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1 | #!/usr/bin/env perl |
2 | package Mouse::Util; |
3 | use strict; |
4 | use warnings; |
5 | use base 'Exporter'; |
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6 | use Carp; |
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7 | |
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8 | BEGIN { |
9 | our %dependencies = ( |
10 | 'Scalar::Util' => { |
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11 | |
12 | # VVVVV CODE TAKEN FROM SCALAR::UTIL VVVVV |
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13 | 'blessed' => do { |
14 | *UNIVERSAL::a_sub_not_likely_to_be_here = sub { |
15 | my $ref = ref($_[0]); |
16 | |
17 | # deviation from Scalar::Util |
18 | # XS returns undef, PP returns GLOB. |
19 | # let's make that more consistent by having PP return |
20 | # undef if it's a GLOB. :/ |
21 | |
22 | # \*STDOUT would be allowed as an object in PP blessed |
23 | # but not XS |
24 | return $ref eq 'GLOB' ? undef : $ref; |
25 | }; |
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26 | |
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27 | sub { |
28 | local($@, $SIG{__DIE__}, $SIG{__WARN__}); |
29 | length(ref($_[0])) |
30 | ? eval { $_[0]->a_sub_not_likely_to_be_here } |
31 | : undef; |
32 | }, |
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33 | }, |
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34 | 'looks_like_number' => sub { |
35 | local $_ = shift; |
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36 | |
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37 | # checks from perlfaq4 |
38 | return 0 if !defined($_) or ref($_); |
39 | return 1 if (/^[+-]?\d+$/); # is a +/- integer |
40 | return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); # a C float |
41 | return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006001 and /^Inf$/i); |
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42 | |
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43 | 0; |
44 | }, |
45 | 'reftype' => sub { |
46 | local($@, $SIG{__DIE__}, $SIG{__WARN__}); |
47 | my $r = shift; |
48 | my $t; |
49 | |
50 | length($t = ref($r)) or return undef; |
51 | |
52 | # This eval will fail if the reference is not blessed |
53 | eval { $r->a_sub_not_likely_to_be_here; 1 } |
54 | ? do { |
55 | $t = eval { |
56 | # we have a GLOB or an IO. Stringify a GLOB gives it's name |
57 | my $q = *$r; |
58 | $q =~ /^\*/ ? "GLOB" : "IO"; |
59 | } |
60 | or do { |
61 | # OK, if we don't have a GLOB what parts of |
62 | # a glob will it populate. |
63 | # NOTE: A glob always has a SCALAR |
64 | local *glob = $r; |
65 | defined *glob{ARRAY} && "ARRAY" |
66 | or defined *glob{HASH} && "HASH" |
67 | or defined *glob{CODE} && "CODE" |
68 | or length(ref(${$r})) ? "REF" : "SCALAR"; |
69 | } |
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70 | } |
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71 | : $t |
72 | }, |
73 | 'openhandle' => sub { |
74 | my $fh = shift; |
75 | my $rt = reftype($fh) || ''; |
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76 | |
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77 | return defined(fileno($fh)) ? $fh : undef |
78 | if $rt eq 'IO'; |
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79 | |
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80 | if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA) |
81 | $fh = \(my $tmp=$fh); |
82 | } |
83 | elsif ($rt ne 'GLOB') { |
84 | return undef; |
85 | } |
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86 | |
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87 | (tied(*$fh) or defined(fileno($fh))) |
88 | ? $fh : undef; |
89 | }, |
90 | weaken => { |
91 | loaded => \&Scalar::Util::weaken, |
92 | not_loaded => sub { die "Scalar::Util required for weak reference support" }, |
93 | }, |
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94 | # ^^^^^ CODE TAKEN FROM SCALAR::UTIL ^^^^^ |
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95 | }, |
96 | 'MRO::Compat' => { |
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97 | # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV |
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98 | 'get_linear_isa' => { |
99 | loaded => \&mro::get_linear_isa, |
100 | not_loaded => do { |
101 | # this recurses so it isn't pretty |
102 | my $code; |
103 | $code = sub { |
104 | no strict 'refs'; |
105 | |
106 | my $classname = shift; |
107 | |
108 | my @lin = ($classname); |
109 | my %stored; |
110 | foreach my $parent (@{"$classname\::ISA"}) { |
111 | my $plin = $code->($parent); |
112 | foreach (@$plin) { |
113 | next if exists $stored{$_}; |
114 | push(@lin, $_); |
115 | $stored{$_} = 1; |
116 | } |
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117 | } |
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118 | return \@lin; |
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119 | } |
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120 | }, |
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121 | }, |
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122 | # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ |
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123 | }, |
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124 | ); |
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125 | |
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126 | our %loaded; |
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127 | |
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128 | our @EXPORT_OK = map { keys %$_ } values %dependencies; |
129 | our %EXPORT_TAGS = ( |
130 | all => \@EXPORT_OK, |
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131 | ); |
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132 | |
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133 | for my $module_name (keys %dependencies) { |
134 | my $loaded = do { |
135 | local $SIG{__DIE__} = 'DEFAULT'; |
136 | eval "require $module_name; 1"; |
137 | }; |
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138 | |
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139 | $loaded{$module_name} = $loaded; |
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140 | |
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141 | for my $method_name (keys %{ $dependencies{ $module_name } }) { |
142 | my $producer = $dependencies{$module_name}{$method_name}; |
143 | my $implementation; |
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144 | |
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145 | if (ref($producer) eq 'HASH') { |
146 | $implementation = $loaded |
147 | ? $producer->{loaded} |
148 | : $producer->{not_loaded}; |
149 | } |
150 | else { |
151 | $implementation = $loaded |
152 | ? $module_name->can($method_name) |
153 | : $producer; |
154 | } |
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155 | |
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156 | no strict 'refs'; |
157 | *{ __PACKAGE__ . '::' . $method_name } = $implementation; |
158 | } |
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159 | } |
160 | } |
161 | |
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162 | sub apply_all_roles { |
163 | my $meta = Mouse::Meta::Class->initialize(shift); |
164 | my $role = shift; |
165 | confess "Mouse::Util only supports 'apply_all_roles' on individual roles at a time" if @_; |
166 | |
167 | Mouse::load_class($role); |
168 | $role->meta->apply($meta); |
169 | } |
170 | |
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171 | 1; |
172 | |
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173 | __END__ |
174 | |
175 | =head1 NAME |
176 | |
177 | Mouse::Util - features, with or without their dependencies |
178 | |
179 | =head1 IMPLEMENTATIONS FOR |
180 | |
181 | =head2 L<MRO::Compat> |
182 | |
183 | =head3 get_linear_isa |
184 | |
185 | =head2 L<Scalar::Util> |
186 | |
187 | =head3 blessed |
188 | |
189 | =head3 looks_like_number |
190 | |
191 | =head3 reftype |
192 | |
193 | =head3 openhandle |
194 | |
195 | =head3 weaken |
196 | |
197 | C<weaken> I<must> be implemented in XS. If the user tries to use C<weaken> |
198 | without L<Scalar::Util>, an error is thrown. |
199 | |
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200 | =head2 Test::Exception |
201 | |
202 | =head3 throws_ok |
203 | |
204 | =head3 lives_ok |
205 | |
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206 | =cut |
207 | |