From Jason Turner

[valarray.range]

C++17 → C++20 1.9 KB 23 lines
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Archived: C++17 | C++20
Markdown: C++17 | C++20
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  ### `valarray` range access <a id="valarray.range">[[valarray.range]]</a>
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  In the `begin` and `end` function templates that follow, *unspecified*1
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- is a type that meets the requirements of a mutable random access
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- iterator ([[random.access.iterators]]) and of a contiguous iterator (
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- [[iterator.requirements.general]]) whose `value_type` is the template
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- parameter `T` and whose `reference` type is `T&`. *unspecified*2 is a
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- type that meets the requirements of a constant random access iterator (
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- [[random.access.iterators]]) and of a contiguous iterator (
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- [[iterator.requirements.general]]) whose `value_type` is the template
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- parameter `T` and whose `reference` type is `const T&`.
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  The iterators returned by `begin` and `end` for an array are guaranteed
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- to be valid until the member function `resize(size_t, T)` (
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- [[valarray.members]]) is called for that array or until the lifetime of
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  that array ends, whichever happens first.
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  ``` cpp
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  template<class T> unspecified{1} begin(valarray<T>& v);
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  template<class T> unspecified{2} begin(const valarray<T>& v);
 
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  ### `valarray` range access <a id="valarray.range">[[valarray.range]]</a>
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  In the `begin` and `end` function templates that follow, *unspecified*1
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+ is a type that meets the requirements of a mutable
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+ *Cpp17RandomAccessIterator* [[random.access.iterators]] and models
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+ `contiguous_iterator` [[iterator.concept.contiguous]], whose
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+ `value_type` is the template parameter `T` and whose `reference` type is
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+ `T&`. *unspecified*2 is a type that meets the requirements of a constant
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+ *Cpp17RandomAccessIterator* and models `contiguous_iterator`, whose
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+ `value_type` is the template parameter `T` and whose `reference` type is
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+ `const T&`.
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  The iterators returned by `begin` and `end` for an array are guaranteed
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+ to be valid until the member function `resize(size_t, T)`
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+ [[valarray.members]] is called for that array or until the lifetime of
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  that array ends, whichever happens first.
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  ``` cpp
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  template<class T> unspecified{1} begin(valarray<T>& v);
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  template<class T> unspecified{2} begin(const valarray<T>& v);