tmp/tmpnyflvjg2/{from.md → to.md}
RENAMED
|
@@ -0,0 +1,70 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
### Negators <a id="depr.negators">[[depr.negators]]</a>
|
| 2 |
+
|
| 3 |
+
The header `<functional>` has the following additions:
|
| 4 |
+
|
| 5 |
+
``` cpp
|
| 6 |
+
namespace std {
|
| 7 |
+
template <class Predicate> class unary_negate;
|
| 8 |
+
template <class Predicate>
|
| 9 |
+
constexpr unary_negate<Predicate> not1(const Predicate&);
|
| 10 |
+
template <class Predicate> class binary_negate;
|
| 11 |
+
template <class Predicate>
|
| 12 |
+
constexpr binary_negate<Predicate> not2(const Predicate&);
|
| 13 |
+
}
|
| 14 |
+
```
|
| 15 |
+
|
| 16 |
+
Negators `not1` and `not2` take a unary and a binary predicate,
|
| 17 |
+
respectively, and return their logical negations ([[expr.unary.op]]).
|
| 18 |
+
|
| 19 |
+
``` cpp
|
| 20 |
+
template <class Predicate>
|
| 21 |
+
class unary_negate {
|
| 22 |
+
public:
|
| 23 |
+
constexpr explicit unary_negate(const Predicate& pred);
|
| 24 |
+
constexpr bool operator()(const typename Predicate::argument_type& x) const;
|
| 25 |
+
using argument_type = typename Predicate::argument_type;
|
| 26 |
+
using result_type = bool;
|
| 27 |
+
};
|
| 28 |
+
```
|
| 29 |
+
|
| 30 |
+
``` cpp
|
| 31 |
+
constexpr bool operator()(const typename Predicate::argument_type& x) const;
|
| 32 |
+
```
|
| 33 |
+
|
| 34 |
+
*Returns:* `!pred(x)`.
|
| 35 |
+
|
| 36 |
+
``` cpp
|
| 37 |
+
template <class Predicate>
|
| 38 |
+
constexpr unary_negate<Predicate> not1(const Predicate& pred);
|
| 39 |
+
```
|
| 40 |
+
|
| 41 |
+
*Returns:* `unary_negate<Predicate>(pred)`.
|
| 42 |
+
|
| 43 |
+
``` cpp
|
| 44 |
+
template <class Predicate>
|
| 45 |
+
class binary_negate {
|
| 46 |
+
public:
|
| 47 |
+
constexpr explicit binary_negate(const Predicate& pred);
|
| 48 |
+
constexpr bool operator()(const typename Predicate::first_argument_type& x,
|
| 49 |
+
const typename Predicate::second_argument_type& y) const;
|
| 50 |
+
using first_argument_type = typename Predicate::first_argument_type;
|
| 51 |
+
using second_argument_type = typename Predicate::second_argument_type;
|
| 52 |
+
using result_type = bool;
|
| 53 |
+
|
| 54 |
+
};
|
| 55 |
+
```
|
| 56 |
+
|
| 57 |
+
``` cpp
|
| 58 |
+
constexpr bool operator()(const typename Predicate::first_argument_type& x,
|
| 59 |
+
const typename Predicate::second_argument_type& y) const;
|
| 60 |
+
```
|
| 61 |
+
|
| 62 |
+
*Returns:* `!pred(x,y)`.
|
| 63 |
+
|
| 64 |
+
``` cpp
|
| 65 |
+
template <class Predicate>
|
| 66 |
+
constexpr binary_negate<Predicate> not2(const Predicate& pred);
|
| 67 |
+
```
|
| 68 |
+
|
| 69 |
+
*Returns:* `binary_negate<Predicate>(pred)`.
|
| 70 |
+
|