Commit | Line | Data |
8af0a70d |
1 | package MooseX::TypeLibrary::Base; |
2 | use warnings; |
3 | use strict; |
4 | |
5 | #use Smart::Comments; |
6 | use Sub::Install qw( install_sub ); |
7 | use Carp qw( croak ); |
8 | use Moose::Util::TypeConstraints; |
9 | use namespace::clean; |
10 | |
11 | my $UndefMsg = q{Unable to find type '%s' in library '%s'}; |
12 | |
13 | sub import { |
14 | my ($class, @types) = @_; |
15 | |
16 | # flatten out tags |
17 | @types = map { $_ eq ':all' ? $class->type_names : $_ } @types; |
18 | |
19 | TYPE: |
20 | # export all requested types |
21 | for my $type (@types) { |
22 | $class->export_type_into( |
23 | scalar(caller), $type, sprintf $UndefMsg, $type, $class ); |
24 | } |
25 | return 1; |
26 | } |
27 | |
28 | sub export_type_into { |
29 | my ($class, $target, $type, $undef_msg, %args) = @_; |
30 | |
31 | # the real type name and its type object |
32 | my $full = $class->get_type($type); |
33 | my $tobj = find_type_constraint($full); |
34 | ### Exporting: $full |
35 | |
36 | # install Type name constant |
37 | install_sub({ |
38 | code => MooseX::TypeLibrary->type_export_generator($type, $full), |
39 | into => $target, |
40 | as => $type, |
41 | }); |
42 | |
43 | # install is_Type test function |
44 | install_sub({ |
45 | code => MooseX::TypeLibrary |
46 | ->check_export_generator($type, $full, $undef_msg), |
47 | into => $target, |
48 | as => "is_$type", |
49 | }); |
50 | |
51 | # only install to_Type coercion handler if type can coerce |
52 | return 1 unless $args{ -full } or $tobj->has_coercion; |
53 | |
54 | # install to_Type coercion handler |
55 | install_sub({ |
56 | code => MooseX::TypeLibrary |
57 | ->coercion_export_generator($type, $full, $undef_msg), |
58 | into => $target, |
59 | as => "to_$type", |
60 | }); |
61 | |
62 | return 1; |
63 | } |
64 | |
65 | sub get_type { |
66 | my ($class, $type) = @_; |
67 | |
68 | # useful message if the type couldn't be found |
69 | croak "Unknown type '$type' in library '$class'" |
70 | unless $class->has_type($type); |
71 | |
72 | # return real name of the type |
73 | return $class->type_storage->{ $type }; |
74 | } |
75 | |
76 | sub type_names { |
77 | my ($class) = @_; |
78 | |
79 | # return short names of all stored types |
80 | return keys %{ $class->type_storage }; |
81 | } |
82 | |
83 | sub add_type { |
84 | my ($class, $type) = @_; |
85 | |
86 | # store type with library prefix as real name |
87 | $class->type_storage->{ $type } = "${class}::${type}"; |
88 | } |
89 | |
90 | sub has_type { |
91 | my ($class, $type) = @_; |
92 | |
93 | # check if we stored a type under that name |
94 | return ! ! $class->type_storage->{ $type }; |
95 | } |
96 | |
97 | sub type_storage { |
98 | my ($class) = @_; |
99 | |
100 | # return a reference to the storage in ourself |
101 | { no strict 'refs'; |
102 | return \%{ $class . '::__MOOSEX_TYPELIBRARY_STORAGE' }; |
103 | } |
104 | } |
105 | |
106 | 1; |