tmp/tmps7hb1781/{from.md → to.md}
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| 1 |
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#### Iterator support <a id="string.view.iterators">[[string.view.iterators]]</a>
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``` cpp
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using const_iterator = implementation-defined // type of basic_string_view::const_iterator;
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```
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A type that meets the requirements of a constant random access
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iterator ([[random.access.iterators]]) and of a contiguous
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iterator ([[iterator.requirements.general]]) whose `value_type` is the
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template parameter `charT`.
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For a `basic_string_view str`, any operation that invalidates a pointer
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in the range \[`str.data()`, `str.data() + str.size()`) invalidates
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pointers, iterators, and references returned from `str`’s methods.
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All requirements on container iterators ([[container.requirements]])
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apply to `basic_string_view::const_iterator` as well.
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``` cpp
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constexpr const_iterator begin() const noexcept;
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constexpr const_iterator cbegin() const noexcept;
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```
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*Returns:* An iterator such that
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- if `!empty()`, `&*begin() == data_`,
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- otherwise, an unspecified value such that \[`begin()`, `end()`) is a
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valid range.
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``` cpp
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constexpr const_iterator end() const noexcept;
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constexpr const_iterator cend() const noexcept;
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```
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*Returns:* `begin() + size()`.
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``` cpp
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constexpr const_reverse_iterator rbegin() const noexcept;
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constexpr const_reverse_iterator crbegin() const noexcept;
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```
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*Returns:* `const_reverse_iterator(end())`.
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``` cpp
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constexpr const_reverse_iterator rend() const noexcept;
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constexpr const_reverse_iterator crend() const noexcept;
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```
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*Returns:* `const_reverse_iterator(begin())`.
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