[PATCH] Add noexcept to various basic_string string operations

[Jonathan Wakely]

On 06/12/16 05:55 -0500, Tim Song wrote:
>On Tue, Dec 6, 2016 at 5:43 AM, Jonathan Wakely <jwakely@redhat.com> wrote:
>> None of these functions can throw, so we should mark them as such.
>> I've reported this as a defect against C++17, because they should have
>> been made noexcept after the application of https://wg21.link/p0254r2
>
>Surely the const _CharT* variants are narrow contract? Or was there a
>policy change here?

That's a guideline for the standard, not for implementations. In
libstdc++ we don't use exceptions for precondition violations anyway,
We abort() in Debug Mode for some conditions, but don't throw.

It has always been our policy to strengthen the noexcept guarantee on
functions that can't throw, there is no change.