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=head1 NAME |
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PPIx::Regexp::Token::CharClass::Simple - This class represents a simple character class |
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=head1 SYNOPSIS |
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use PPIx::Regexp::Dumper; |
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PPIx::Regexp::Dumper->new( 'qr{\w}smx' ) |
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->print(); |
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=head1 INHERITANCE |
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C is a |
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L. |
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C has no descendants. |
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=head1 DESCRIPTION |
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This class represents one of the simple character classes that can occur |
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anywhere in a regular expression. This includes not only the truly |
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simple things like \w, but also Unicode properties, including properties |
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with wildcard values. |
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=head1 METHODS |
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This class provides no public methods beyond those provided by its |
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superclass. |
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=cut |
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package PPIx::Regexp::Token::CharClass::Simple; |
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use strict; |
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use warnings; |
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use base qw{ PPIx::Regexp::Token::CharClass }; |
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use PPIx::Regexp::Constant qw{ |
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COOKIE_CLASS |
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LITERAL_LEFT_CURLY_REMOVED_PHASE_1 |
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LITERAL_LEFT_CURLY_REMOVED_PHASE_2 |
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MINIMUM_PERL |
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TOKEN_LITERAL |
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TOKEN_UNKNOWN |
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@CARP_NOT |
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}; |
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our $VERSION = '0.087_01'; |
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use constant UNICODE_PROPERTY_LITERAL_VALUE => qr/ |
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\{ \s* \^? \w [\w:=\s-]* \} | |
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[CLMNPSZ] # perluniprops for 5.26.1 |
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/smx; |
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use constant UNICODE_PROPERTY_LITERAL => |
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qr/ \A \\ [Pp] (?: |
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@{[ UNICODE_PROPERTY_LITERAL_VALUE ]} |
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) /smx; |
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# CAVEAT: The following regular expression, despite its name, matches |
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# ALL unicode property values. To actually match a wildcard property you |
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# must first eliminate anything that matches UNICODE_PROPERTY_LITERAL or |
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# UNICODE_PROPERTY_NAME_MATCH |
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use constant UNICODE_PROPERTY_WILDCARD => |
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qr/ \A \\ [Pp] \{ \s* [\w\s-]+ [:=] [^}]+ \} /smx; |
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use constant UNICODE_PROPERTY_NAME_MATCH => |
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qr< \A \\ [Pp] \{ \s* na (?: me? )? [:=] / [^/]+ / \} >smx; |
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use constant UNICODE_PROPERTY => |
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qr/ @{[ UNICODE_PROPERTY_LITERAL ]} | |
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@{[ UNICODE_PROPERTY_NAME_MATCH ]} | |
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@{[ UNICODE_PROPERTY_WILDCARD ]} /smx; |
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{ |
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my %kind_of_match = ( |
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p => 'with', |
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P => 'without', |
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); |
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my %explanation = ( |
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'.' => 'Match any character', |
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'\\C' => 'Match a single octet (removed in 5.23.0)', |
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'\\D' => 'Match any character but a decimal digit', |
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'\\H' => 'Match a non-horizontal-white-space character', |
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'\\N' => 'Match any character but a new-line character', |
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'\\R' => 'Match a generic new-line character', |
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'\\S' => 'Match non-white-space character', |
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'\\V' => 'Match a non-vertical-white-space character', |
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'\\W' => 'Match non-word character', |
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'\\X' => 'Match a Unicode extended grapheme cluster', |
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'\\d' => 'Match decimal digit', |
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'\\h' => 'Match a horizontal-white-space character', |
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'\\s' => 'Match white-space character', |
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'\\v' => 'Match a vertical-white-space character', |
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'\\w' => 'Match word character', |
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); |
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sub __explanation { |
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return \%explanation; |
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} |
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sub explain { |
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my ( $self ) = @_; |
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if ( $self->content() =~ m/ \A \\ ( [Pp] ) ( [{] .* [}] | . ) \z /smx ) { |
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my ( $kind, $prop ) = ( $1, $2 ); |
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my $literal = ( $prop =~ |
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m/ \A @{[ UNICODE_PROPERTY_LITERAL_VALUE ]} \z /smx ); |
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if ( 1 < length $prop ) { |
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$prop =~ s/ \A [{] //smx; |
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$prop =~ s/ [}] \z //smx; |
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} |
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$literal |
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and return sprintf |
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q, |
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$kind_of_match{$kind}, $prop; |
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return sprintf |
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q, |
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$kind_of_match{$kind}, $prop; |
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} |
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return $self->SUPER::explain(); |
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} |
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} |
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##=head2 is_case_sensitive |
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## |
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##This override of the superclass method returns true for Unicode |
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##properties that specify case, and false (but defined) for all |
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##other character classes. |
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## |
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##The classes that specify case are documented in |
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##L. |
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## |
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##B This method returns false (but defined) for user-defined |
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##Unicode properties. It should return C. This bug B be fixed |
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##if I find a way to identify all system-defined Unicode properties. |
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## |
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##=cut |
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## |
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##sub is_case_sensitive { |
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## my ( $self ) = @_; |
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## exists $self->{is_case_sensitive} |
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## and return $self->{is_case_sensitive}; |
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## return ( $self->{is_case_sensitive} = $self->_is_case_sensitive() ); |
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##} |
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##{ |
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## my %case_sensitive = map { $_ => 1 } qw{ |
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## generalcategory=lowercaseletter generalcategory=ll |
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## gc=lowercaseletter gc=ll |
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## generalcategory=titlecaseletter generalcategory=lt |
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## gc=titlecaseletter gc=lt |
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## generalcategory=uppercaseletter generalcategory=lu |
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## gc=uppercaseletter gc=lu |
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## lowercaseletter lowercase lower ll |
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## titlecaseletter titlecase title lt |
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## uppercaseletter uppercase upper lu |
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## lowercase=y lower=y lowercase=n lower=n |
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## titlecase=y title=y titlecase=n title=n |
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## uppercase=y upper=y uppercase=n upper=n |
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## }; |
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## |
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## sub _is_case_sensitive { |
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## my ( $self ) = @_; |
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## my $content = $self->content(); |
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## $content =~ m/ \A \\ p [{] ( .* ) [}] /smxi |
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## or return 0; |
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## $content = lc $1; |
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## $content =~ s/ \A ^ //smx; |
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## $content =~ s/ [\s_-] //smxg; |
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## $content =~ s/ \A is //smx; |
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## $content =~ s/ : /=/smxg; |
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## $content =~ s/ = (?: yes | t | true ) \b /=y/smxg; |
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## $content =~ s/ = (?: no | f | false ) \b /=n/smxg; |
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## return $case_sensitive{$content} || 0; |
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## } |
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## |
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##} |
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186
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{ |
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188
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my %introduced = ( |
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'\\h' => '5.009005', # Before this, parsed as 'h' |
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'\\v' => '5.009005', # Before this, parsed as 'v' |
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'\\H' => '5.009005', # Before this, parsed as 'H' |
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'\\N' => '5.011', # Before this, an error. |
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'\\V' => '5.009005', # Before this, parsed as 'V' |
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'\\R' => '5.009005', |
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'\\C' => '5.006', |
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'\\X' => '5.006', |
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); |
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199
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sub perl_version_introduced { |
200
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31
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1
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5549
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my ( $self ) = @_; |
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my $content = $self->content(); |
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100
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135
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if ( defined( my $minver = $introduced{$content} ) ) { |
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return $minver; |
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} |
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# I must have read perl5113delta and thought this |
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# represented the change they were talking about, but I sure |
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# don't see it now. So, until things become clearer ... |
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# $content =~ m/ \G .*? [\s=-] /smxgc |
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# and return '5.011003'; |
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$content =~ UNICODE_PROPERTY_LITERAL |
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|
|
and return '5.006001'; |
212
|
19
|
50
|
|
|
|
62
|
$content =~ UNICODE_PROPERTY_NAME_MATCH |
213
|
|
|
|
|
|
|
and return '5.031010'; |
214
|
19
|
100
|
|
|
|
58
|
$content =~ UNICODE_PROPERTY_WILDCARD |
215
|
|
|
|
|
|
|
and return '5.029009'; |
216
|
18
|
|
|
|
|
50
|
return MINIMUM_PERL; |
217
|
|
|
|
|
|
|
} |
218
|
|
|
|
|
|
|
|
219
|
|
|
|
|
|
|
} |
220
|
|
|
|
|
|
|
|
221
|
|
|
|
|
|
|
{ |
222
|
|
|
|
|
|
|
my %removed = ( |
223
|
|
|
|
|
|
|
'\\C' => '5.023', # Before this, matched an octet |
224
|
|
|
|
|
|
|
); |
225
|
|
|
|
|
|
|
|
226
|
|
|
|
|
|
|
sub perl_version_removed { |
227
|
31
|
|
|
31
|
1
|
11686
|
my ( $self ) = @_; |
228
|
31
|
|
|
|
|
100
|
return $removed{ $self->content() }; |
229
|
|
|
|
|
|
|
} |
230
|
|
|
|
|
|
|
} |
231
|
|
|
|
|
|
|
|
232
|
|
|
|
|
|
|
# This is one of the larger complications of |
233
|
|
|
|
|
|
|
# https://rt.perl.org/Public/Bug/Display.html?id=128213 |
234
|
|
|
|
|
|
|
# where it transpired that un-escaped literal left curlies were not |
235
|
|
|
|
|
|
|
# giving warnings/errors in /.{/, /\p{...}{/, and /\P{...}{/, but were |
236
|
|
|
|
|
|
|
# for all the others that bin into this class (e.g. /\s{/). |
237
|
|
|
|
|
|
|
# Note that the perldelta for 5.25.1 and 5.26.0 do not acknowledge tha |
238
|
|
|
|
|
|
|
# phased deprecation, and pretend that everything was done on the phase |
239
|
|
|
|
|
|
|
# 1 schedule. This appears to be deliberate per |
240
|
|
|
|
|
|
|
# https://rt.perl.org/Ticket/Display.html?id=131352 |
241
|
|
|
|
|
|
|
sub __following_literal_left_curly_disallowed_in { |
242
|
4
|
|
|
4
|
|
10
|
my ( $self ) = @_; |
243
|
4
|
100
|
|
|
|
11
|
q<.> eq ( my $content = $self->content() ) |
244
|
|
|
|
|
|
|
and return LITERAL_LEFT_CURLY_REMOVED_PHASE_2; |
245
|
3
|
100
|
|
|
|
20
|
$content =~ m/ \A \\ p \{ /smxi |
246
|
|
|
|
|
|
|
and return LITERAL_LEFT_CURLY_REMOVED_PHASE_2; |
247
|
1
|
|
|
|
|
9
|
return LITERAL_LEFT_CURLY_REMOVED_PHASE_1; |
248
|
|
|
|
|
|
|
} |
249
|
|
|
|
|
|
|
|
250
|
|
|
|
|
|
|
sub __PPIX_TOKENIZER__regexp { |
251
|
1286
|
|
|
1286
|
|
2803
|
my ( undef, $tokenizer, $character ) = @_; |
252
|
|
|
|
|
|
|
|
253
|
1286
|
|
|
|
|
3302
|
my $in_class = $tokenizer->cookie( COOKIE_CLASS ); |
254
|
|
|
|
|
|
|
|
255
|
1286
|
100
|
|
|
|
3196
|
if ( $character eq '.' ) { |
256
|
18
|
50
|
|
|
|
70
|
$in_class |
257
|
|
|
|
|
|
|
and return $tokenizer->make_token( 1, TOKEN_LITERAL ); |
258
|
18
|
|
|
|
|
46
|
return 1; |
259
|
|
|
|
|
|
|
} |
260
|
|
|
|
|
|
|
|
261
|
1268
|
100
|
|
|
|
6114
|
if ( my $accept = $tokenizer->find_regexp( |
262
|
|
|
|
|
|
|
qr{ \A \\ [wWsSdDvVhHXRNC] }smx |
263
|
|
|
|
|
|
|
) ) { |
264
|
83
|
100
|
|
|
|
334
|
if ( $in_class ) { |
265
|
9
|
|
|
|
|
48
|
my $match = $tokenizer->match(); |
266
|
|
|
|
|
|
|
# As of Perl 5.11.5, [\N] is a fatal error. |
267
|
9
|
50
|
|
|
|
39
|
'\\N' eq $match |
268
|
|
|
|
|
|
|
and return $tokenizer->make_token( |
269
|
|
|
|
|
|
|
$accept, TOKEN_UNKNOWN, { |
270
|
|
|
|
|
|
|
error => '\\N invalid inside character class', |
271
|
|
|
|
|
|
|
}, |
272
|
|
|
|
|
|
|
); |
273
|
|
|
|
|
|
|
# \R is not recognized inside a character class. It |
274
|
|
|
|
|
|
|
# eventually ends up as a literal. |
275
|
9
|
50
|
|
|
|
46
|
'\\R' eq $match and return; |
276
|
|
|
|
|
|
|
} |
277
|
83
|
|
|
|
|
279
|
return $accept; |
278
|
|
|
|
|
|
|
} |
279
|
|
|
|
|
|
|
|
280
|
1185
|
100
|
|
|
|
3988
|
if ( my $accept = $tokenizer->find_regexp( UNICODE_PROPERTY ) ) { |
281
|
13
|
|
|
|
|
65
|
return $accept; |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
|
284
|
1172
|
100
|
|
|
|
4598
|
if ( my $accept = $tokenizer->find_regexp( qr< \A \\ p [{] \s* [}] >smx ) |
285
|
|
|
|
|
|
|
) { |
286
|
1
|
|
|
|
|
7
|
return $tokenizer->make_token( $accept, TOKEN_UNKNOWN, { |
287
|
|
|
|
|
|
|
error => 'Empty \\p{} is an error', |
288
|
|
|
|
|
|
|
}, |
289
|
|
|
|
|
|
|
); |
290
|
|
|
|
|
|
|
} |
291
|
|
|
|
|
|
|
|
292
|
1171
|
|
|
|
|
3521
|
return; |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
1; |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
__END__ |