/ 
Types-Music-0.0200
River stage one • 1 direct dependent • 5 total dependents
/ Types::Music

NAME

Types::Music - Type Library for Music Programming

VERSION

version 0.0200

SYNOPSIS

use Moo;
use Types::Music -all;

has bars => (
    is      => 'ro',
    isa     => PosInt,
    default => '4',
);

has iso_note => (
    is      => 'ro',
    isa     => Named_Note_Octave,
    default => 'C4',
);

DESCRIPTION

This is a type constraint library for developing music software.

USAGE

use Types::Music qw(:types);

Exports all types by name.

use Types::Music qw(:is);

Exports all is_TypeName functions.

use Types::Music qw(:assert);

Exports all assert_TypeName functions.

use Types::Music qw(:to);

Exports all to_TypeName functions.

use Types::Music qw(+TypeName);

Exports TypeName and all related functions.

use Types::Music qw(:all);

Exports everything.

TYPES

PosInt

A positive integer. This can be used for things like beats per minute, number of measures (or "bars"), beats, etc.

Octave

A numeric octave. Usually 1 to 6. Higher and it's not really audible. Zero 0 is special cased to allow specific module behavior.

Signature

A string representing a time signature, like 3/4. The Signature is a fraction with Beats as numerator and Divisions as denominator.

Key

A key note, like C, C#, Bb, etc.

Named_Note

A named note, in either tradional or MIDI-Perl notation, like C, C#, Cs, Bb, Bf, etc.

Named_Note_Octave

A named note with octave, like C4, C#5, Cs5, Bb2, Bf2, etc.

Mode

A mode name. The known modes are:

ionian / major
dorian
phrygian
lydian
mixolydian
aeolian / minor
locrian

FUNCTIONS

is_PosInt

Returns true if the passed value can be used as a "PosInt".

assert_PosInt

Returns the passed value if and only if it can be used as a "PosInt", otherwise an exception is thrown.

is_Octave

Returns true if the passed value can be used as an "Octave".

assert_Octave

Returns the passed value if and only if it can be used as an "Octave", otherwise an exception is thrown.

is_Signature

Returns true if the passed value can be used as a time signature "Signature".

assert_Signature

Returns the passed value if and only if it can be used as a time signature "Signature", otherwise an exception is thrown.

is_Key

Returns true if the passed value can be used as a "Key".

assert_Key

Returns the passed value if and only if it can be used as a "Key", otherwise an exception is thrown.

is_Named_Note

Returns true if the passed value can be used as a "Named_Note".

assert_Named_Note

Returns the passed value if and only if it can be used as a "Named_Note", otherwise an exception is thrown.

is_Named_Note_Octave

Returns true if the passed value can be used as a "Named_Note_Octave".

assert_Named_Note_Octave

Returns the passed value if and only if it can be used as a "Named_Note_Octave", otherwise an exception is thrown.

is_Mode

Returns true if the passed value can be used as a "Mode".

assert_Mode

Returns the passed value if and only if it can be used as a "Mode", otherwise an exception is thrown.

SEE ALSO

Type::Tiny

AUTHOR

Gene Boggs <gene.boggs@gmail.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2025 by Gene Boggs.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.