From Jason Turner

[valarray.comparison]

C++17 → C++20 6.9 KB 94 lines
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- #### `valarray` logical operators <a id="valarray.comparison">[[valarray.comparison]]</a>
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  ``` cpp
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- template<class T> valarray<bool> operator==
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator!=
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator<
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator>
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator<=
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator>=
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator&&
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- (const valarray<T>&, const valarray<T>&);
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- template<class T> valarray<bool> operator||
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- (const valarray<T>&, const valarray<T>&);
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  ```
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- *Requires:* Each of these operators may only be instantiated for a type
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- `T` to which the indicated operator can be applied and for which the
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- indicated operator returns a value which is of type `bool` or which can
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- be unambiguously implicitly converted to type `bool`. The two array
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- arguments have the same length.
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  *Returns:* A `valarray<bool>` whose length is equal to the length of the
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  array arguments. Each element of the returned array is initialized with
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  the result of applying the indicated operator to the corresponding
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  elements of the argument arrays.
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  ``` cpp
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- template<class T> valarray<bool> operator==(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator==(const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator!=(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator!=(const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator< (const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator< (const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator> (const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator> (const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator<=(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator<=(const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator>=(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator>=(const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator&&(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator&&(const T&, const valarray<T>&);
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- template<class T> valarray<bool> operator||(const valarray<T>&, const T&);
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- template<class T> valarray<bool> operator||(const T&, const valarray<T>&);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  ```
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- *Requires:* Each of these operators may only be instantiated for a type
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- `T` to which the indicated operator can be applied and for which the
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- indicated operator returns a value which is of type `bool` or which can
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- be unambiguously implicitly converted to type `bool`.
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  *Returns:* A `valarray<bool>` whose length is equal to the length of the
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  array argument. Each element of the returned array is initialized with
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  the result of applying the indicated operator to the corresponding
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  element of the array and the non-array argument.
 
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+ #### Logical operators <a id="valarray.comparison">[[valarray.comparison]]</a>
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  ``` cpp
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+ template<class T> valarray<bool> operator==(const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator!=(const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator< (const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator> (const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator<=(const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator>=(const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator&&(const valarray<T>&, const valarray<T>&);
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+ template<class T> valarray<bool> operator||(const valarray<T>&, const valarray<T>&);
 
 
 
 
 
 
 
 
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  ```
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+ *Mandates:* The indicated operator can be applied to operands of type
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+ `T` and returns a value of type `bool` or which can be unambiguously
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+ implicitly converted to `bool`.
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+
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+ *Preconditions:* The two array arguments have the same length.
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  *Returns:* A `valarray<bool>` whose length is equal to the length of the
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  array arguments. Each element of the returned array is initialized with
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  the result of applying the indicated operator to the corresponding
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  elements of the argument arrays.
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  ``` cpp
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+ template<class T> valarray<bool> operator==(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator==(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator!=(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator!=(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator< (const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator< (const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator> (const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator> (const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator<=(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator<=(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator>=(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator>=(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator&&(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator&&(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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+ template<class T> valarray<bool> operator||(const valarray<T>&,
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+ const typename valarray<T>::value_type&);
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+ template<class T> valarray<bool> operator||(const typename valarray<T>::value_type&,
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+ const valarray<T>&);
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  ```
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+ *Mandates:* The indicated operator can be applied to operands of type
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+ `T` and returns a value of type `bool` or which can be unambiguously
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+ implicitly converted to `bool`.
 
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  *Returns:* A `valarray<bool>` whose length is equal to the length of the
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  array argument. Each element of the returned array is initialized with
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  the result of applying the indicated operator to the corresponding
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  element of the array and the non-array argument.