prior

Moves an iterator 1 position backwards.

template<
    typename I
    >
typename result_of::prior<I>::type prior(I const& i);

Table 1.4. Parameters

Parameter	Requirement	Description
`i`	Model of Bidirectional Iterator	Operation's argument

prior(i);

Return type: A model of the same iterator concept as i.

Semantics: Returns an iterator to the element prior to i.

/iterator/prior.hpp>

typedef vector<int,int> vec;

vec v(1,2);
assert(deref(next(begin(v))) == 2);
assert(deref(prior(next(begin(v)))) == 1);