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[allocator.requirements.general] Add namespace std for exposition-only concept #8327

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[allocator.requirements.general] Add namespace std for exposition-only concept #8327

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18 changes: 10 additions & 8 deletions source/lib-intro.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -2958,14 +2958,16 @@
The following exposition-only concept defines
the minimal requirements on an Allocator type.
\begin{codeblock}
template<class Alloc>
concept @\defexposconcept{simple-allocator}@ =
requires(Alloc alloc, size_t n) {
{ *alloc.allocate(n) } -> @\libconcept{same_as}@<typename Alloc::value_type&>;
{ alloc.deallocate(alloc.allocate(n), n) };
} &&
@\libconcept{copy_constructible}@<Alloc> &&
@\libconcept{equality_comparable}@<Alloc>;
namespace std {
template<class Alloc>
concept @\defexposconcept{simple-allocator}@ =
requires(Alloc alloc, size_t n) {
{ *alloc.allocate(n) } -> @\libconcept{same_as}@<typename Alloc::value_type&>;
{ alloc.deallocate(alloc.allocate(n), n) };
} &&
@\libconcept{copy_constructible}@<Alloc> &&
@\libconcept{equality_comparable}@<Alloc>;
}
\end{codeblock}
A type \tcode{Alloc} models \exposconcept{simple-allocator}
if it meets the requirements of \ref{allocator.requirements.general}.
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