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[structure.specification] p3 add note for "Mandates" item #2382

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jensmaurer opened this issue Nov 6, 2018 · 2 comments · May be fixed by #2537
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[structure.specification] p3 add note for "Mandates" item #2382

jensmaurer opened this issue Nov 6, 2018 · 2 comments · May be fixed by #2537
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Saying that it is expressly unspecified whether the "ill-formedness" is in the immediate context or not, i.e. is SFINAE-able or not.
@jensmaurer jensmaurer linked a pull request Nov 27, 2018 that will close this issue
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@jensmaurer jensmaurer self-assigned this Nov 27, 2018
@jensmaurer jensmaurer added the lwg Issue must be reviewed by LWG. label Jan 27, 2019
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Sent e-mail to LWG reflector.

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jensmaurer commented Mar 1, 2019 •
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LWG clarified in its 2019-03-01 teleconference that "Mandates" just means there is a required diagnostic for violating the rule. In some cases, this can also be achieved by SFINAE yielding an empty overload set, for example. Error messages are often better with static_assert, though.

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[structure.specifications] Clarify that 'Mandates' conditions may or … jensmaurer/draft
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