std::multiplies

来自cppreference.com

 
 
实用工具库
类型的支持 (basic types, RTTI, type traits)
动态内存管理
错误处理
程序实用工具
可变参数函数
日期和时间
函数对象
initializer_list(C++11)
bitset
hash(C++11)
关系运算符
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
双和元组
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
掉期,远期和移动
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
函数对象
功能包装
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Function wrappers
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function(C++11)
mem_fn(C++11)
bad_function_call(C++11)
绑定
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Bind
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bind(C++11)
is_bind_expression(C++11)
is_placeholder(C++11)
_1, _2, _3, ...(C++11)
参考包装
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Reference wrappers
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reference_wrapper(C++11)
ref
cref
(C++11)
(C++11)
操作包装
Original:
Operator wrappers
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否定词
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Negators
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已过时粘合剂和适配器
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Deprecated binders and adaptors
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unary_function(过时了)
binary_function(过时了)
ptr_fun(过时了)
pointer_to_unary_function(过时了)
pointer_to_binary_function(过时了)
mem_fun(过时了)
mem_fun_t
mem_fun1_t
const_mem_fun_t
const_mem_fun1_t
(过时了)
(过时了)
(过时了)
(过时了)
mem_fun_ref(过时了)
mem_fun_ref_t
mem_fun1_ref_t
const_mem_fun_ref_t
const_mem_fun1_ref_t
(过时了)
(过时了)
(过时了)
(过时了)
binder1st
binder2nd
(过时了)
(过时了)
bind1st
bind2nd
(过时了)
(过时了)
 
Defined in header <functional>
template< class T >
struct multiplies;
执行乘法的函数对象。有效地调用operator*的两个实例的类型T.
Original:
Function object for performing multiplication. Effectively calls operator* on two instances of type T.
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目录

[编辑] 会员类型

类型
Original:
Type
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Definition
result_type T
first_argument_type T
second_argument_type T

[编辑] 成员函数

operator()
返回两个参数的产品
Original:
returns the product of two arguments
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(公共成员函数)

的std ::相乘
Original:
std::multiplies::
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operator()

T operator()( const T& lhs, const T& rhs ) const;

Returns the product of lhs and rhs.

Parameters

lhs, rhs -
值乘
Original:
values to multiply
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Return value

The result of lhs * rhs.

Exceptions

(none)

Possible implementation

T operator()(const T &lhs, const T &rhs) const
{
    return lhs * rhs;
}