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literal.hh
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// Copyright (C) 2007, 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_CORE_CONCEPT_LITERAL_HH
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# define MLN_CORE_CONCEPT_LITERAL_HH
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# include <mln/core/concept/object.hh>
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namespace
mln
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{
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// Fwd decl.
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template
<
typename
E>
struct
Literal;
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// Literal category flag type.
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template
<>
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struct
Literal<void>
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{
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typedef
Object<void> super;
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};
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template
<
typename
E>
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struct
Literal
:
public
Object
<E>
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{
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typedef
Literal<void>
category;
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static
const
E& the();
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protected
:
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Literal
();
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};
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# ifndef MLN_INCLUDE_ONLY
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template
<
typename
E>
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inline
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Literal<E>::Literal
()
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{
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}
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template
<
typename
E>
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inline
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const
E&
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Literal<E>::the()
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{
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static
E the_;
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return
the_;
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}
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# endif // ! MLN_INCLUDE_ONLY
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}
// end of namespace mln
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#endif // ! MLN_CORE_CONCEPT_LITERAL_HH
mln
core
concept
literal.hh
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