tmp/tmpz4oj534g/{from.md → to.md}
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| 1 |
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#### Class template `transform_view::sentinel` <a id="range.transform.sentinel">[[range.transform.sentinel]]</a>
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``` cpp
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namespace std::ranges {
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template<input_range V, copy_constructible F>
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requires view<V> && is_object_v<F> &&
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regular_invocable<F&, range_reference_t<V>> &&
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can-reference<invoke_result_t<F&, range_reference_t<V>>>
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template<bool Const>
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class transform_view<V, F>::sentinel {
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private:
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using Parent = // exposition only
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conditional_t<Const, const transform_view, transform_view>;
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using Base = conditional_t<Const, const V, V>; // exposition only
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sentinel_t<Base> end_ = sentinel_t<Base>(); // exposition only
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public:
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sentinel() = default;
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constexpr explicit sentinel(sentinel_t<Base> end);
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constexpr sentinel(sentinel<!Const> i)
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requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
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constexpr sentinel_t<Base> base() const;
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friend constexpr bool operator==(const iterator<Const>& x, const sentinel& y);
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friend constexpr range_difference_t<Base>
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operator-(const iterator<Const>& x, const sentinel& y)
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requires sized_sentinel_for<sentinel_t<Base>, iterator_t<Base>>;
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friend constexpr range_difference_t<Base>
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operator-(const sentinel& y, const iterator<Const>& x)
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requires sized_sentinel_for<sentinel_t<Base>, iterator_t<Base>>;
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};
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}
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```
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``` cpp
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constexpr explicit sentinel(sentinel_t<Base> end);
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```
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*Effects:* Initializes *end\_* with `end`.
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``` cpp
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constexpr sentinel(sentinel<!Const> i)
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requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>;
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```
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*Effects:* Initializes *end\_* with `std::move(i.`*`end_`*`)`.
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``` cpp
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constexpr sentinel_t<Base> base() const;
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```
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*Effects:* Equivalent to: `return `*`end_`*`;`
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``` cpp
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friend constexpr bool operator==(const iterator<Const>& x, const sentinel& y);
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```
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*Effects:* Equivalent to: `return x.`*`current_`*` == y.`*`end_`*`;`
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``` cpp
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friend constexpr range_difference_t<Base>
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operator-(const iterator<Const>& x, const sentinel& y)
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requires sized_sentinel_for<sentinel_t<Base>, iterator_t<Base>>;
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```
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*Effects:* Equivalent to: `return x.`*`current_`*` - y.`*`end_`*`;`
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``` cpp
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friend constexpr range_difference_t<Base>
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operator-(const sentinel& y, const iterator<Const>& x)
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requires sized_sentinel_for<sentinel_t<Base>, iterator_t<Base>>;
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```
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*Effects:* Equivalent to: `return y.`*`end_`*` - x.`*`current_`*`;`
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