1=head1 NAME 2 3PPIx::Regexp::Token::Whitespace - Represent whitespace 4 5=head1 SYNOPSIS 6 7 use PPIx::Regexp::Dumper; 8 PPIx::Regexp::Dumper->new( 'qr{ foo }smx' ) 9 ->print(); 10 11=head1 INHERITANCE 12 13C<PPIx::Regexp::Token::Whitespace> is a 14L<PPIx::Regexp::Token::NoOp|PPIx::Regexp::Token::NoOp>. 15 16C<PPIx::Regexp::Token::Whitespace> has no descendants. 17 18=head1 DESCRIPTION 19 20This class represents whitespace. It will appear inside the regular 21expression only if the C</x> modifier is present, but it may also appear 22between the type and the opening delimiter (e.g. C<qr {foo}>) or after 23the regular expression in a bracketed substitution (e.g. C<s{foo} 24{bar}>). 25 26If the C</xx> modifier is present, it can also appear inside bracketed 27character classes. This was introduced in Perl 5.25.9. 28 29=head1 METHODS 30 31This class provides no public methods beyond those provided by its 32superclass. 33 34=cut 35 36package PPIx::Regexp::Token::Whitespace; 37 38use strict; 39use warnings; 40 41use base qw{ PPIx::Regexp::Token::NoOp }; 42 43use PPIx::Regexp::Constant qw{ 44 COOKIE_REGEX_SET 45 MINIMUM_PERL 46 @CARP_NOT 47}; 48 49our $VERSION = '0.082'; 50 51sub __new { 52 my ( $class, $content, %arg ) = @_; 53 54 defined $arg{perl_version_introduced} 55 or $arg{perl_version_introduced} = 56 ( grep { 127 < ord } split qr{}, $content ) 57 ? '5.021001' 58 : MINIMUM_PERL; 59 60 return $class->SUPER::__new( $content, %arg ); 61} 62 63sub explain { 64 my ( $self ) = @_; 65 my $parent; 66 if ( 67 $parent = $self->parent() 68 and $parent->isa( 'PPIx::Regexp' ) 69 ) { 70 return $self->SUPER::explain(); 71 } elsif ( $self->in_regex_set() ) { 72 return q<Not significant in extended character class>; 73 } elsif ( my $count = $self->modifier_asserted( 'x*' ) ) { 74 return q<Not significant under /> . ( 'x' x $count ); 75 } else { 76 return $self->SUPER::explain(); 77 } 78} 79 80sub whitespace { 81 return 1; 82} 83 84# Objects of this class are generated either by the tokenizer itself 85# (when scanning for delimiters) or by PPIx::Regexp::Token::Literal (if 86# it hits a match for \s and finds the regular expression has the /x 87# modifier asserted. 88# 89# sub __PPIX_TOKENIZER__regexp { 90# my ( $class, $tokenizer, $character ) = @_; 91# 92# return scalar $tokenizer->find_regexp( qr{ \A \s+ }smx ); 93# 94# } 95 961; 97 98__END__ 99 100=head1 SUPPORT 101 102Support is by the author. Please file bug reports at 103L<https://rt.cpan.org/Public/Dist/Display.html?Name=PPIx-Regexp>, 104L<https://github.com/trwyant/perl-PPIx-Regexp/issues>, or in 105electronic mail to the author. 106 107=head1 AUTHOR 108 109Thomas R. Wyant, III F<wyant at cpan dot org> 110 111=head1 COPYRIGHT AND LICENSE 112 113Copyright (C) 2009-2021 by Thomas R. Wyant, III 114 115This program is free software; you can redistribute it and/or modify it 116under the same terms as Perl 5.10.0. For more details, see the full text 117of the licenses in the directory LICENSES. 118 119This program is distributed in the hope that it will be useful, but 120without any warranty; without even the implied warranty of 121merchantability or fitness for a particular purpose. 122 123=cut 124 125# ex: set textwidth=72 : 126