23 lines
962 B
Markdown
23 lines
962 B
Markdown
[constexpr.functions]
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# 16 Library introduction [[library]](./#library)
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## 16.4 Library-wide requirements [[requirements]](requirements#constexpr.functions)
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### 16.4.6 Conforming implementations [[conforming]](conforming#constexpr.functions)
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#### 16.4.6.7 Constexpr functions and constructors [constexpr.functions]
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/lib-intro.tex#L3732)
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This document explicitly requires that certain standard library functions areconstexpr ([[dcl.constexpr]](dcl.constexpr "9.2.6 The constexpr and consteval specifiers"))[.](#1.sentence-1)
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An implementation shall not declare
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any standard library function signature as constexpr except for those where
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it is explicitly required[.](#1.sentence-2)
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Within any header that provides any non-defining declarations of constexpr
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functions or constructors an implementation shall provide corresponding definitions[.](#1.sentence-3)
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