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std::valarray::operators

STD：：valArray：：运算符+，-，~，%21

valarray operator+() const;(1)​
valarray<T> operator-() const;(2)​
valarray<T> operator~() const;(3)​
valarray<bool> operator!() const;(4)​

将一元运算符应用于数字数组中的每个元素。

参数

%280%29

返回值

一个数字数组，包含通过将相应的运算符应用于*this...

例外

%280%29

注记

只有满足下列要求，才能实例化每个操作符：

  • 指定的运算符可应用于T

  • 结果值可以毫不含糊地转换为T%281-3%29或bool%284%29

函数的返回类型与std::valarray在这种情况下，替换类型具有以下属性：

  • 全const成员职能std::valarray提供。

  • std::valarray，，，std::slice_array，，，std::gslice_array，，，std::mask_array和std::indirect_array可以从替换类型构造。

  • 所有接受类型参数的函数conststd::valarray&除begin()和end()%28，因为C++14%29也应该接受替换类型。

  • 接受两个类型参数的所有函数conststd::valarray&应该接受每一个组合conststd::valarray&以及替代型。

  • 返回类型不会在最嵌套的参数类型上添加两个以上的模板嵌套级别。

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