/usr/include/octave-4.2.2/octave/functor.h is in liboctave-dev 4.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | /*
Copyright (C) 2008-2017 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave 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 General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if ! defined (octave_functor_h)
#define octave_functor_h 1
#include "octave-config.h"
template <typename RT, typename PT>
class fcn_ptr
{
public:
typedef RT (*TYPE) (PT);
};
template <typename RT, typename PT>
class functor
{
private:
typedef typename fcn_ptr<RT, PT>::TYPE fcn_ptr_type;
fcn_ptr_type fptr;
public:
functor (fcn_ptr_type p) : fptr (p) { }
RT operator () (PT arg) { return fptr (arg); }
};
template <typename CT, typename RT, typename PT>
class functor_with_conversion
{
private:
typedef typename fcn_ptr<RT, PT>::TYPE fcn_ptr_type;
fcn_ptr_type fptr;
public:
functor_with_conversion (fcn_ptr_type p) : fptr (p) { }
CT operator () (PT arg) { return CT (fptr (arg)); }
};
template <typename RT, typename PT>
functor<RT, PT>
func_ptr (RT (*f) (PT))
{
return functor<RT, PT> (f);
}
template <typename CT, typename RT, typename PT>
functor_with_conversion<CT, RT, PT>
func_ptr_with_conversion (RT (*f) (PT))
{
return functor_with_conversion<CT, RT, PT> (f);
}
#endif
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