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US091 11.10.01 p04.1 Strong structural equality for enums #90

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wg21bot opened this issue Oct 23, 2019 · 3 comments
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US091 11.10.01 p04.1 Strong structural equality for enums #90

wg21bot opened this issue Oct 23, 2019 · 3 comments
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EWG Evolution rejected No consensus for a change.
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CD C++20

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@wg21bot
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wg21bot commented Oct 23, 2019

A user-defined operator<=> can affect whether an enumeration type has strong structural equality.

Proposed change:
Specify that all enumeration types have that property.
@wg21bot wg21bot added the EWG Evolution label Oct 23, 2019
@wg21bot wg21bot mentioned this issue Oct 23, 2019
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@jfbastien
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jfbastien commented Oct 27, 2019 •
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From #112 (which I closed as duplicate):

The == operator is inappropriate for comparing non-type template arguments of enumeration type, since it may be overloaded for them.

Proposed change:
Compare the values of the underlying type.

@jfbastien
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jfbastien commented Nov 4, 2019 •
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EWG Monday: http://wiki.edg.com/bin/view/Wg21belfast/US091

Does EWG want to consider this for C++20

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No consensus for change.

This was referenced Nov 6, 2019
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@jensmaurer
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Rejected. There was no consensus to adopt this change.

@jensmaurer jensmaurer added the rejected No consensus for a change. label Nov 7, 2019
@jensmaurer jensmaurer added this to the CD C++20 milestone Sep 5, 2020
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