FunctionalPerl - functional programming in Perl


    use FunctionalPerl;
    FunctionalPerl->VERSION # or $FunctionalPerl::VERSION

    # The actual modules are in the FP:: namespace hierarchy, like:
    use FP::List;

    # But you can also import sets of modules from here, e.g.:
    use FunctionalPerl qw(:sequences :repl);


Allow Perl programs to be written with fewer side effects.

See the Functional Perl home page.


FunctionalPerl also acts as a convenience re-exporter, offering tags to load sets of modules.

Note that the tags and the sets of modules are very much alpha. If you want to have a better chance of code not breaking, import the modules you want directly.

Tags can be expanded via:

    my ($modules, $unused_tags)= FunctionalPerl::expand(qw(:dev :most));
    is $$modules{"FP::Failure"}, 2; # number of times used.
    use FP::Equal 'is_equal';
    is_equal $unused_tags,
             [':all', ':csv', ':dbi', ':fix', ':git', ':io', ':path', ':pxml', ':rare', ':trampoline', ':transparentlazy'];


This is the list of supported import tags and the modules that they import:

:all: :dev, :io, :most, :rare

:autobox: FP::autobox

:chars: FP::Char

:csv: FP::Text::CSV

:datastructures: :chars, :maps, :numbers, :sequences, :sets, :tries

:dbi: FP::DBI

:debug: :equal, :show, Chj::Backtrace, Chj::pp, Chj::time_this

:dev: :debug, :repl, :test, Chj::ruse

:doc: FP::Docstring

:equal: FP::Equal

:failure: FP::Failure

:fix: FP::fix

:functions: :equal, :failure, :show, FP::Combinators, FP::Div, FP::Memoizing, FP::Ops, FP::Optional, FP::Predicates, FP::Untainted, FP::Values, FP::uncurry

:git: FP::Git::Repository

:io: Chj::tempdir, Chj::xIO, Chj::xhome, Chj::xopen, Chj::xopendir, Chj::xoutpipe, Chj::xperlfunc, Chj::xpipe, Chj::xtmpfile, FP::IOStream

:lazy: :stream, FP::Lazy, FP::Weak

:maps: FP::Hash, FP::PureHash

:most: :autobox, :datastructures, :debug, :doc, :equal, :failure, :functions, :lazy, :show

:numbers: FP::BigInt

:path: FP::Path

:pxml: PXML::Serialize, PXML::Util, PXML::XHTML

:rare: :csv, :dbi, :fix, :git, :path, :trampoline

:repl: FP::Repl, FP::Repl::AutoTrap

:sequences: :stream, FP::Array, FP::Array_sort, FP::List, FP::MutableArray, FP::PureArray, FP::StrictList

:sets: FP::HashSet, FP::OrderedCollection

:show: FP::Show

:stream: FP::IOStream, FP::Stream, FP::Weak

:test: Chj::TEST

:trampoline: FP::Trampoline

:transparentlazy: :stream, FP::TransparentLazy, FP::Weak

:tries: FP::Trie


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