Standard C++ Library Class Reference

r value of type X&

t value of type T

Requirements for Forward Iterators

The following expressions must be valid for forward iterators:

X u u might have a singular value

X() X() might be singular

X(a) copy constructor, a == X(a).

X u(a) copy constructor, u == a

X u = a assignment, u == a

a == b, a != b return value convertible to bool

*a return value convertible to T&

a->m equivalent to (*a).m

++r returns X&

r++ return value convertible to const X&

*r++ returns T&

Forward iterators have the condition that a == b implies *a == *b.

There are no restrictions on the number of passes an algorithm may make through the structure.