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mln/value/internal/convert.hh
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// Copyright (C) 2007, 2008, 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_VALUE_INTERNAL_CONVERT_HH
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# define MLN_VALUE_INTERNAL_CONVERT_HH
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# include <mln/core/contract.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
value
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{
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namespace
internal
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{
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template
<
typename
T>
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struct
convert_
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{
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// FIXME: Check that we have a type T compatible with 'int'.
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static
T
value_at_index
(
unsigned
i);
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static
unsigned
index_of_value
(
const
T
& v);
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};
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template
<>
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struct
convert_
<
bool
>
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{
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static
bool
value_at_index
(
unsigned
i);
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static
unsigned
index_of_value
(
bool
v);
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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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convert_<T>::value_at_index
(
unsigned
i)
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{
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return
T
(
int
(mln_min(
T
)) +
int
(i) );
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}
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template
<
typename
T>
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inline
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unsigned
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convert_<T>::index_of_value
(
const
T
& v)
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{
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return
unsigned
(
int
(v) -
int
(mln_min(
T
)) );
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}
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// Case of 'bool'.
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inline
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bool
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convert_<bool>::value_at_index
(
unsigned
i)
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{
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mln_precondition(i < 2);
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return
i == 1 ?
true
:
false
;
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}
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inline
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unsigned
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convert_<bool>::index_of_value
(
bool
v)
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{
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return
v ? 1 : 0;
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}
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# endif // ! MLN_INCLUDE_ONLY
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}
// end of namespace mln::value::internal
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}
// end of namespace mln::value
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}
// end of namespace mln
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#endif // ! MLN_VALUE_INTERNAL_CONVERT_HH
mln
value
internal
convert.hh
Copyright (C) 2012 EPITA Research and Development Laboratory (LRDE)