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scripts/generate_index.pl view on Meta::CPAN
size: 12,
weight: 'bold'
}
}
}, tooltip: {
callbacks: {
label: function(context) {
const raw = context.raw;
const coverage = raw.y.toFixed(1);
const delta = raw.delta?.toFixed(1) ?? '0.0';
const sign = delta > 0 ? '+' : delta < 0 ? '-' : '±';
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=back
=head2 Associating behavior with Data::Regions
The following methods allow you to associate data and callbacks to a
tree of Data::Regions, and to request a Data::Region to perform its tree of
callbacks.
=over 4
=item $r->data( [$reference] )
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lib/Data/SExpression.pm view on Meta::CPAN
return !ref($thing) ||
ref($thing) eq "GLOB" ||
ref($thing) eq 'Data::SExpression::Symbol';;
}
=head1 Data::SExpression::Parser callbacks
These are for internal use only, and are used to generate the data
structures returned by L</read>.
=head2 new_cons CAR CDR
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xt/author/pod_spelling_system.t view on Meta::CPAN
TODO
filename
filenames
login
callback
callbacks
standalone
VMS
hostname
hostnames
TCP
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xt/author/pod_spelling_system.t view on Meta::CPAN
TODO
filename
filenames
login
callback
callbacks
standalone
VMS
hostname
hostnames
TCP
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xt/author/pod_spelling_system.t view on Meta::CPAN
TODO
filename
filenames
login
callback
callbacks
standalone
VMS
hostname
hostnames
TCP
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t/ExtUtils/SVDmaker/Algorithm/Diff.pm view on Meta::CPAN
In addition to the
C<DISCARD_A>,
C<DISCARD_B>, and
C<MATCH>
callbacks supported by C<traverse_sequences>, C<traverse_balanced> supports
a C<CHANGE> callback indicating that one element got C<replaced> by another:
traverse_sequences( \@seq1, \@seq2,
{ MATCH => $callback_1,
DISCARD_A => $callback_2,
t/ExtUtils/SVDmaker/Algorithm/Diff.pm view on Meta::CPAN
sub traverse_sequences
{
my $a = shift; # array ref
my $b = shift; # array ref
my $callbacks = shift || {};
my $keyGen = shift;
my $matchCallback = $callbacks->{'MATCH'} || sub { };
my $discardACallback = $callbacks->{'DISCARD_A'} || sub { };
my $finishedACallback = $callbacks->{'A_FINISHED'};
my $discardBCallback = $callbacks->{'DISCARD_B'} || sub { };
my $finishedBCallback = $callbacks->{'B_FINISHED'};
my $matchVector = _longestCommonSubsequence( $a, $b, $keyGen, @_ );
# Process all the lines in @$matchVector
my $lastA = $#$a;
my $lastB = $#$b;
t/ExtUtils/SVDmaker/Algorithm/Diff.pm view on Meta::CPAN
sub traverse_balanced
{
my $a = shift; # array ref
my $b = shift; # array ref
my $callbacks = shift || {};
my $keyGen = shift;
my $matchCallback = $callbacks->{'MATCH'} || sub { };
my $discardACallback = $callbacks->{'DISCARD_A'} || sub { };
my $discardBCallback = $callbacks->{'DISCARD_B'} || sub { };
my $changeCallback = $callbacks->{'CHANGE'};
my $matchVector = _longestCommonSubsequence( $a, $b, $keyGen, @_ );
# Process all the lines in match vector
my $lastA = $#$a;
my $lastB = $#$b;
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TableAutoSum.pm view on Meta::CPAN
return 1;
}
use constant ROW_COL_TYPE => {
type => SCALAR | ARRAYREF,
callbacks => {
# scalar value
'integer' => sub { implies !ref($_[0]) => $_[0] =~ $RE{num}{int} },
'greater than 0' => sub { implies !ref($_[0]) => ($_[0] =~ $RE{num}{int}) && (int($_[0]) > 0) },
# array ref
TableAutoSum.pm view on Meta::CPAN
sub data : lvalue {
my $self = shift;
my ($row, $col, $value) = validate_pos( @_,
{type => SCALAR,
callbacks => {'is a row' => sub {$self->{rowset}->contains(shift())}}
},
{type => SCALAR,
callbacks => {'is a col' => sub {$self->{colset}->contains(shift())}}
},
0
);
$self->{data}->{$row}->{$col} = $value if defined $value;
$self->{data}->{$row}->{$col};
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lib/Data/TableReader/Decoder/HTML.pm view on Meta::CPAN
=head1 METHODS
=head2 parse
Unfortunately, I'm not aware of any HTML parsers that properly parse a stream on demand rather
than using callbacks, so this module simply parses all the HTML up-front and iterates the perl
data structure. This would be a problem if you have more HTML than can fit into memory
comfortably. Buf if that's the case, you have bigger problems ;-)
This method is called automatically the first time you invoke the iterator. You might choose
to call it earlier in order to report errors better.
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- Decoder::Mock now correctly handles empty tables (no rows)
Version 0.020 - 2024-04-30
- Rename on_validation_fail -> on_validation_error
The action codes are the same, but the callback has different arguments.
Old callbacks applied using the attribute name 'on_validation_fail' will
continue to work.
- New iterator attribute 'dataset_idx', for keeping track of which dataset
you're on.
- Unimplemented Iterator->seek now dies as per the documentation.
(no built-in iterator lacked support for seek, so unlikely to matter)
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scripts/generate_index.pl view on Meta::CPAN
size: 12,
weight: 'bold'
}
}
}, tooltip: {
callbacks: {
label: function(context) {
const raw = context.raw;
const coverage = raw.y.toFixed(1);
const delta = raw.delta?.toFixed(1) ?? '0.0';
const sign = delta > 0 ? '+' : delta < 0 ? '-' : '±';
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lib/Data/Tie/Watch.pm view on Meta::CPAN
Note: This is a copy of Tk's Tie::Watch.
Copied to avoid the Tk depedency.
This class module binds one or more subroutines of your devising to a
Perl variable. All variables can have B<FETCH>, B<STORE> and
B<DESTROY> callbacks. Additionally, arrays can define B<CLEAR>,
B<DELETE>, B<EXISTS>, B<EXTEND>, B<FETCHSIZE>, B<POP>, B<PUSH>,
B<SHIFT>, B<SPLICE>, B<STORESIZE> and B<UNSHIFT> callbacks, and hashes
can define B<CLEAR>, B<DELETE>, B<EXISTS>, B<FIRSTKEY> and B<NEXTKEY>
callbacks. If these term are unfamiliar to you, I I<really> suggest
you read L<perltie>.
With Data::Tie::Watch you can:
. alter a variable's value
lib/Data/Tie/Watch.pm view on Meta::CPAN
Callback format is patterned after the Perl/Tk scheme: supply either a
code reference, or, supply an array reference and pass the callback
code reference in the first element of the array, followed by callback
arguments. (See examples in the Synopsis, above.)
Tie::Watch provides default callbacks for any that you fail to
specify. Other than negatively impacting performance, they perform
the standard action that you'd expect, so the variable behaves
"normally". Once you override a default callback, perhaps to insert
debug code like print statements, your callback normally finishes by
calling the underlying (overridden) method. But you don't have to!
lib/Data/Tie/Watch.pm view on Meta::CPAN
Watch constructor.
The *real* constructor is Data::Tie::Watch->base_watch(),
invoked by methods in other Watch packages, depending upon the variable's
type. Here we supply defaulted parameter values and then verify them,
normalize all callbacks and bind the variable to the appropriate package.
The watchpoint constructor method that accepts option/value pairs to
create and configure the Watch object. The only required option is
B<-variable>.
lib/Data/Tie/Watch.pm view on Meta::CPAN
$watch_obj->{-value} = $$variable;
bless $watch_obj, $class;
}
# Default scalar callbacks.
sub Destroy { undef %{ $_[0] } }
sub Fetch { $_[0]->{-value} }
sub Store { $_[0]->{-value} = $_[1] }
lib/Data/Tie/Watch.pm view on Meta::CPAN
my $watch_obj = Data::Tie::Watch->base_watch( %args );
bless $watch_obj, $class;
}
# Default array callbacks.
sub Clear { $_[0]->{-ptr} = () }
sub Delete { delete $_[0]->{-ptr}->[ $_[1] ] }
sub Destroy { undef %{ $_[0] } }
sub Exists { exists $_[0]->{-ptr}->[ $_[1] ] }
lib/Data/Tie/Watch.pm view on Meta::CPAN
my $watch_obj = Data::Tie::Watch->base_watch( %args );
bless $watch_obj, $class;
}
# Default hash callbacks.
sub Clear { $_[0]->{-ptr} = () }
sub Delete { delete $_[0]->{-ptr}->{ $_[1] } }
sub Destroy { undef %{ $_[0] } }
sub Exists { exists $_[0]->{-ptr}->{ $_[1] } }
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lib/Data/Transformer.pm view on Meta::CPAN
'My::Class' => sub { shift->set_foo('bar') }
);
=head1 DESCRIPTION
=head2 Data type callbacks
The basic idea is that you provide a callback subroutine for each type
of data that you wish to affect or collect information from.
The constructor, C<new()>, expects a hash with at least one of the
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TreeDumper.pm view on Meta::CPAN
if this option is set, B<Data::TreeDumper> will use it instead for the console width.
=head1 Custom Rendering
B<Data::TreeDumper> has a plug-in interface for other rendering formats. The renderer callbacks are
set by overriding the native renderer. Thanks to Stevan Little author of Tree::Simple::View for getting
B<Data::TreeDumper> on this track. Check B<Data::TreeDumper::Renderer::DHTML>.
DumpTree
(
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lib/Data/Validator.pm view on Meta::CPAN
If it is a CODE reference, it is called in scalar context as
C<< $default->($validator, $rule, $args) >> and its return value
is used as a default value.
Because arguments are validated in the order of definitions, C<default>
callbacks can rely on the previously-filled values:
my $v = Data::Validator->new(
foo => { default => 99 },
bar => { default => sub {
my($validator, $this_rule, $args) = @_;
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the field.
* Result's value is no longer serialized.
0.10
* Change post_check's calling convention after reading some wisdom from
nuffin: http://blog.woobling.org/2009/09/method-style-callbacks.html
* Change internal API to use a field class rather than a bunch of hashes.
0.09
* Document check order
* Clean up post-check test a bit
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lib/Data/Visitor/Callback.pm view on Meta::CPAN
package Data::Visitor::Callback;
use Moose;
# ABSTRACT: A Data::Visitor with callbacks.
our $VERSION = '0.32';
use Data::Visitor ();
use Carp qw(carp);
lib/Data/Visitor/Callback.pm view on Meta::CPAN
use constant DEBUG => Data::Visitor::DEBUG();
use constant FIVE_EIGHT => ( $] >= 5.008 );
extends qw(Data::Visitor);
has callbacks => (
isa => "HashRef",
is => "rw",
default => sub { {} },
);
has class_callbacks => (
isa => "ArrayRef",
is => "rw",
default => sub { [] },
);
lib/Data/Visitor/Callback.pm view on Meta::CPAN
my $args = $class->SUPER::BUILDARGS(@args);
my %init_args = map { $_->init_arg => undef } $class->meta->get_all_attributes;
my %callbacks = map { $_ => $args->{$_} } grep { not exists $init_args{$_} } keys %$args;
my @class_callbacks = do {
no strict 'refs';
grep {
# this check can be half assed because an ->isa check will be
# performed later. Anything that cold plausibly be a class name
# should be included in the list, even if the class doesn't
# actually exist.
m{ :: | ^[A-Z] }x # if it looks kinda lack a class name
or
scalar keys %{"${_}::"} # or it really is a class
} keys %callbacks;
};
# sort from least derived to most derived
@class_callbacks = sort { !$a->isa($b) <=> !$b->isa($a) } @class_callbacks;
return {
%$args,
callbacks => \%callbacks,
class_callbacks => \@class_callbacks,
};
}
sub visit {
my $self = shift;
lib/Data/Visitor/Callback.pm view on Meta::CPAN
$data = $self->callback_and_reg( object => $data );
my $class_cb = 0;
foreach my $class ( grep { $data->isa($_) } @{ $self->class_callbacks } ) {
last unless blessed($data);
die "Unexpected object $data found"
unless $data->isa($class);
$self->trace( flow => class_callback => $class, on => $data ) if DEBUG;
lib/Data/Visitor/Callback.pm view on Meta::CPAN
}
sub callback {
my ( $self, $name, $data, @args ) = @_;
if ( my $code = $self->callbacks->{$name} ) {
$self->trace( flow => callback => $name, on => $data ) if DEBUG;
if ( wantarray ) {
my @ret = $self->$code( $data, @args );
return $self->ignore_return_values ? ( $data, @args ) : @ret;
} else {
lib/Data/Visitor/Callback.pm view on Meta::CPAN
=encoding UTF-8
=head1 NAME
Data::Visitor::Callback - A Data::Visitor with callbacks.
=head1 VERSION
version 0.32
=head1 SYNOPSIS
use Data::Visitor::Callback;
my $v = Data::Visitor::Callback->new(
# you can provide callbacks
# $_ will contain the visited value
value => sub { ... },
array => sub { ... },
lib/Data/Visitor/Callback.pm view on Meta::CPAN
# 'visit_ref' callback which normally traverse unblessed references
object => "visit_ref",
# you can also use class names as callbacks
# the callback will be invoked on all objects which inherit that class
'Some::Class' => sub {
my ( $v, $obj ) = @_; # $v is the visitor
lib/Data/Visitor/Callback.pm view on Meta::CPAN
$v->visit( $some_perl_value );
=head1 DESCRIPTION
This is a L<Data::Visitor> subclass that lets you invoke callbacks instead of
needing to subclass yourself.
=head1 METHODS
=over 4
=item new %opts, %callbacks
Construct a new visitor.
The options supported are:
=over 4
=item ignore_return_values
When this is true (off by default) the return values from the callbacks are
ignored, thus disabling the fmapping behavior as documented in
L<Data::Visitor>.
This is useful when you want to modify $_ directly
lib/Data/Visitor/Callback.pm view on Meta::CPAN
=back
=head1 CALLBACKS
Use these keys for the corresponding callbacks.
The callback is in the form:
sub {
my ( $visitor, $data ) = @_;
lib/Data/Visitor/Callback.pm view on Meta::CPAN
You can use any class name as a callback. This is called only after the
C<object> callback.
If the object C<isa> the class then the callback will fire.
These callbacks are called from least derived to most derived by comparing the
classes' C<isa> at construction time.
=item object_no_class
Called for every object that did not have a class callback.
=item object_final
The last callback called for objects, useful if you want to post process the
output of any class callbacks.
=item array
Called for array references.
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unblessed references
2005-11-14 19:23 Guido Flohr <guido.flohr@cantanea.com>
* README, lib/Data/Walk.pm, t/TC_Copy.pm, t/TS_All.pm: implemented
call-by-reference for preprocessing callbacks
2005-11-14 18:35 Guido Flohr <guido.flohr@cantanea.com>
* README, lib/Data/Walk.pm, t/TC_Follow.pm, t/TS_All.pm: handle
cyclic references correctly
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lib/Database/Abstraction.pm view on Meta::CPAN
# in scalar assignment in error_diag
# RT121127
# auto_diag => 1,
auto_diag => 0,
# Don't do this, it causes "Attempt to free unreferenced scalar"
# callbacks => {
# after_parse => sub {
# my ($csv, @rows) = @_;
# my @rc;
# foreach my $row(@rows) {
# if($row->[0] !~ /^#/) {
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scripts/generate_index.pl view on Meta::CPAN
size: 12,
weight: 'bold'
}
}
}, tooltip: {
callbacks: {
label: function(context) {
const raw = context.raw;
const coverage = raw.y.toFixed(1);
const delta = raw.delta?.toFixed(1) ?? '0.0';
const sign = delta > 0 ? '+' : delta < 0 ? '-' : '±';
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lib/Date/Holidays/PL.pm view on Meta::CPAN
# Params::Validate config
my $ValidateOpts = {
year => {
type => SCALAR,
regex => qr/^\d{4}$/,
callbacks => {
'between 1951 and 9999' => sub {
shift >= 1951
},
},
},
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lib/DateTime/Calendar/Chinese.pm view on Meta::CPAN
cycle => {
default => 1,
},
cycle_year => {
default => 1,
callbacks => {
'is between 1 and 60' => sub { $_[0] >= 1 && $_[0] <= 60 }
}
},
month => {
default => 1,
callbacks => {
'is between 1 and 12' => sub { $_[0] >= 1 && $_[0] <= 12 }
}
},
leap_month => {
default => 0,
lib/DateTime/Calendar/Chinese.pm view on Meta::CPAN
default => 1,
type => Params::Validate::SCALAR()
},
hour => {
type => Params::Validate::SCALAR(), default => 0,
callbacks => {
'is between 0 and 23' => sub { $_[0] >= 0 && $_[0] <= 23 },
},
},
minute => {
type => Params::Validate::SCALAR(), default => 0,
callbacks => {
'is between 0 and 59' => sub { $_[0] >= 0 && $_[0] <= 59 },
},
},
second => {
type => Params::Validate::SCALAR(), default => 0,
callbacks => {
'is between 0 and 61' => sub { $_[0] >= 0 && $_[0] <= 61 },
},
},
nanosecond => {
type => Params::Validate::SCALAR(), default => 0,
callbacks => {
'cannot be negative' => sub { $_[0] >= 0 },
}
},
locale => { type => Params::Validate::SCALAR() | Params::Validate::OBJECT(), optional => 1 },
language => { type => Params::Validate::SCALAR() | Params::Validate::OBJECT(), optional => 1 },
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lib/DateTime/Calendar/Discordian.pm view on Meta::CPAN
my %args = validate(
@arguments,
{
day => {
callbacks => {
q{between 1 and 73 or St. Tib's Day} => sub {
my ( $day, $opts ) = @_;
if ( $day =~ $tibsday ) {
if ( !defined $opts->{season} ) {
return 1;
lib/DateTime/Calendar/Discordian.pm view on Meta::CPAN
},
},
},
season => {
default => undef,
callbacks => {
'valid season name' => sub {
my ( $season, $opts ) = @_;
if ( defined $season ) {
return scalar grep { /((?-x)$season)/imsx }
keys %seasons;
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lib/DateTime/Calendar/FrenchRevolutionary.pm view on Meta::CPAN
use DateTime::Calendar::FrenchRevolutionary::Locale;
my $BasicValidate =
{ year => { type => SCALAR },
month => { type => SCALAR, default => 1,
callbacks =>
{ 'is between 1 and 13' =>
sub { $_[0] >= 1 && $_[0] <= 13 }
},
},
day => { type => SCALAR, default => 1,
callbacks =>
{ 'is between 1 and 30' =>
sub { $_[0] >= 1 && $_[0] <= 30 },
},
},
hour => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 9' =>
sub { $_[0] >= 0 && $_[0] <= 9 },
},
},
minute => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 99' =>
sub { $_[0] >= 0 && $_[0] <= 99 },
},
},
second => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 99' =>
sub { $_[0] >= 0 && $_[0] <= 99 },
},
},
abt_hour => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 23' =>
sub { $_[0] >= 0 && $_[0] <= 23 },
},
},
abt_minute => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 59' =>
sub { $_[0] >= 0 && $_[0] <= 59 },
},
},
abt_second => { type => SCALAR, default => 0,
callbacks =>
{ 'is between 0 and 61' =>
sub { $_[0] >= 0 && $_[0] <= 61 },
},
},
nanosecond => { type => SCALAR, default => 0,
callbacks =>
{ 'cannot be negative' =>
sub { $_[0] >= 0 },
}
},
locale => { type => SCALAR | OBJECT,
callbacks =>
{ "only 'fr', 'en', 'es' and 'it' possible" =>
sub { ($_[0] eq 'fr') or ($_[0] eq 'en')
or ($_[0] eq 'es')
or ($_[0] eq 'it')
or ref($_[0]) =~ /(?:en|es|fr|it)$/ },
lib/DateTime/Calendar/FrenchRevolutionary.pm view on Meta::CPAN
};
my $NewValidate =
{ %$BasicValidate,
time_zone => { type => SCALAR | OBJECT,
callbacks =>
{ "only 'floating' possible" =>
sub { ($_[0] eq 'floating') or ref($_[0]) and $_[0]->is_floating },
},
default => 'floating' },
};
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sub new {
my $class = shift;
my %p = validate( @_,
{ year => { type => SCALAR },
month => { type => SCALAR, default => 1,
callbacks => {
'is between 1 and 13' =>
sub { $_[0] >= 1 && $_[0] <= 13 }
}
},
day => { type => SCALAR, default => 1,
callbacks => {
'is between 1 and 30' =>
sub { $_[0] >= 1 && $_[0] <= 30 }
}
},
hour => { type => SCALAR, default => 0,
callbacks => {
'is between 0 and 23' =>
sub { $_[0] >= 0 && $_[0] <= 23 }
}
},
minute => { type => SCALAR, default => 0,
callbacks => {
'is between 0 and 59' =>
sub { $_[0] >= 0 && $_[0] <= 59 }
}
},
second => { type => SCALAR, default => 0,
callbacks => {
'is between 0 and 59' =>
sub { $_[0] >= 0 && $_[0] <= 59 }
}
},
nanosecond => { type => SCALAR, default => 0,
callbacks => {
'is between 0 and 999999999' =>
sub { $_[0] >= 0 && $_[0] <= 999999999 }
}
},
sunset => { type => OBJECT, optional => 1 },
sub set {
my $self = shift;
my %p = validate( @_,
{ year => { type => SCALAR, optional => 1 },
month => { type => SCALAR, optional => 1,
callbacks => {
'is between 1 and 13' =>
sub { $_[0] >= 1 && $_[0] <= 13 }
}
},
day => { type => SCALAR, optional => 1,
callbacks => {
'is between 1 and 30' =>
sub { $_[0] >= 1 && $_[0] <= 30 }
}
},
hour => { type => SCALAR, optional => 1,
callbacks => {
'is between 0 and 23' =>
sub { $_[0] >= 0 && $_[0] <= 23 }
}
},
minute => { type => SCALAR, optional => 1,
callbacks => {
'is between 0 and 59' =>
sub { $_[0] >= 0 && $_[0] <= 59 }
}
},
second => { type => SCALAR, optional => 1,
callbacks => {
'is between 0 and 59' =>
sub { $_[0] >= 0 && $_[0] <= 59 }
}
},
nanosecond => { type => SCALAR, optional => 1,
callbacks => {
'is between 0 and 999999999' =>
sub { $_[0] >= 0 && $_[0] <= 999999999 }
}
},
sunset => { type => OBJECT, optional => 1 },
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lib/DateTime/Calendar/Japanese.pm view on Meta::CPAN
optional => 1,
},
hour => {
type => Params::Validate::SCALAR(),
default => 1,
callbacks => { 'is between 1 and 12' =>
sub { $_[0] >= 1 && $_[0] <= 12 } }
},
hour_quarter => {
type => Params::Validate::SCALAR(),
default => 1,
callbacks => { 'is between 1 and 4' =>
sub { $_[0] >= 1 && $_[0] <= 4 } }
},
cycle => {
default => 1,
},
cycle_year => {
default => 1,
callbacks => {
'is between 1 and 60' => sub { $_[0] >= 1 && $_[0] <= 60 }
}
},
month => {
default => 1,
callbacks => {
'is between 1 and 12' => sub { $_[0] >= 1 && $_[0] <= 12 }
}
},
leap_month => {
default => 0,
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lib/DateTime/Event/Cron.pm view on Meta::CPAN
sub as_set {
# Return self as DateTime::Set
my $self = shift;
my %sparms = @_;
Carp::cluck "Recurrence callbacks overriden by ". ref $self . "\n"
if $sparms{next} || $sparms{recurrence} || $sparms{previous};
delete $sparms{next};
delete $sparms{previous};
delete $sparms{recurrence};
$sparms{next} = sub { $self->next(@_) };
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lib/DateTime/Event/NameDay.pm view on Meta::CPAN
my $self = shift;
my %p = validate( @_,
{ country => { type => SCALAR,
optional => 1,
callbacks =>
{'known day mapping' => \&_check_country }
},
date_args => { type => HASHREF,
default => {},
},
lib/DateTime/Event/NameDay.pm view on Meta::CPAN
{
my $self = shift;
my %p = validate( @_,
{ country => { type => SCALAR,
optional => 1,
callbacks =>
{'known day mapping' => \&_check_country }
},
date => { type => OBJECT,
can => 'utc_rd_values',
},
lib/DateTime/Event/NameDay.pm view on Meta::CPAN
sub get_namedays {
my $self = shift;
my %p = validate( @_,
{ country => { type => SCALAR,
optional => 1,
callbacks =>
{'known day mapping' => \&_check_country }
},
date_args => { type => HASHREF,
default => undef,
},
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lib/DateTime/Format/Builder.pm view on Meta::CPAN
When a simple single specification is given for a method, the method isn't
given a single parser directly. It's given a wrapper that will call C<on_fail>
if the single parser returns C<undef>. The single parser must return C<undef>
so that a multiple parser can work nicely and actual errors can be thrown from
any of the callbacks.
Similarly, any multiple parsers will only call C<on_fail> right at the end
when it's tried all it could.
C<on_fail> (see L<later|/on_fail>) is defined, by default, to throw an error.
Multiple parser specifications can also specify C<on_fail> with a coderef as
an argument in the options block. This will take precedence over the
inheritable and overrideable method.
That said, don't throw real errors from callbacks in multiple parser
specifications unless you really want parsing to stop right there and not try
any other parsers.
In summary: calling a B<method> will result in either a C<DateTime> object
being returned or an error being thrown (unless you've overridden C<on_fail>
lib/DateTime/Format/Builder.pm view on Meta::CPAN
parser specification.
=item * label
B<label> provides a name for the specification and is passed to some of the
callbacks about to mentioned.
=item * on_match and on_fail
B<on_match> and B<on_fail> are callbacks. Both routines will be called with
parameters of:
=over 4
=item * input
B<input> is the input to the parser (after any preprocessing callbacks).
=item * label
B<label> is the label of the parser if there is one.
lib/DateTime/Format/Builder.pm view on Meta::CPAN
This all said, I generally wouldn't recommend using this feature unless you
have to.
=head2 Callbacks
I mention a number of callbacks in this document.
Any time you see a callback being mentioned, you can, if you like, substitute
an arrayref of coderefs rather than having the straight coderef.
=head1 MULTIPLE SPECIFICATIONS
lib/DateTime/Format/Builder.pm view on Meta::CPAN
=back
=head1 EXECUTION FLOW
Builder allows you to plug in a fair few callbacks, which can make following
how a parse failed (or succeeded unexpectedly) somewhat tricky.
=head2 For Single Specifications
A single specification will do the following:
lib/DateTime/Format/Builder.pm view on Meta::CPAN
L<DateTime::Format::W3CDTF> and the encouragement to rewrite these docs almost
100%!
Claus Färber (CFAERBER) for having me get around to fixing the
auto-constructor writing, providing the 'args'/'self' patch, and suggesting
the multi-callbacks.
Rick Measham (RICKM) for L<DateTime::Format::Strptime> which Builder now
supports.
Matthew McGillis for pointing out that C<on_fail> overriding should be
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lib/DateTime/Format/Epoch.pm view on Meta::CPAN
sub new {
my $class = shift;
my %p = validate( @_,
{ epoch => {type => OBJECT,
can => 'utc_rd_values'},
unit => {callbacks =>
{'valid unit' =>
sub { exists $units_per_second{$_[0]}
or $_[0] > 0 }},
default => 'seconds'},
type => {regex => qr/^(?:int|float|bigint)$/,
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