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1 | package Data::Dumper::Concise::Sugar; |
2 | |
3 | use 5.006; |
4 | |
5 | use Exporter (); |
6 | use Data::Dumper::Concise (); |
7 | |
8 | BEGIN { @ISA = qw(Exporter) } |
9 | |
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10 | @EXPORT = qw($Dwarn $DwarnN Dwarn DwarnS DwarnL DwarnN DwarnF); |
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11 | |
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12 | sub Dwarn { return DwarnL(@_) if wantarray; DwarnS($_[0]) } |
13 | |
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14 | our $Dwarn = \&Dwarn; |
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15 | our $DwarnN = \&DwarnN; |
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16 | |
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17 | sub DwarnL { warn Data::Dumper::Concise::Dumper @_; @_ } |
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18 | |
19 | sub DwarnS ($) { warn Data::Dumper::Concise::Dumper $_[0]; $_[0] } |
20 | |
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21 | sub DwarnN ($) { |
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22 | require Devel::ArgNames; |
23 | my $x = Devel::ArgNames::arg_names(); |
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24 | warn(($x?$x:'(anon)') . ' => ' . Data::Dumper::Concise::Dumper $_[0]); $_[0] |
25 | } |
26 | |
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27 | sub DwarnF (&@) { my $c = shift; warn &Data::Dumper::Concise::DumperF($c, @_); @_ } |
28 | |
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29 | =head1 NAME |
30 | |
31 | Data::Dumper::Concise::Sugar - return Dwarn @return_value |
32 | |
33 | =head1 SYNOPSIS |
34 | |
35 | use Data::Dumper::Concise::Sugar; |
36 | |
37 | return Dwarn some_call(...) |
38 | |
39 | is equivalent to: |
40 | |
41 | use Data::Dumper::Concise; |
42 | |
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43 | if (wantarray) { |
44 | my @return = some_call(...); |
45 | warn Dumper(@return); |
46 | return @return; |
47 | } else { |
48 | my $return = some_call(...); |
49 | warn Dumper($return); |
50 | return $return; |
51 | } |
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52 | |
53 | but shorter. If you need to force scalar context on the value, |
54 | |
55 | use Data::Dumper::Concise::Sugar; |
56 | |
57 | return DwarnS some_call(...) |
58 | |
59 | is equivalent to: |
60 | |
61 | use Data::Dumper::Concise; |
62 | |
63 | my $return = some_call(...); |
64 | warn Dumper($return); |
65 | return $return; |
66 | |
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67 | If you need to force list context on the value, |
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68 | |
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69 | use Data::Dumper::Concise::Sugar; |
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70 | |
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71 | return DwarnL some_call(...) |
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72 | |
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73 | is equivalent to: |
74 | |
75 | use Data::Dumper::Concise; |
76 | |
77 | my @return = some_call(...); |
78 | warn Dumper(@return); |
79 | return @return; |
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80 | |
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81 | If you want to label your output, try DwarnN |
82 | |
83 | use Data::Dumper::Concise::Sugar; |
84 | |
85 | return DwarnN $foo |
86 | |
87 | is equivalent to: |
88 | |
89 | use Data::Dumper::Concise; |
90 | |
91 | my @return = some_call(...); |
92 | warn '$foo => ' . Dumper(@return); |
93 | return @return; |
94 | |
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95 | If you want to output a reference returned by a method easily, try $Dwarn |
96 | |
97 | $foo->bar->{baz}->$Dwarn |
98 | |
99 | is equivalent to: |
100 | |
101 | my $return = $foo->bar->{baz}; |
102 | warn Dumper($return); |
103 | return $return; |
104 | |
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105 | If you want to format the output of your data structures, try DwarnF |
106 | |
107 | my ($a, $c) = DwarnF { "awesome: $_[0] not awesome: $_[1]" } $awesome, $cheesy; |
108 | |
109 | is equivalent to: |
110 | |
111 | my @return = ($awesome, $cheesy); |
112 | warn DumperF { "awesome: $_[0] not awesome: $_[1]" } $awesome, $cheesy; |
113 | return @return; |
114 | |
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115 | =head1 DESCRIPTION |
116 | |
117 | use Data::Dumper::Concise::Sugar; |
118 | |
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119 | will import Dwarn, $Dwarn, DwarnL, DwarnN, and DwarnS into your namespace. Using |
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120 | L<Exporter>, so see its docs for ways to make it do something else. |
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121 | |
122 | =head2 Dwarn |
123 | |
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124 | sub Dwarn { return DwarnL(@_) if wantarray; DwarnS($_[0]) } |
125 | |
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126 | =head2 $Dwarn |
127 | |
128 | $Dwarn = \&Dwarn |
129 | |
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130 | =head2 $DwarnN |
131 | |
132 | $DwarnN = \&DwarnN |
133 | |
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134 | =head2 DwarnL |
135 | |
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136 | sub Dwarn { warn Data::Dumper::Concise::Dumper @_; @_ } |
137 | |
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138 | =head2 DwarnS |
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139 | |
140 | sub DwarnS ($) { warn Data::Dumper::Concise::Dumper $_[0]; $_[0] } |
141 | |
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142 | =head2 DwarnN |
143 | |
144 | sub DwarnN { warn '$argname => ' . Data::Dumper::Concise::Dumper $_[0]; $_[0] } |
145 | |
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146 | B<Note>: this requires L<Devel::ArgNames> to be installed. |
147 | |
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148 | =head2 DwarnF |
149 | |
150 | sub DwarnF (&@) { my $c = shift; warn &Data::Dumper::Concise::DumperF($c, @_); @_ } |
151 | |
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152 | =head1 TIPS AND TRICKS |
153 | |
154 | =head2 global usage |
155 | |
156 | Instead of always just doing: |
157 | |
158 | use Data::Dumper::Concise::Sugar; |
159 | |
160 | Dwarn ... |
161 | |
162 | We tend to do: |
163 | |
164 | perl -MData::Dumper::Concise::Sugar foo.pl |
165 | |
166 | (and then in the perl code:) |
167 | |
168 | ::Dwarn ... |
169 | |
170 | That way, if you leave them in and run without the |
171 | C<< use Data::Dumper::Concise::Sugar >> the program will fail to compile and |
172 | you are less likely to check it in by accident. Furthmore it allows that |
173 | much less friction to add debug messages. |
174 | |
175 | =head2 method chaining |
176 | |
177 | One trick which is useful when doing method chaining is the following: |
178 | |
179 | my $foo = Bar->new; |
180 | $foo->bar->baz->Data::Dumper::Concise::Sugar::DwarnS->biff; |
181 | |
182 | which is the same as: |
183 | |
184 | my $foo = Bar->new; |
185 | (DwarnS $foo->bar->baz)->biff; |
186 | |
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187 | =head1 SEE ALSO |
188 | |
189 | You probably want L<Devel::Dwarn>, it's the shorter name for this module. |
190 | |
191 | =cut |
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192 | |
193 | 1; |