NAME

FP::Abstract::Sequence - functional sequence protocol

SYNOPSIS

use FP::Predicates "is_sequence"; # since we can't have it in
                                  # FP::Abstract::Sequence
use FP::PureArray;
use FP::StrictList;
use FP::List;
use FP::Stream;
use FP::Array 'array';

use FP::Equal 'is_equal';

is_equal list(purearray(3,4),
              strictlist(3,4),
              list(3,4),
              stream(3,4),
              cons(3,4), # ok this can't really count as a sequence,
                         # what to do about it?
              array(3,4), # Could `autobox` change this?
              3,
              {3=>4})->map(*is_sequence),
         list(1,1,1,1,1,0,0,0);

my $ns= purearray(FP::Abstract::Sequence->fp_interface_method_names);
#  The methods you can count on being supported by sequences.

is_equal $ns->sort->take(5),
         purearray('any', 'append', 'array', 'cons', 'drop');

DESCRIPTION

This is a functional protocol, i.e. its use does not exert any side effects (that are visible to the user). It does *not* imply `FP::Abstract::Pure`, though; impure data structures could implement it all the same (in addition to a mutation protocol).

SEE ALSO

FP::Abstract::Pure

NOTE

This is alpha software! Read the status section in the package README or on the website.