Provided by: libmath-prime-util-perl_0.73-2build2_amd64 bug

NAME

       Math::Prime::Util::PrimeIterator - An object iterator for primes

VERSION

       Version 0.73

SYNOPSIS

         use Math::Prime::Util::PrimeIterator;
         my $it = Math::Prime::Util::PrimeIterator->new();

         # Simple use: return current value and move forward.
         my $sum = 0;  $sum += $it->iterate() for 1..10000;

         # Methods
         my $v = $it->value();     # Return current value
         $it->next();              # Move to next prime (returns self)
         $it->prev();              # Move to prev prime (returns self)
         $v = $it->iterate();      # Returns current value; moves to next prime
         $it->rewind();            # Resets position to 2
         $it->rewind($n);          # Resets position to next_prime($n-1)

         # Methods similar to Math::NumSeq, do not change iterator
         $it->tell_i();            # Returns the index of the current position
         $it->pred($n);            # Returns true if $n is prime
         $it->ith($i);             # Returns the $ith prime
         $it->value_to_i($n);      # Returns the index of the first prime >= $n
         $it->value_to_i_estimate($n);  # Approx index of value $n

         # Methods similar to Math::NumSeq, changes iterator
         $it->seek_to_i($i);       # Resets position to the $ith prime
         $it->seek_to_value($i);   # Resets position to next_prime($i-1)

DESCRIPTION

       An iterator over the primes.  "new" returns an iterator object and takes an optional
       starting position (the initial value will be the least prime greater than or equal to the
       argument).  BigInt objects will be returned if the value overflows a Perl unsigned integer
       value.

METHODS

   new
       Creates an iterator object with initial value of 2.  If an argument is given, the initial
       value will be the least prime greater than or equal to the argument.

   value
       Returns the value at the current position.  Will always be a prime.  If the value is
       greater than ~0, it will be a Math::BigInt object.

   next
       Moves the current position to the next prime.  Returns self so calls can be chained.

   prev
       Moves the current position to the previous prime, unless the current value is 2, in which
       case the value remains 2.  Returns self so calls can be chained.

   iterate
       Returns the value at the current position and also moves the position to the next prime.

   rewind
       Resets the current position to either 2 or, if given an integer argument, the least prime
       not less than the argument.

   peek
       Returns the value at the next position without moving the iterator.

   tell_i
       Returns the index of the current position, starting at 1 (corresponding to the value 2).
       The iterator is unchanged after this call.

   pred
       Returns true if the argument is a prime, false otherwise.  The iterator is unchanged after
       this call.

   ith
       Returns the i'th prime, where the first prime is 2.  The iterator is unchanged after this
       call.

   value_to_i_estimate
       Returns an estimate of the index corresponding to the argument.  That is, given a value
       "n", we expect a prime approximately equal to "n" to occur at this index.

       The estimate is performed using "prime_count_approx" in Math::Prime::Util, which uses the
       estimates of Dusart 2010 (or better for small values).

   value_to_i
       If the argument is prime, returns the corresponding index, such that:

         ith( value_to_i( $n ) ) == $n

       Returns "undef" if the argument is not prime.

   value_to_i_floor
   value_to_i_ceil
       Returns the index corresponding to the first prime less than or equal to the argument, or
       greater than or equal to the argument, respectively.

   seek_to_i
       Resets the position to the prime corresponding to the given index.

   seek_to_value
       An alias for "rewind".

   i_start =head2 description =head2 values_min =head2 values_max =head2 oeis_anum
       Methods to match Math::NumSeq::Primes.

SEE ALSO

       Math::Prime::Util

       "forprimes" in Math::Prime::Util

       "prime_iterator" in Math::Prime::Util

       "prime_iterator_object" in Math::Prime::Util

       Math::Prime::Util::PrimeArray

       Math::NumSeq::Primes

       List::Gen

AUTHORS

       Dana Jacobsen <dana@acm.org>

COPYRIGHT

       Copyright 2013 by Dana Jacobsen <dana@acm.org>

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.