std::not_equal_to
Defined in header <functional> | ? | ? |
---|---|---|
template< class T > struct not_equal_to; | ? | (until C++14) |
template< class T = void > struct not_equal_to; | ? | (since C++14) |
用于执行比较的函数对象。除非是专门的,否则调用operator!=
论类型T
...
专门性
The standard library provides a specialization of std::not_equal_to when T is not specified, which leaves the parameter types and return type to be deduced. not_equal_to<void> function object implementing x != y deducing argument and return types (class template specialization) | not_equal_to<void> | function object implementing x != y deducing argument and return types (class template specialization) | (since C++14) |
---|---|---|---|
not_equal_to<void> | function object implementing x != y deducing argument and return types (class template specialization) |
成员类型
type | definition |
---|---|
result_type(deprecated in C++17) | bool |
first_argument_type(deprecated in C++17) | T |
second_argument_type(deprecated in C++17) | T |
成员函数
operator() | checks if the arguments are not equal (public member function) |
---|
STD:不[医]平等[医]致:操作员%28%29
bool operator()( const T& lhs, const T& rhs ) const; | ? | (until C++14) |
---|---|---|
constexpr bool operator()( const T& lhs, const T& rhs ) const; | ? | (since C++14) |
检查是否lhs
是不平等到rhs
...
参数
lhs, rhs | - | values to compare |
---|
返回值
true
如果lhs != rhs
,,,false
否则。
例外
%280%29
可能的实施
ConstT&rhs%29 const{返回lhs%21=rhs;}
*。
? cppreference.com
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