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package Params::Validate::Array; |
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use 5.008008; |
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use strict; |
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use warnings; |
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use base qw( Exporter ); |
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use vars qw($VERSION @EXPORT @EXPORT_OK %EXPORT_TAGS $DOC); |
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our $VERSION = '0.03'; |
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use Params::Validate (); |
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use Carp qw(confess); |
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# copy Params::Validate's EXPORT* constants |
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@EXPORT = @Params::Validate::EXPORT; |
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@EXPORT_OK = @Params::Validate::EXPORT_OK; |
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%EXPORT_TAGS = %Params::Validate::EXPORT_TAGS; |
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sub import { |
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# import all of P::V except validate() and validation_options() |
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Params::Validate->import( |
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grep { $_ ne 'validate' and |
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$_ ne 'validation_options' } @Params::Validate::EXPORT_OK |
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); |
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# now export all that P::V would have exported |
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__PACKAGE__->export_to_level(1, @_); |
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} |
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Params::Validate::validation_options(stack_skip => 2); |
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sub validate(\@$) { |
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my $a = $_[0]; |
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my $spec = $_[1]; |
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return Params::Validate::validate(@$a, $spec) |
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unless ref $spec eq 'ARRAY'; |
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confess "validate(): odd number of args in specification" |
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if @$spec % 2; |
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# get the "keys", the 0th, 2nd, 4th, ... values of the @$spec array |
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my $i = 1; |
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my @keys = grep { $i++ % 2 } @$spec; |
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return @{Params::Validate::validate(@$a, { @$spec } )}{@keys}; |
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} |
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sub validation_options { |
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my %opts = @_; |
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#print "validation_options() ", join(', ', ( caller(0) )[0,3] ), "\n"; |
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#map { print "$_ => ", $opts{$_} || 'NULL', "\n"} keys %opts; |
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$opts{stack_skip}++ if exists $opts{stack_skip}; |
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Params::Validate::validation_options(%opts); |
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} |
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1; |
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=head1 NAME |
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Params::Validate::Array - provide an alternative version of Param::Validate's |
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C function which will return parameters as a list. |
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=head1 VERSION |
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Version 0.03 |
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=head1 SYNOPSIS |
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This module's C function is a replacement for the Params::Validate |
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module's C function, returning the arguments as a list, |
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and not a hash as Params::Validate::validate() does. |
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This replacement C requires the argument descriptor to be an array |
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reference, not a hash reference as in Params::Validate::validate(). |
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=head1 Examples: |
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use Params::Validate::Array qw(SCALAR ARRAYREF validate ...); |
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sub foo1 { |
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my ($a, $b, $c) = validate( @_, |
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# note the arrayref, not a hashref as in Params::Validate |
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[ a => 1, # types of a, b, & c are |
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b => 0, #+ unspecified. a is mandatory, |
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c => 0, #+ b & c optional |
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] |
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); |
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print "a = $a\n"; |
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print "b = ", $b // "undefined", "\n"; |
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print "c = ", $c // "undefined", "\n"; |
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} |
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foo1(a => 'hello', c => 'there'); |
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# prints: |
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# a = hello |
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# b = undefined |
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# c = there |
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108
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foo1(b => 1, c => 'foo'); |
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# throws error: |
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# "Mandatory parameter 'a' missing in call to main::foo1 ..." |
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112
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} |
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114
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sub foo2 { |
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my ($x, $y) = validate( @_, |
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# arrayref, not hashref |
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[ x => {type => HASHREF, optional => 1}, # hashref 'x' is optional, |
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y => {type => SCALAR }, #+ scalar 'y' mandatory |
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] |
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); |
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$x->{$y} = 'foo' |
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if defined $x; |
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} |
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126
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Note that if this module's C function is called with |
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a hashref argument descriptor, the behaviour reverts to that of |
128
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Params::Validate::validate(): |
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130
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use Params::Validate::Array qw(SCALAR HASHREF validate); |
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132
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sub foo3 { |
133
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my %arg = validate( @_, |
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# Note hashref |
135
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{ x => {type => HASHREF, optional => 1}, |
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y => {type => SCALAR }, |
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} |
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); |
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140
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print "y arg is ", $arg{y}, "\n"; |
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... |
142
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} |
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144
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145
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=head1 EXPORT |
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147
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Params::Validate::Array exports everything that Params::Validate |
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does, including C and C by default. The |
149
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functions C and C as well as |
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constants C, C, etc are also available for export. See |
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L for details. |
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153
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Only the behaviour of C is changed, and only when the argument |
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descriptor is an arrayref. All other routines are identical to those in |
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Params::Validate (Except for C which will increment any stack_skip => ... |
156
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argument to hide the extra layer of call stack). |
157
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158
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=head1 SUBROUTINES/METHODS |
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160
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B ]);> |
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162
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In contrast to the C subroutine in L, |
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which is called as: |
164
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165
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my %args = validate(@_, { ... } ); |
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167
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(where the hashref argument C<{...}> is a descriptor for the subroutine |
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arguments to be validated), the C |
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subroutine in this package is called as |
170
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171
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my ($arg1, $arg2, ...) = validate(@_, [ ... ] ); |
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173
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where the contents of the descriptor C<[...]> are identical to those in the |
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hashref descriptor C<{...}> of the Params::Validate call. |
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176
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In fact Params::Validate::Array::validate() is little more than a wrapper, and |
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uses Params::Validate::validate() to do all the hard work. |
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179
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=head1 AUTHOR |
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181
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Sam Brain, C<< >> |
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183
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=head1 BUGS |
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185
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Please report any bugs or feature requests to |
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C, or through the web interface at |
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L. I will be |
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notified, and then you'll automatically be notified of progress on your |
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bug as I make changes. |
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191
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=head1 ACKNOWLEDGEMENTS |
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193
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Thanks to Dave Rolsky for the L and |
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L modules, whose perl code and test suites I plagiarized |
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shamelessly for this module. |
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197
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=head1 LICENSE AND COPYRIGHT |
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199
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Copyright 2011 Sam Brain. |
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201
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This program is free software; you can redistribute it and/or modify it |
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under the terms of either: the GNU General Public License as published |
203
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by the Free Software Foundation; or the Artistic License. |
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205
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See http://dev.perl.org/licenses/ for more information. |
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207
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=cut |
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209
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##### SUBROUTINE INDEX ##### |
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# # |
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# gen by index_subs.pl # |
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# on 14 Mar 2014 21:53 # |
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# # |
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############################ |
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216
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217
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####### Packages ########### |
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219
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# Params::Validate::Array ..................... 1 |
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# foo1 ...................................... 2 |
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# foo2 ...................................... 2 |
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# foo3 ...................................... 3 |
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# import .................................... 1 |
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# validate .................................. 1 |
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# validation_options ........................ 1 |
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