Adapters

Note: These are sometimes useful but look complicated, so don't worry if you don't understand them. Examples are online .

Adapters are ways to adapt existing predicates - they take and return a function that we can then use with Standard Library algorithms. There are 4 types -

binder

- to use a 2-arg function object as a 1-arg function. less is a binary predicate. If we want make a unary predicate from it we can do bind2nd(less<int>(),7)).

member function adapter

- to use a member function

pointer to function adapter

- to use a pointer to a member function

negator

- to negate an existing predicate

These can be combined -

... find_if ( ....... not1(bind2nd(ptr_fun(strcmp), "funny")));