Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F77910098
aka_transform_iterator.hh
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Sat, Aug 17, 03:49
Size
5 KB
Mime Type
text/x-c++
Expires
Mon, Aug 19, 03:49 (2 d)
Engine
blob
Format
Raw Data
Handle
19890983
Attached To
rAKA akantu
aka_transform_iterator.hh
View Options
/**
* @file aka_transform_iterator.hh
*
* @author Nicolas Richart
*
* @date creation jeu déc 12 2019
*
* @brief transform adaptors
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* akantu-iterators is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* akantu-iterators is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with akantu-iterators. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_compatibilty_with_cpp_standard.hh"
/* -------------------------------------------------------------------------- */
#include <utility>
/* -------------------------------------------------------------------------- */
#ifndef AKA_TRANSFORM_ITERATOR_H
#define AKA_TRANSFORM_ITERATOR_H
#ifndef AKANTU_ITERATORS_NAMESPACE
#define AKANTU_ITERATORS_NAMESPACE akantu
#endif
namespace
AKANTU_ITERATORS_NAMESPACE
{
namespace
iterators
{
template
<
class
iterator_t
,
class
operator_t
>
class
transform_adaptor_iterator
{
public
:
using
value_type
=
decltype
(
std
::
declval
<
operator_t
>
()(
std
::
declval
<
typename
iterator_t
::
value_type
>
()));
using
difference_type
=
typename
iterator_t
::
difference_type
;
using
pointer
=
std
::
decay_t
<
value_type
>
*
;
using
reference
=
value_type
&
;
using
iterator_category
=
typename
iterator_t
::
iterator_category
;
transform_adaptor_iterator
(
iterator_t
it
,
operator_t
op
)
:
it
(
std
::
move
(
it
)),
op
(
op
)
{}
transform_adaptor_iterator
(
const
transform_adaptor_iterator
&
)
=
default
;
transform_adaptor_iterator
&
operator
++
()
{
++
it
;
return
*
this
;
}
decltype
(
auto
)
operator
*
()
{
return
op
(
std
::
forward
<
decltype
(
*
it
)
>
(
*
it
));
}
bool
operator
==
(
const
transform_adaptor_iterator
&
other
)
const
{
return
(
it
==
other
.
it
);
}
bool
operator
!=
(
const
transform_adaptor_iterator
&
other
)
const
{
return
not
operator
==
(
other
);
}
template
<
class
iterator_category_
=
iterator_category
,
std
::
enable_if_t
<
aka
::
is_iterator_category_at_least
<
iterator_category_
,
std
::
random_access_iterator_tag
>::
value
>
*
=
nullptr
>
difference_type
operator
-
(
const
transform_adaptor_iterator
&
other
)
{
return
other
-
*
this
;
}
private
:
iterator_t
it
;
operator_t
op
;
};
template
<
class
iterator_t
,
class
operator_t
>
decltype
(
auto
)
make_transform_adaptor_iterator
(
iterator_t
it
,
operator_t
op
)
{
return
transform_adaptor_iterator
<
iterator_t
,
operator_t
>
(
it
,
std
::
forward
<
operator_t
>
(
op
));
}
}
// namespace iterators
namespace
containers
{
template
<
class
container_t
,
class
operator_t
>
class
TransformIteratorAdaptor
{
public
:
// using const_iterator = typename
// std::decay_t<container_t>::const_iterator; using iterator = typename
// std::decay_t<container_t>::iterator;
TransformIteratorAdaptor
(
container_t
&&
cont
,
operator_t
op
)
:
cont
(
std
::
forward
<
container_t
>
(
cont
)),
op
(
std
::
forward
<
operator_t
>
(
op
))
{}
decltype
(
auto
)
begin
()
const
{
return
iterators
::
make_transform_adaptor_iterator
(
cont
.
begin
(),
op
);
}
decltype
(
auto
)
begin
()
{
return
iterators
::
make_transform_adaptor_iterator
(
cont
.
begin
(),
op
);
}
decltype
(
auto
)
end
()
const
{
return
iterators
::
make_transform_adaptor_iterator
(
cont
.
end
(),
op
);
}
decltype
(
auto
)
end
()
{
return
iterators
::
make_transform_adaptor_iterator
(
cont
.
end
(),
op
);
}
private
:
container_t
cont
;
operator_t
op
;
};
}
// namespace containers
template
<
class
container_t
,
class
operator_t
>
decltype
(
auto
)
make_transform_adaptor
(
container_t
&&
cont
,
operator_t
&&
op
)
{
return
containers
::
TransformIteratorAdaptor
<
container_t
,
operator_t
>
(
std
::
forward
<
container_t
>
(
cont
),
std
::
forward
<
operator_t
>
(
op
));
}
template
<
class
container_t
>
decltype
(
auto
)
make_keys_adaptor
(
container_t
&&
cont
)
{
return
make_transform_adaptor
(
std
::
forward
<
container_t
>
(
cont
),
[](
auto
&&
pair
)
->
const
auto
&
{
return
pair
.
first
;
});
}
template
<
class
container_t
>
decltype
(
auto
)
make_values_adaptor
(
container_t
&&
cont
)
{
return
make_transform_adaptor
(
std
::
forward
<
container_t
>
(
cont
),
[](
auto
&&
pair
)
->
auto
&
{
return
pair
.
second
;
});
}
template
<
class
container_t
>
decltype
(
auto
)
make_dereference_adaptor
(
container_t
&&
cont
)
{
return
make_transform_adaptor
(
std
::
forward
<
container_t
>
(
cont
),
[](
auto
&&
value
)
->
decltype
(
*
value
)
{
return
*
value
;
});
}
}
// namespace AKANTU_ITERATORS_NAMESPACE
#endif
// AKA_TRANSFORM_ITERATOR_H
Event Timeline
Log In to Comment