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Sprout/source/libs/string/basic_string/front.rst
2013-09-06 16:46:03 +09:00

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.. _sprout-string-basic_string-front:
###############################################################################
front
###############################################################################
Interface
========================================
.. sourcecode:: c++
reference front();
SPROUT_CONSTEXPR const_reference front() const;
Returns
========================================
| A reference to the first element in the string.
Examples
========================================
.. sourcecode:: c++
#include <sprout/string.hpp>
using namespace sprout;
SPROUT_STATIC_CONSTEXPR auto input = string<8>("homuhomu");
static_assert(input.front() == 'h', "a first element is h.");
Complexity
========================================
| Recursive function invocations in *O(1)* (constant) depth.
Header
========================================
| ``sprout/string/string.hpp``
| Convenience header: ``sprout/string.hpp``