Sprout/source/libs/sprout/array/array/empty.rst
2013-08-25 23:14:03 +09:00

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.. _sprout-array-array-empty:
###############################################################################
empty
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Interface
========================================
.. sourcecode:: c++
SPROUT_CONSTEXPR bool empty() const SPROUT_NOEXCEPT;
Returns
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| true if the array size is 0, false otherwise.
Examples
========================================
.. sourcecode:: c++
#include <sprout/array.hpp>
using namespace sprout;
SPROUT_STATIC_CONSTEXPR auto input = array<int, 0>{{}};
static_assert(input.empty() == 10, "input is empty.");
Complexity
========================================
| Recursive function invocations in *O(1)* (constant) depth.
Header
========================================
| ``sprout/array/array.hpp``
| Convenience header: ``sprout/array.hpp``