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### 2780. `basic_string_view::copy` is missing `constexpr`

Section: 21.4 [string.view] Status: Resolved Submitter: Billy Robert O'Neal III Opened: 2016-10-07 Last modified: 2018-11-25

Priority: 2

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Discussion:

Now that we have C++14 relaxed `constexpr`, we can also take care of the assignment operator and `copy`.

[Issues processing Telecon 2016-10-07]

Split off from 2778

[2016-11-12, Issaquah]

Sat PM: Status LEWG

[LEWG Kona 2017]

Recommend NAD: Don't want to spend the committee time. Can call std::copy if you want this, after LEWG159 goes into C++20.

[2018-06 Rapperswil Wednesday issues processing]

This will be addressed by P1032.

Resolved by the adoption of P1032 in San Diego.

Proposed resolution:

This wording is relative to N4606.

1. In 21.4.3 [string.view.template], add `constexpr` to `copy`:

   >     constexpr size_type copy(charT* s, size_type n, size_type pos = 0) const;

2. In 21.4.3.7 [string.view.ops], add `constexpr` to `copy`:

   >     constexpr size_type copy(charT* s, size_type n, size_type pos = 0) const;