Difference between revisions of "cpp/utility/functional/plus"
From cppreference.com
< cpp | utility | functional
(deprecated typedefs) |
(→Member types: +) |
||
| Line 27: | Line 27: | ||
{{rev end}} | {{rev end}} | ||
| − | + | {{cpp/utility/functional/member types|result=T|arg1=T|arg2=T}} | |
| − | {{ | + | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
===Member functions=== | ===Member functions=== | ||
Revision as of 11:42, 9 June 2018
| 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 (deprecated in C++17)(removed in C++20)
|
T
|
first_argument_type (deprecated in C++17)(removed in C++20)
|
T
|
second_argument_type (deprecated in C++17)(removed in C++20)
|
T
|
|
These member types are obtained via publicly inheriting std::binary_function<T, T, T>. |
(until C++11) |
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
constexpr T operator()(const T &lhs, const T &rhs) const { return lhs + rhs; } |
