tmp/tmp563wdm5i/{from.md → to.md}
RENAMED
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@@ -2,17 +2,17 @@
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``` cpp
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template<class T> struct tuple_size;
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```
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-
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requirements [[meta.rqmts]] with a base
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`integral_constant<size_t, N>` for some `N`.
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``` cpp
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template<class... Types>
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-
struct tuple_size<tuple<Types...>> :
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```
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``` cpp
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template<size_t I, class... Types>
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struct tuple_element<I, tuple<Types...>> {
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@@ -20,12 +20,12 @@ template<size_t I, class... Types>
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};
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```
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*Mandates:* `I` < `sizeof...(Types)`.
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-
*
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is zero-based.
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``` cpp
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template<class T> struct tuple_size<const T>;
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```
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@@ -60,11 +60,11 @@ template<size_t I, class T> struct tuple_element<I, const T>;
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```
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Let `TE` denote `tuple_element_t<I, T>` of the cv-unqualified type `T`.
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Then each specialization of the template meets the
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*Cpp17TransformationTrait* requirements [[meta.rqmts]] with a member
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typedef `type` that names the type `
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In addition to being available via inclusion of the `<tuple>` header,
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the template is available when any of the headers `<array>`, `<ranges>`,
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or `<utility>` are included.
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``` cpp
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template<class T> struct tuple_size;
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```
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+
Except where specified otherwise, all specializations of `tuple_size`
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meet the *Cpp17UnaryTypeTrait* requirements [[meta.rqmts]] with a base
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characteristic of `integral_constant<size_t, N>` for some `N`.
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``` cpp
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template<class... Types>
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+
struct tuple_size<tuple<Types...>> : integral_constant<size_t, sizeof...(Types)> { };
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```
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``` cpp
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template<size_t I, class... Types>
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struct tuple_element<I, tuple<Types...>> {
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};
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```
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*Mandates:* `I` < `sizeof...(Types)`.
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+
*Result:* `TI` is the type of the `I`ᵗʰ element of `Types`, where
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indexing is zero-based.
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``` cpp
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template<class T> struct tuple_size<const T>;
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```
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```
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Let `TE` denote `tuple_element_t<I, T>` of the cv-unqualified type `T`.
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Then each specialization of the template meets the
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*Cpp17TransformationTrait* requirements [[meta.rqmts]] with a member
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+
typedef `type` that names the type `const TE`.
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In addition to being available via inclusion of the `<tuple>` header,
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the template is available when any of the headers `<array>`, `<ranges>`,
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or `<utility>` are included.
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