Difference between revisions of "cpp/utility/functional/plus"
From cppreference.com
< cpp | utility | functional
(+rev) |
(c++14 constexpr) |
||
| Line 41: | Line 41: | ||
{{member | {{small|std::plus::}}operator() | 2= | {{member | {{small|std::plus::}}operator() | 2= | ||
| − | {{ | + | {{dcl begin}} |
| + | {{dcl rev begin}} | ||
| + | {{dcl |until=c++14| | ||
T operator()( const T& lhs, const T& rhs ) const; | T operator()( const T& lhs, const T& rhs ) const; | ||
}} | }} | ||
| + | {{dcl |since=c++14| | ||
| + | constexpr T operator()( const T& lhs, const T& rhs ) const; | ||
| + | }} | ||
| + | {{dcl rev end}} | ||
| + | {{dcl end}} | ||
Returns the sum of {{tt|lhs}} and {{tt|rhs}}. | Returns the sum of {{tt|lhs}} and {{tt|rhs}}. | ||
Revision as of 16:05, 9 November 2013
| Defined in header <functional>
|
||
| template< class T > struct plus; |
(until C++14) | |
| template< class T = void > struct plus; |
(since C++14) | |
Function object for performing addition. Effectively calls operator+ on two instances of type T.
Contents |
Specializations
|
The standard library provides a specialization of
|
(since C++14) |
Member types
| Type | Definition |
result_type
|
T
|
first_argument_type
|
T
|
second_argument_type
|
T
|
Member functions
| operator() |
returns the sum of two arguments (public member function) |
std::plus::operator()
| T operator()( const T& lhs, const T& rhs ) const; |
(until C++14) | |
| constexpr T operator()( const T& lhs, const T& rhs ) const; |
(since C++14) | |
Returns the sum of lhs and rhs.
Parameters
| lhs, rhs | - | values to sum |
Return value
The result of lhs + rhs.
Exceptions
(none)
Possible implementation
T operator()(const T &lhs, const T &rhs) const { return lhs + rhs; } |
