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package Perinci::Sub::Gen::FromClass; |
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our $DATE = '2014-08-04'; # DATE |
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our $VERSION = '0.02'; # VERSION |
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4876
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use 5.010001; |
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use strict; |
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use warnings; |
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use Monkey::Patch::Action qw(patch_package); |
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4337
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use Perinci::Sub::Gen; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw(gen_func_from_class); |
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our %SPEC; |
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$SPEC{gen_func_from_class} = { |
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v => 1.1, |
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summary => 'Generate function from a class', |
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description => <<'_', |
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`gen_func_from_class` will create a function and Rinci metadata from a |
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{Mo,Moo,Moose,Mouse} class. Given a class like this: |
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# MyClass |
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use Moo; |
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has attr1 => (is => 'ro', required=>1); |
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has attr2 => (is => 'rw'); |
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sub meth1 { ... } |
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sub meth2 { ... } |
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1; |
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will create a function that does something like this (it will basically |
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instantiate a class, set its attributes, and call a method): |
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MyClass->new(attr1=>..., attr2=>...)->meth1; |
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40
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along with Rinci metadata like this: |
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{ |
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v => 1.1, |
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args => { |
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attr1 => { req=>1, schema=>'any' }, |
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attr2 => { schema=>'any' }, |
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}, |
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} |
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50
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Currently only Mo- and Moo-based class is supported. Support for other Mo* |
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family members will be added. |
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53
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_ |
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args => { |
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%Perinci::Sub::Gen::common_args, |
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class => { |
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summary => 'Class name, will be loaded with require()', |
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req => 1, |
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}, |
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method => { |
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summary => 'Method of class to call', |
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req => 1, |
63
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# XXX guess if not specified? |
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}, |
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method_args => { |
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schema => 'array*', |
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}, |
68
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}, |
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result => { |
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summary => 'A hash containing generated function, metadata', |
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schema => 'hash*', |
72
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}, |
73
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}; |
74
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sub gen_func_from_class { |
75
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2
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2
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1
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3125
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my %args = @_; |
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77
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2
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50
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11
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my $class = $args{class} or return [400, "Please specify 'class'"]; |
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2
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50
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16
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$class =~ /\A\w+(::\w+)*\z/ or |
79
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return [400, "Invalid value for 'class', please use Foo::Bar ". |
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"syntax only"]; |
81
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2
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50
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11
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my $method = $args{method} or return [400, "Please specify 'method'"]; |
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83
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2
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4
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my %mo_attrs; |
84
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{ |
85
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2
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3
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my $handle_mo; |
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2
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3
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86
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# doesn't work if Mo is inlined |
87
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2
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50
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138
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if (eval "require Mo; 1") { |
88
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2
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1038
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require Mo::default; |
89
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2
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931
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require Mo::required; |
90
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2
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166
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my $M = "Mo::"; |
91
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# copied and modified from Mo 0.38 |
92
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$handle_mo = patch_package( |
93
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'Mo', 'import', 'replace', |
94
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sub { |
95
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1
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1
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7
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no strict; ### |
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1
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2
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1
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582
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96
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2
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2
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33
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import warnings; |
97
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2
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4
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$^H |= 1538; |
98
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2
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7
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my ( $P, %e, %o ) = caller . '::'; |
99
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2
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19
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shift; |
100
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1
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1
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5
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eval "no Mo::$_", &{ $M . $_ . '::e' }( $P, \%e, \%o, \@_ ) for @_; |
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1
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1
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2
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1
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1
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18
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1
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1
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68
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1
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2
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1
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16
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1
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5
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1
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1
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1
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13
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1
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74
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1
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2
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1
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13
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2
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129
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4
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17
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101
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2
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50
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86
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return if $e{M}; |
102
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%e = ( 'extends', |
103
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1
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1
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432
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sub { eval "no $_[0]()"; @{ $P . ISA } = $_[0] }, |
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1
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1
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37
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1
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10
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1
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64
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1
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2
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1
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18
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104
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'has', |
105
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sub { |
106
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3
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3
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13
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my $n = shift; |
107
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3
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5
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my $p = $P; $p =~ s/::$//; $mo_attrs{$p}{$n} = {@_}; ### |
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3
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13
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3
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11
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108
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3
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0
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0
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11
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my $m = sub { $#_ ? $_[0]{$n} = $_[1] : $_[0]{$n} }; |
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0
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0
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109
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3
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50
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8
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@_ = ( 'default', @_ ) if !( $#_ % 2 ); |
110
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3
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18
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$m = $o{$_}->( $m, $n, @_ ) for sort keys %o; |
111
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3
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75
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*{ $P . $n } = $m; |
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3
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18
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112
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}, |
113
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2
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18
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%e, |
114
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); |
115
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2
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7
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*{ $P . $_ } = $e{$_} for keys %e; |
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4
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21
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116
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2
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5
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@{ $P . ISA } = $M . Object; |
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2
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219
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117
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}, |
118
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2
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22
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); |
119
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} |
120
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# to support Mouse and Moose we'll need to let user enable it, because |
121
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# of the startup overhead |
122
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2
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139
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my $classp = $class; |
123
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2
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9
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$classp =~ s!::!/!g; $classp .= ".pm"; |
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2
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5
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124
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2
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1499
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require $classp; |
125
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} |
126
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127
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2
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50
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79428
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my $install = $args{install} // 1; |
128
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129
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2
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50
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15
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my $fqname = $args{name} // 'noname'; |
130
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2
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50
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33
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10
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return [400, "Please specify 'name'"] unless $fqname || !$install; |
131
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2
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9
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my @caller = caller(); |
132
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2
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4
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my ($package, $uqname); |
133
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2
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50
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11
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if ($fqname =~ /(.+)::(.+)/) { |
134
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0
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0
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$package = $1; |
135
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0
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0
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$uqname = $2; |
136
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} else { |
137
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2
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33
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10
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$package = $args{package} // $caller[0]; |
138
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2
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4
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$uqname = $fqname; |
139
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2
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6
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$fqname = "$package\::$uqname"; |
140
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} |
141
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142
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2
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4
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my %func_args; |
143
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{ |
144
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2
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4
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my $doit; |
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2
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3
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145
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$doit = sub { |
146
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1
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1
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5
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no strict 'refs'; |
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1
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1
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1
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259
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147
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6
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6
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15
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my $pkg = shift; |
148
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6
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100
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41
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my $ass = $mo_attrs{$pkg} // |
149
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$Moo::MAKERS{$pkg}{constructor}{attribute_specs}; |
150
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6
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100
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15
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if ($ass) { |
151
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4
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11
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for my $k (keys %$ass) { |
152
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8
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13
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my $v = $ass->{$k}; |
153
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8
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100
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30
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my $as = { |
154
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req => $v->{required} ? 1:0, |
155
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}; |
156
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8
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100
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23
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if (exists $v->{default}) { |
157
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2
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50
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7
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if (ref($v->{default}) eq 'CODE') { |
158
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0
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0
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$as->{default} = $v->{default}->(); |
159
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} else { |
160
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2
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5
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$as->{default} = $v->{default}; |
161
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} |
162
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} |
163
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8
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25
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$func_args{$k} = $as; |
164
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} |
165
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} |
166
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6
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12
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$doit->($_) for @{"$pkg\::ISA"}; |
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6
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50
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167
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2
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13
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}; |
168
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2
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7
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$doit->($class); |
169
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} |
170
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171
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2
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18
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my $meta = { |
172
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v => 1.1, |
173
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(summary => $args{summary}) x !!$args{summary}, |
174
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(description => $args{description}) x !!$args{description}, |
175
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args => \%func_args, |
176
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result_naked => 1, |
177
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}; |
178
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179
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my $func = sub { |
180
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1
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1
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5
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no strict 'refs'; |
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1
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2
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1
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91
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181
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2
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2
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4978
|
my %func_args = @_; |
182
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2
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20
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my $obj = $class->new(%func_args); |
183
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2
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my @meth_args; |
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if ($args{method_args}) { |
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} |
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}; |
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if ($install) { |
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no strict 'refs'; |
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no warnings; |
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#$log->tracef("Installing function as %s ...", $fqname); |
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*{ $fqname } = $func; |
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${$package . "::SPEC"}{$uqname} = $meta; |
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} |
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return [200, "OK", {meta=>$meta, func=>$func}]; |
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} |
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1; |
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# ABSTRACT: Generate function (and its Rinci metadata) from a class |
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__END__ |
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=pod |
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=encoding UTF-8 |
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=head1 NAME |
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Perinci::Sub::Gen::FromClass - Generate function (and its Rinci metadata) from a class |
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=head1 VERSION |
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This document describes version 0.02 of Perinci::Sub::Gen::FromClass (from Perl distribution Perinci-Sub-Gen-FromClass), released on 2014-08-04. |
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=head1 SYNOPSIS |
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Given a Mo/Moo/Mouse/Moose class: |
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# MyClass |
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use Moo; |
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has attr1 => (is => 'ro', required=>1); |
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has attr2 => (is => 'rw'); |
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sub do_this { ... } |
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sub do_that { ... } |
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1; |
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you can generate a function for it: |
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use Perinci::Sub::Gen::FromClass qw(gen_func_from_class); |
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gen_func_from_class( |
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name => 'do_this', |
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class => 'MyClass', |
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type => 'Moo', |
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method => 'do_this', |
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method_args => [3, 4, 5], # optional |
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); |
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then if you call this function: |
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do_this(attr1=>1, attr2=>2); |
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it will do something like (instantiate class and call a method): |
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MyClass->new(attr1=>1, attr2=>2)->do_this(3, 4, 5); |
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=head1 DESCRIPTION |
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Sometimes some module annoyingly only provides OO interface like: |
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my $obj = Foo->new(arg1=>1, arg2=>2); |
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$obj->some_action; |
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when it could very well just be: |
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some_action(arg1=>1, arg2=>2); |
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This module helps you create that function from a class. |
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=head1 FUNCTIONS |
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=head2 gen_func_from_class(%args) -> [status, msg, result, meta] |
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Generate function from a class. |
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C<gen_func_from_class> will create a function and Rinci metadata from a |
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{Mo,Moo,Moose,Mouse} class. Given a class like this: |
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# MyClass |
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use Moo; |
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has attr1 => (is => 'ro', required=>1); |
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has attr2 => (is => 'rw'); |
277
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sub meth1 { ... } |
278
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sub meth2 { ... } |
279
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1; |
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281
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will create a function that does something like this (it will basically |
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instantiate a class, set its attributes, and call a method): |
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284
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MyClass->new(attr1=>..., attr2=>...)->meth1; |
285
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286
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along with Rinci metadata like this: |
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288
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{ |
289
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v => 1.1, |
290
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args => { |
291
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attr1 => { req=>1, schema=>'any' }, |
292
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attr2 => { schema=>'any' }, |
293
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}, |
294
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} |
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296
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Currently only Mo- and Moo-based class is supported. Support for other Mo* |
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family members will be added. |
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299
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Arguments ('*' denotes required arguments): |
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301
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=over 4 |
302
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303
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=item * B<class>* => I<any> |
304
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305
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Class name, will be loaded with require(). |
306
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307
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=item * B<description> => I<str> |
308
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309
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Generated function's description. |
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311
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=item * B<install> => I<bool> (default: 1) |
312
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313
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Whether to install generated function (and metadata). |
314
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315
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By default, generated function will be installed to the specified (or caller's) |
316
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package, as well as its generated metadata into %SPEC. Set this argument to |
317
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false to skip installing. |
318
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319
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=item * B<method>* => I<any> |
320
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321
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Method of class to call. |
322
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323
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=item * B<method_args> => I<array> |
324
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325
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=item * B<name> => I<str> |
326
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327
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Generated function's name, e.g. `myfunc`. |
328
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329
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=item * B<package> => I<str> |
330
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331
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Generated function's package, e.g. `My::Package`. |
332
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333
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This is needed mostly for installing the function. You usually don't need to |
334
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|
|
supply this if you set C<install> to false. |
335
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336
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If not specified, caller's package will be used by default. |
337
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338
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=item * B<summary> => I<str> |
339
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340
|
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|
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Generated function's summary. |
341
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342
|
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|
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=back |
343
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344
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Return value: |
345
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346
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Returns an enveloped result (an array). |
347
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348
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First element (status) is an integer containing HTTP status code |
349
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|
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(200 means OK, 4xx caller error, 5xx function error). Second element |
350
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(msg) is a string containing error message, or 'OK' if status is |
351
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|
200. Third element (result) is optional, the actual result. Fourth |
352
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element (meta) is called result metadata and is optional, a hash |
353
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that contains extra information. |
354
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355
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A hash containing generated function, metadata (hash) |
356
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357
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|
|
=head1 TODO |
358
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359
|
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|
|
Translate C<isa> option in C<has> into argument schema. |
360
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361
|
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|
|
=head1 SEE ALSO |
362
|
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|
363
|
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|
|
|
|
L<Rinci> |
364
|
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365
|
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|
|
=head1 HOMEPAGE |
366
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367
|
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|
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|
|
Please visit the project's homepage at L<https://metacpan.org/release/Perinci-Sub-Gen-FromClass>. |
368
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369
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|
|
=head1 SOURCE |
370
|
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371
|
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|
|
Source repository is at L<https://github.com/sharyanto/perl-Perinci-Sub-Gen-FromClass>. |
372
|
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373
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|
|
=head1 BUGS |
374
|
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|
|
|
375
|
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|
|
|
|
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Perinci-Sub-Gen-FromClass> |
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377
|
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|
|
When submitting a bug or request, please include a test-file or a |
378
|
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|
|
patch to an existing test-file that illustrates the bug or desired |
379
|
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|
feature. |
380
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381
|
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|
|
=head1 AUTHOR |
382
|
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|
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383
|
|
|
|
|
|
|
Steven Haryanto <stevenharyanto@gmail.com> |
384
|
|
|
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|
|
385
|
|
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|
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|
|
=head1 COPYRIGHT AND LICENSE |
386
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|
|
387
|
|
|
|
|
|
|
This software is copyright (c) 2014 by Steven Haryanto. |
388
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389
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This is free software; you can redistribute it and/or modify it under |
390
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|
|
the same terms as the Perl 5 programming language system itself. |
391
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392
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=cut |