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[flat.multimap] Apply "constexpr" to flat_multimap::operator=(initializer_list) - #9277

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jensmaurer merged 1 commit into
cplusplus:mainfrom
Quuxplusone:fmconstexpr.topic
Aug 28, 2026
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[flat.multimap] Apply "constexpr" to flat_multimap::operator=(initializer_list)#9277
jensmaurer merged 1 commit into
cplusplus:mainfrom
Quuxplusone:fmconstexpr.topic

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@Quuxplusone

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"constexpr" was applied to flat_map::operator=(initializer_list) in commit e1502d2 "P3372R3 constexpr containers and adaptors," but it was missed here. I don't believe this was intentional.

Apologies if there's already an LWG issue for this.

…izer_list)

"constexpr" was applied to flat_map::operator=(initializer_list)
in commit e1502d2 "P3372R3 constexpr containers and adaptors,"
but it was missed here. I don't believe this was intentional.
@frederick-vs-ja

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Apologies if there's already an LWG issue for this.

Luckily there's no yet LWG issue for this. I just verified that the constexpr for flat_multimap& operator=(initializer_list<value_type>) is already in https://wg21.link/p3372r3#flat.multimap.defn, so missing constexpr is merely due to misapplication of the paper.

@jensmaurer
jensmaurer merged commit e4676fa into cplusplus:main Aug 28, 2026
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3 participants