mirror of
https://github.com/bolero-MURAKAMI/Sprout
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40 lines
1.1 KiB
ReStructuredText
40 lines
1.1 KiB
ReStructuredText
.. _sprout-string-char_traits-length-iterator:
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###############################################################################
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length
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###############################################################################
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Interface
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========================================
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.. sourcecode:: c++
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR std::size_t length(ConstInputIterator s);
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Returns
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========================================
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| The smallest i such that ``eq(s[i], char_type())`` is true.
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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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using namespace sprout;
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SPROUT_STATIC_CONSTEXPR auto x = string<8>("homuhomu");
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SPROUT_STATIC_CONSTEXPR auto result = char_traits<char>::length(x.begin());
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static_assert(result == 8, "length of x is 8.");
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Complexity
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========================================
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| linear.
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| Recursive function invocations in *O(logN)* (logarithmic) depth.
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Header
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========================================
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| ``sprout/string/char_traits.hpp``
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| Convenience header: ``sprout/string.hpp``
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