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### 2883. The standard library should provide `string_view` parameters instead or in addition for functions defined with `char const *` or `string const &` as parameter types.

Section: 21.4 [string.view] Status: LEWG Submitter: Switzerland Opened: 2017-02-03 Last modified: 2017-07-16

Priority: Not Prioritized

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Discussion:

Addresses CH 9

The standard library should provide `string_view` parameters instead or in addition for functions defined with `char const *` or `string const &` as parameter types. Most notably in cases where both such overloads exist or where an internal copy is expected anyway.

It might be doubted that the non-null termination of `string_view` could be an issue with functions that pass the `char *` down to OS functions, such as `fstream_buf::open()` etc. and those shouldn't provide it and favour generating a `std::string` temporary instead in that case. However, `std::path` demonstrates it is usable to have `string_view` overloads and there might be many places where it can be handy, or even better.

Proposed change: Provide the overloads for `std::regex`, the exception classes, `std::bitset`, `std::locale` and more.

[Post-Kona 2017]

Most (all?) of these changes were proposed in P0506r1, which was discussed by LEWG in Kona.

[2017-07 Toronto Thurs Issue Prioritization]

Status LEWG - they're already looking at this.

Proposed resolution: