at¶
-
const_reference libsemigroups::FroidurePin::at(element_index_type)¶
Returns the element of the semigroup in position
pos
, or anullptr
if there is no such element.This member function attempts to enumerate the semigroup until at least
pos
+ 1 elements have been found. Ifpos
is greater than FroidurePin::size, then this member function returnsnullptr
.