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t/re/regex_sets.t: Add some tests
[perl5.git] / t / re / regex_sets.t
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1#!./perl
2
3# This tests (?[...]). XXX These are just basic tests, as full ones would be
4# best done with an infrastructure change to allow getting out the inversion
5# list of the constructed set and then comparing it character by character
6# with the expected result.
7
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8BEGIN {
9 chdir 't' if -d 't';
cc7e6304 10 @INC = ('../lib','.','../ext/re');
9d1a5160 11 require './test.pl';
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12 require './charset_tools.pl';
13 require './loc_tools.pl';
2b08d1e2 14 skip_all_without_unicode_tables();
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15}
16
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17use strict;
18use warnings;
19
20$| = 1;
21
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22use utf8;
23no warnings 'experimental::regex_sets';
24
25like("a", qr/(?[ [a] # This is a comment
26 ])/, 'Can ignore a comment');
27like("a", qr/(?[ [a] # [[:notaclass:]]
28 ])/, 'A comment isn\'t parsed');
e9f74f49 29unlike(uni_to_native("\x85"), qr/(?[ \t\85 ])/, 'NEL is white space');
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30like(uni_to_native("\x85"), qr/(?[ \t + \\85 ])/, 'can escape NEL to match');
31like(uni_to_native("\x85"), qr/(?[ [\\85] ])/, '... including within nested []');
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32like("\t", qr/(?[ \t + \\85 ])/, 'can do basic union');
33like("\cK", qr/(?[ \s ])/, '\s matches \cK');
34unlike("\cK", qr/(?[ \s - \cK ])/, 'can do basic subtraction');
35like(" ", qr/(?[ \s - \cK ])/, 'can do basic subtraction');
36like(":", qr/(?[ [:] ])/, '[:] is not a posix class');
37unlike("\t", qr/(?[ ! \t ])/, 'can do basic complement');
38like("\t", qr/(?[ ! [ ^ \t ] ])/, 'can do basic complement');
39unlike("\r", qr/(?[ \t ])/, '\r doesn\'t match \t ');
40like("\r", qr/(?[ ! \t ])/, 'can do basic complement');
41like("0", qr/(?[ [:word:] & [:digit:] ])/, 'can do basic intersection');
42unlike("A", qr/(?[ [:word:] & [:digit:] ])/, 'can do basic intersection');
43like("0", qr/(?[[:word:]&[:digit:]])/, 'spaces around internal [] aren\'t required');
44
45like("a", qr/(?[ [a] | [b] ])/, '| means union');
46like("b", qr/(?[ [a] | [b] ])/, '| means union');
47unlike("c", qr/(?[ [a] | [b] ])/, '| means union');
48
49like("a", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
50unlike("b", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
51like("c", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
52
53like("2", qr/(?[ ( ( \pN & ( [a] + [2] ) ) ) ])/, 'Nesting parens and grouping');
54unlike("a", qr/(?[ ( ( \pN & ( [a] + [2] ) ) ) ])/, 'Nesting parens and grouping');
55
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56unlike("\x{17f}", qr/(?[ [k] + \p{Blk=ASCII} ])/i, '/i doesn\'t affect \p{}');
57like("\N{KELVIN SIGN}", qr/(?[ [k] + \p{Blk=ASCII} ])/i, '/i does affect literals');
58
59my $thai_or_lao = qr/(?[ \p{Thai} + \p{Lao} ])/;
60my $thai_or_lao_digit = qr/(?[ \p{Digit} & $thai_or_lao ])/;
61like("\N{THAI DIGIT ZERO}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
62unlike(chr(ord("\N{THAI DIGIT ZERO}") - 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
63like("\N{THAI DIGIT NINE}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
64unlike(chr(ord("\N{THAI DIGIT NINE}") + 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
65like("\N{LAO DIGIT ZERO}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
66unlike(chr(ord("\N{LAO DIGIT ZERO}") - 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
67like("\N{LAO DIGIT NINE}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
68unlike(chr(ord("\N{LAO DIGIT NINE}") + 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
9d1a5160 69
589b831d 70my $ascii_word = qr/(?[ \w ])/a;
6798c95d 71my $ascii_digits_plus_all_of_arabic = qr/(?[ \p{Arabic} + \p{Digit} & $ascii_word ])/;
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72like("9", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for ASCII in the set");
73unlike("A", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for ASCII not in the set");
74unlike("\N{BENGALI DIGIT ZERO}", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for non-ASCII not in either set");
75unlike("\N{BENGALI LETTER A}", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for non-ASCII in one set");
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76like("\N{ARABIC LETTER HAMZA}", $ascii_digits_plus_all_of_arabic, "intersection has higher precedence than union");
77like("\N{EXTENDED ARABIC-INDIC DIGIT ZERO}", $ascii_digits_plus_all_of_arabic, "intersection has higher precedence than union");
78
79like("\r", qr/(?[ \p{lb=cr} ])/, '\r matches \p{lb=cr}');
80unlike("\r", qr/(?[ ! \p{lb=cr} ])/, '\r doesnt match ! \p{lb=cr}');
81like("\r", qr/(?[ ! ! \p{lb=cr} ])/, 'Two ! ! are the original');
82unlike("\r", qr/(?[ ! ! ! \p{lb=cr} ])/, 'Three ! ! ! are the complement');
83# left associatve
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84
85my $kelvin = qr/(?[ \N{KELVIN SIGN} ])/;
86my $fold = qr/(?[ $kelvin ])/i;
87like("\N{KELVIN SIGN}", $kelvin, '"\N{KELVIN SIGN}" matches compiled qr/(?[ \N{KELVIN SIGN} ])/');
88unlike("K", $fold, "/i on outer (?[ ]) doesn't leak to interpolated one");
89unlike("k", $fold, "/i on outer (?[ ]) doesn't leak to interpolated one");
90
91my $kelvin_fold = qr/(?[ \N{KELVIN SIGN} ])/i;
92my $still_fold = qr/(?[ $kelvin_fold ])/;
93like("K", $still_fold, "/i on interpolated (?[ ]) is retained in outer without /i");
94like("k", $still_fold, "/i on interpolated (?[ ]) is retained in outer without /i");
9d1a5160 95
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96eval 'my $x = qr/(?[ [a] ])/; qr/(?[ $x ])/';
97is($@, "", 'qr/(?[ [a] ])/ can be interpolated');
98
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99like("B", qr/(?[ [B] | ! ( [^B] ) ])/, "[perl #125892]");
100
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101like("a", qr/(?[ (?#comment) [a]])/, "Can have (?#comments)");
102
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103if (! is_miniperl() && locales_enabled('LC_CTYPE')) {
104 my $utf8_locale = find_utf8_ctype_locale;
105 SKIP: {
106 skip("No utf8 locale available on this platform", 8) unless $utf8_locale;
107
108 setlocale(&POSIX::LC_ALL, "C");
109 use locale;
110
111 $kelvin_fold = qr/(?[ \N{KELVIN SIGN} ])/i;
112 my $single_char_class = qr/(?[ \: ])/;
113
114 setlocale(&POSIX::LC_ALL, $utf8_locale);
115
116 like("\N{KELVIN SIGN}", $kelvin_fold,
117 '(?[ \N{KELVIN SIGN} ]) matches itself under /i in UTF8-locale');
118 like("K", $kelvin_fold,
119 '(?[ \N{KELVIN SIGN} ]) matches "K" under /i in UTF8-locale');
120 like("k", $kelvin_fold,
121 '(?[ \N{KELVIN SIGN} ]) matches "k" under /i in UTF8-locale');
122 like(":", $single_char_class,
123 '(?[ : ]) matches itself in UTF8-locale (a single character class)');
124
125 setlocale(&POSIX::LC_ALL, "C");
126
127 # These should generate warnings (the above 4 shouldn't), but like()
128 # suppresses them, so the warnings tests are in t/lib/warnings/regexec
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129 $^W = 0; # Suppress the warnings that occur when run by hand with
130 # the -w option
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131 like("\N{KELVIN SIGN}", $kelvin_fold,
132 '(?[ \N{KELVIN SIGN} ]) matches itself under /i in C locale');
133 like("K", $kelvin_fold,
134 '(?[ \N{KELVIN SIGN} ]) matches "K" under /i in C locale');
135 like("k", $kelvin_fold,
136 '(?[ \N{KELVIN SIGN} ]) matches "k" under /i in C locale');
137 like(":", $single_char_class,
138 '(?[ : ]) matches itself in C locale (a single character class)');
139 }
140}
141
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142# Tests that no warnings given for valid Unicode digit range.
143my $arabic_digits = qr/(?[ [ ٠ - ٩ ] ])/;
144for my $char ("٠", "٥", "٩") {
145 use charnames ();
146 my @got = capture_warnings(sub {
147 like("٠", $arabic_digits, "Matches "
148 . charnames::viacode(ord $char));
149 });
150 is (@got, 0, "... without warnings");
151}
152
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153# RT #126181: \cX behaves strangely inside (?[])
154{
155 no warnings qw(syntax regexp);
156
157 eval { $_ = '/(?[(\c]) /'; qr/$_/ };
158 like($@, qr/^Syntax error/, '/(?[(\c]) / should not panic');
159 eval { $_ = '(?[\c#]' . "\n])"; qr/$_/ };
160 like($@, qr/^Syntax error/, '/(?[(\c]) / should not panic');
161 eval { $_ = '(?[(\c])'; qr/$_/ };
162 like($@, qr/^Syntax error/, '/(?[(\c])/ should be a syntax error');
163 eval { $_ = '(?[(\c]) ]\b'; qr/$_/ };
164 like($@, qr/^Syntax error/, '/(?[(\c]) ]\b/ should be a syntax error');
165 eval { $_ = '(?[\c[]](])'; qr/$_/ };
166 like($@, qr/^Syntax error/, '/(?[\c[]](])/ should be a syntax error');
167 like("\c#", qr/(?[\c#])/, '\c# should match itself');
168 like("\c[", qr/(?[\c[])/, '\c[ should match itself');
169 like("\c\ ", qr/(?[\c\])/, '\c\ should match itself');
170 like("\c]", qr/(?[\c]])/, '\c] should match itself');
171}
a0bd1a30 172
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173# RT #126481 !! with syntax error panics
174{
175 fresh_perl_like('no warnings "experimental::regex_sets"; qr/(?[ ! ! (\w])/',
176 qr/^Unmatched \(/, {},
177 'qr/(?[ ! ! (\w])/ doesnt panic');
178 # The following didn't panic before, but easy to add this here with a
179 # paren between the !!
180 fresh_perl_like('no warnings "experimental::regex_sets";qr/(?[ ! ( ! (\w)])/',
181 qr/^Unmatched \(/, {},
182 'qr/qr/(?[ ! ( ! (\w)])/');
183}
184
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185done_testing();
186
1871;