mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
46 lines
1.2 KiB
ReStructuredText
46 lines
1.2 KiB
ReStructuredText
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.. _sprout-string-basic_string-std-tuple_element:
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###############################################################################
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std::tuple_element
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###############################################################################
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Interface
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========================================
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.. sourcecode:: c++
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namespace std {
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template<std::size_t I, typename T, std::size_t N, typename Traits>
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struct tuple_element<I, sprout::basic_string<T, N, Traits> >;
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}
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// syntax
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std::tuple_element<I, basic_string<T, N, Traits> >::type
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Requires
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========================================
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| ``I < N``. The program is ill-formed if I is out of bounds.
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Value
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========================================
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| The type T.
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Examples
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========================================
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.. sourcecode:: c++
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#include <sprout/string.hpp>
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#include <type_traits>
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using namespace sprout;
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using type = string<8>;
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using element_type = std::tuple_element<0, type>::type;
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static_assert(std::is_same<element_type, char>::value, "tuple element type of string is char.");
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Header
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========================================
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| ``sprout/string/tuple.hpp``
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| Convenience header: ``sprout/string.hpp``
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