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Sprout/source/libs/string/basic_string/hash_value.rst

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.. _sprout-string-basic_string-hash_value:
###############################################################################
hash_value
###############################################################################
Interface
========================================
.. sourcecode:: c++
template<typename T, std::size_t N, typename Traits>
inline SPROUT_CONSTEXPR std::size_t
hash_value(sprout::basic_string<T, N, Traits> const& v);
Returns
========================================
| Equivalent to ``sprout::hash_range(v)``.
Notes
========================================
| ``sprout::to_hash(v)`` is a valid call, because ``hash_value(v)`` ADL callable is defined.
Examples
========================================
.. sourcecode:: c++
#include <sprout/string.hpp>
using namespace sprout;
using type = string<8>;
SPROUT_STATIC_CONSTEXPR auto input = type("homuhomu");
SPROUT_STATIC_CONSTEXPR auto h = sprout::to_hash(input);
static_assert(h, "hash value generated from string.");
Complexity
========================================
| linear in N.
| Recursive function invocations in *O(logN)* (logarithmic) depth.
Header
========================================
| ``sprout/string/hash.hpp``
| Convenience header: ``sprout/string.hpp``