||Component type: type
Logical_or<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 logical_and<T>
and x and y are objects of class T (where T is convertible
to bool) then f(x,y) returns true if and only if either x or
y is true. 
Finds the first instance of either ' ' or '\n' in a string.
const char* wptr = find_if(str, str + MAXLEN,
bind2nd(equal_to<char>(), ' '),
assert(wptr == str + MAXLEN || *wptr == ' ' || *wptr == '\n');
Defined in the standard header functional, and in the nonstandard
backward-compatibility header function.h.
The type of logical_or's arguments
Adaptable Binary Predicate, DefaultConstructible
T must be convertible to bool.
Public base classes
binary_function<T, T, bool>
All of logical_or's members are defined in the
Adaptable Binary Function and Default Constructible
Logical_or does not introduce any new members.
Logical_and and logical_or are not very useful by themselves.
They are mainly useful because, when combined with the function object
adaptor binary_compose, they perform logical operations on other
The function object overview, logical_and, logical_not.
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