std::ranges::transform_view<V,F>::iterator
From cppreference.com
< cpp | ranges | transform view
|
template
<
bool Const >
class /*iterator*/ |
(since C++20)
(exposition only*) |
|
The return type of transform_view::begin, and of transform_view::end when the underlying view is a common_range
The type /*iterator*/<true> is returned by the const-qualified overloads. The type /*iterator*/<false>
Member types
| Member type | Definition |
Parent (private)
|
maybe-const
<Const, ranges::transform_view
<V, F>>
(exposition-only member type* |
Base (private)
|
maybe-const <Const, V>
(exposition-only member type* |
iterator_concept
|
|
iterator_category(present only if Base modelsforward_range)
|
Let MCF be maybe-const <Const, F>.
Otherwise, let
|
value_type
|
std::remove_cvref_t
<
std::invoke_result_t
<MCF&, ranges::range_reference_t
<Base>>>
, where MCF denotes maybe-const <Const, F>
|
difference_type
|
ranges::range_difference_t<Base> |
Data members
| Member name | Definition |
current_ (private)
|
An iterator into (possibly const-qualified) V.(exposition-only member object* |
parent_ (private)
|
A pointer to parent transform_view.(exposition-only member object* |
Member functions
| constructs an iterator (public member function) |
|
| returns the underlying iterator (public member function) |
|
| accesses the transformed element (public member function) |
|
| accesses an element by index (public member function) |
|
| advances or decrements the underlying iterator (public member function) |
Non-member functions
| compares the underlying iterators (function) |
|
|
(C++20)
|
performs iterator arithmetic (function) |
|
(C++20)
|
obtains an rvalue reference to the transformed element (function) |
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2259R1 | C++20 | member iterator_category is always defined
|
defined only if Base models forward_range
|
| LWG 3555 | C++20 | the definition of iterator_concept ignores const
|
made to consider |
| LWG 3798 | C++20 | iterator_category is input-only if transformation result is rvalue reference
|
may have a stronger category |