/usr/include/octave-3.8.2/octave/lo-traits.h is in liboctave-dev 3.8.2-4.
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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | /*
Copyright (C) 2009-2013 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_lo_traits_h)
#define octave_lo_traits_h 1
// Ideas for these classes taken from C++ Templates, The Complete
// Guide by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley
// (2003).
// Select a type based on the value of a constant expression.
template <bool cond, typename T1, typename T2>
class if_then_else;
template<typename T1, typename T2>
class if_then_else<true, T1, T2>
{
public:
typedef T1 result;
};
template<typename T1, typename T2>
class if_then_else<false, T1, T2>
{
public:
typedef T2 result;
};
// Determine whether two types are equal.
template <class T1, class T2>
class equal_types
{
public:
static const bool value = false;
};
template <class T>
class equal_types <T, T>
{
public:
static const bool value = true;
};
// Determine whether a type is an instance of a template.
template <template <class> class Template, class T>
class is_instance
{
public:
static const bool value = false;
};
template <template <class> class Template, class T>
class is_instance <Template, Template<T> >
{
public:
static const bool value = true;
};
// Determine whether a template paramter is a class type.
template<typename T1>
class is_class_type
{
private:
typedef char one;
typedef struct { char c[2]; } two;
// Classes can have pointers to members.
template<typename T2> static one is_class_type_test (int T2::*);
// Catch everything else.
template<typename T2> static two is_class_type_test (...);
public:
enum { yes = sizeof (is_class_type_test<T1> (0)) == 1 };
enum { no = ! yes };
};
// Define typename ref_param<T>::type as T const& if T is a class
// type. Otherwise, define it to be T.
template<typename T>
class ref_param
{
public:
typedef typename if_then_else<is_class_type<T>::no, T, T const&>::result type;
};
// Will turn TemplatedClass<T> to T, leave T otherwise.
// Useful for stripping wrapper classes, like octave_int.
template<template<typename> class TemplatedClass, typename T>
class strip_template_param
{
public:
typedef T type;
};
template<template<typename> class TemplatedClass, typename T>
class strip_template_param<TemplatedClass, TemplatedClass<T> >
{
public:
typedef T type;
};
// Will turn TemplatedClass<T> to TemplatedClass<S>, T to S otherwise.
// Useful for generic promotions.
template<template<typename> class TemplatedClass, typename T, typename S>
class subst_template_param
{
public:
typedef S type;
};
template<template<typename> class TemplatedClass, typename T, typename S>
class subst_template_param<TemplatedClass, TemplatedClass<T>, S>
{
public:
typedef TemplatedClass<S> type;
};
#endif
|