| Defined in header <functional> | ||
|---|---|---|
template< class T > struct less_equal; | (until C++14) | |
template< class T = void > struct less_equal; | (since C++14) |
Function object for performing comparisons. Unless specialized, invokes operator<= on type T.
Specializations
The partial specialization of std::less_equal for any pointer type yields a total order, even if the built-in operator<= does not.
| The standard library provides a specialization of
| (since C++14) |
Member types
| type | definition |
|---|---|
result_type | bool |
first_argument_type | T |
second_argument_type | T |
Member functions
| operator() | checks if the first argument is less than or equal to the second (public member function) |
std::less_equal::operator()
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) |
Checks if lhs is less than or equal to rhs.
Parameters
| lhs, rhs | - | values to compare |
Return value
true if lhs <= rhs, false otherwise.
Exceptions
(none).
Possible implementation
constexpr bool operator()(const T &lhs, const T &rhs) const
{
return lhs <= rhs;
} |
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