102 lines
5.0 KiB
Markdown
102 lines
5.0 KiB
Markdown
[valarray.comparison]
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# 29 Numerics library [[numerics]](./#numerics)
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## 29.6 Numeric arrays [[numarray]](numarray#valarray.comparison)
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### 29.6.3 valarray non-member operations [[valarray.nonmembers]](valarray.nonmembers#valarray.comparison)
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#### 29.6.3.2 Logical operators [valarray.comparison]
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[ð](#lib:operator==,valarray)
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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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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8229)
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*Mandates*: The indicated operator can be applied to operands of type T and returns
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a value of type bool or which can be unambiguously
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implicitly converted to bool[.](#1.sentence-1)
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8235)
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*Preconditions*: The two array arguments have the same length[.](#2.sentence-1)
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8240)
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*Returns*: A valarray<bool> whose length
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is equal to the length of the array arguments[.](#3.sentence-1)
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Each element of the returned
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array is initialized with the result of applying the indicated
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operator to the corresponding elements of the argument arrays[.](#3.sentence-2)
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[ð](#lib:operator==,valarray_)
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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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[4](#4)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8293)
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*Mandates*: The indicated operator can be applied to operands of type T and returns
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a value of type bool or which can be unambiguously
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implicitly converted to bool[.](#4.sentence-1)
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[5](#5)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L8299)
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*Returns*: A valarray<bool> whose
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length is equal to the length of the array argument[.](#5.sentence-1)
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Each element
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of the returned array is initialized with the result of applying the
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indicated operator to the corresponding element of the array and the non-array argument[.](#5.sentence-2)
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