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User documentation 2.1
An Image Processing Platform
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value_at_index.hh
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// Copyright (C) 2009 EPITA Research and Development Laboratory (LRDE)
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//
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// This file is part of Olena.
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//
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// Olena is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation, version 2 of the License.
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//
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// Olena is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Olena. If not, see <http://www.gnu.org/licenses/>.
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//
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// As a special exception, you may use this file as part of a free
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// software project without restriction. Specifically, if other files
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// instantiate templates or use macros or inline functions from this
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// file, or you compile this file and link it with other files to produce
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// an executable, this file does not by itself cause the resulting
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// executable to be covered by the GNU General Public License. This
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// exception does not however invalidate any other reasons why the
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// executable file might be covered by the GNU General Public License.
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#ifndef MLN_FUN_I2V_VALUE_AT_INDEX_HH
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# define MLN_FUN_I2V_VALUE_AT_INDEX_HH
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# include <mln/core/concept/function.hh>
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# include <mln/trait/value_.hh>
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namespace
mln
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{
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namespace
fun
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{
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namespace
i2v
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{
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template
<
typename
T>
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struct
value_at_index
:
Function_v2v
< value_at_index<T> >,
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private
metal::bool_<(mln_dim(T) == 1)>::check_t
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{
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typedef
T
result
;
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T
operator()
(
unsigned
i)
const
;
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};
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template
<>
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struct
value_at_index
<
bool
> :
Function_v2v
< value_at_index<bool> >
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{
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typedef
bool
result
;
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bool
operator()
(
unsigned
i)
const
;
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};
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# ifndef MLN_INCLUDE_ONLY
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template
<
typename
T>
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inline
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T
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value_at_index<T>::operator()
(
unsigned
i)
const
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{
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return
T
(
int
(mln_min(
T
)) +
int
(i) );
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}
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inline
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bool
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value_at_index<bool>::operator()
(
unsigned
i)
const
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{
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mln_precondition(i < 2);
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return
i == 1u ?
true
:
false
;
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}
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# endif // ! MLN_INCLUDE_ONLY
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}
// end of namespace mln::fun::i2v
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}
// end of namespace mln::fun
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}
// end of namespace mln
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#endif // ! MLN_FUN_I2V_VALUE_AT_INDEX_HH
mln
fun
i2v
value_at_index.hh
Copyright (C) 2012 EPITA Research and Development Laboratory (LRDE)