Category: functors Component type: type


Less_equal<T> is a function object. Specifically, it is an Adaptable Binary Predicate, which means it is a function object that tests the truth or falsehood of some condition. If f is an object of class less_equal<T> and x and y are objects of class T, then f(x,y) returns true if x <= y and false otherwise.


Finds the first non-positive element in a list.
list<int> L;
list<int>::iterator first_nonpositive = 
       find_if(L.begin(), L.end(), bind2nd(less_equal<int>(), 0));
assert(first_nonpositive == L.end() || *first_nonpositive <= 0);


Defined in the standard header functional, and in the nonstandard backward-compatibility header function.h.

Template parameters

Parameter Description Default
T The type of less_equal's arguments.  

Model of

Adaptable Binary Predicate, DefaultConstructible

Type requirements

T is LessThan Comparable.

Public base classes

binary_function<T, T, bool>.


Member Where defined Description
first_argument_type Adaptable Binary Predicate The type of the first argument: T
second_argument_type Adaptable Binary Predicate The type of the second argument: T
result_type Adaptable Binary Predicate The type of the result: bool
less_equal() DefaultConstructible The default constructor.
bool operator()(const T& x, const T& y) Binary Function Function call operator. The return value is x <= y.

New members

All of less_equal's members are defined in the Adaptable Binary Predicate and DefaultConstructible requirements. Less_equal does not introduce any new members.


See also

The function object overview, Adaptable Binary Predicate, equal_to, not_equal_to, greater, less, greater_equal,
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