Standard Template Library Programmer's Guide

greater()	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 greater's members are defined in the Adaptable Binary Predicate and DefaultConstructible requirements. Greater does not introduce any new members.

See also

The function object overview, Adaptable Binary Predicate, LessThan Comparable, equal_to, not_equal_to, less, greater_equal, less_equal

less_equal<T>

Category: functors

Component type: type

Description

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.

Example

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);

Definition

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

Template parameters

Parameter	Description
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>.

Members

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