Returns true when a condition is present at least once in the specified range of elements.
An input iterator that indicates where to start checking a range of elements for a condition.
An input iterator that indicates the end of the range of elements to check for a condition.
A condition to test for. This is provided by a user-defined predicate function object. The predicate defines the condition to be satisfied by the element being tested. A predicate takes a single argument and returns true or false.
Returns true if the condition is detected at least once in the indicated range, false if the condition is never detected.
The template function returns true only if, for some N in the range
[0, _Last - _First), the predicate _Comp(*(_First + N)) is true.