std::negate
Defined in header <functional> | | |
|---|---|---|
template< class T > struct negate; | | (until C++14) |
template< class T = void > struct negate; | | (since C++14) |
用于执行否定的函数对象。有效呼叫operator-关于类型的实例T...
专门性
The standard library provides a specialization of std::negate when T is not specified, which leaves the parameter types and return type to be deduced. negate<void> function object implementing -x deducing argument and return types (class template specialization) | negate<void> | function object implementing -x deducing argument and return types (class template specialization) | (since C++14) |
|---|---|---|---|
negate<void> | function object implementing -x deducing argument and return types (class template specialization) |
成员类型
Type | Definition |
|---|---|
result_type(deprecated in C++17) | T |
argument_type(deprecated in C++17) | T |
成员函数
operator() | returns the negation of the argument (public member function) |
|---|
STD：：否定：：操作员%28%29
T operator()( const T& arg ) const; | | (until C++14) |
|---|---|---|
constexpr T operator()( const T& arg ) const; | | (since C++14) |
返回arg...
参数
arg | - | value to compute negation of |
|---|
返回值
结果-arg...
例外
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可能的实施
常数T运算符%28%29%28 const T&Arg%29 const{back-Arg；}
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