is one of the standard policies, std::terminate is called. For any other ExecutionPolicy
, the behavior is implementation-defined.template<class InputIt, class NoThrowForwardIt> constexpr NoThrowForwardIt uninitialized_copy(InputIt first, InputIt last, NoThrowForwardIt d_first) { using T = typename std::iterator_traits<NoThrowForwardIt>::value_type; NoThrowForwardIt current = d_first; try { for (; first != last; ++first, (void) ++current) ::new (static_cast<void*>(std::addressof(*current))) T(*first); return current; } catch (...) { for (; d_first != current; ++d_first) d_first->~T(); throw; } }[edit] Example [edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior LWG 866 C++98 givenT
as the value type of NoThrowForwardIt
, if
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