diff options
Diffstat (limited to 'src/common/include/gudhi/allocator.h')
-rw-r--r-- | src/common/include/gudhi/allocator.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/common/include/gudhi/allocator.h b/src/common/include/gudhi/allocator.h new file mode 100644 index 00000000..b7ccd180 --- /dev/null +++ b/src/common/include/gudhi/allocator.h @@ -0,0 +1,43 @@ +/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT. + * See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details. + * Author(s): Marc Glisse + * + * Copyright (C) 2015 Inria + * + * Modification(s): + * - YYYY/MM Author: Description of the modification + */ + +#ifndef ALLOCATOR_H_ +#define ALLOCATOR_H_ + +#include <memory> +#include <utility> + +namespace Gudhi { + +/** \private + * An allocator that can be used to build an uninitialized vector. + */ +template <class T, class Base = std::allocator<T>> +struct no_init_allocator : Base { + typedef std::allocator_traits<Base> Base_traits; + template <class U> struct rebind { + typedef no_init_allocator<U, typename Base_traits::template rebind_alloc<U>> other; + }; + + // Inherit constructors. + using Base::Base; + + // Do nothing: that's the whole point! + template<class P> + void construct(P*) noexcept {} + + template<class P, class...U> void construct(P*p, U&&...u) { + Base_traits::construct(*(Base*)this, p, std::forward<U>(u)...); + } +}; + +} // namespace Gudhi + +#endif // ALLOCATOR_H_ |