regex_sets.t revision 1.1 
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
8use strict;
9use warnings;
10
11$| = 1;
12
13BEGIN {
14    chdir 't' if -d 't';
15    @INC = ('../lib','.');
16    require './test.pl';
17}
18
19use utf8;
20no warnings 'experimental::regex_sets';
21
22like("a", qr/(?[ [a]      # This is a comment
23                    ])/, 'Can ignore a comment');
24like("a", qr/(?[ [a]      # [[:notaclass:]]
25                    ])/, 'A comment isn\'t parsed');
26unlike("\x85", qr/(?[ \t�� ])/, 'NEL is white space');
27unlike("\x85", qr/(?[ [\t��] ])/, '... including within nested []');
28like("\x85", qr/(?[ \t + \�� ])/, 'can escape NEL to match');
29like("\x85", qr/(?[ [\��] ])/, '... including within nested []');
30like("\t", qr/(?[ \t + \�� ])/, 'can do basic union');
31like("\cK", qr/(?[ \s ])/, '\s matches \cK');
32unlike("\cK", qr/(?[ \s - \cK ])/, 'can do basic subtraction');
33like(" ", qr/(?[ \s - \cK ])/, 'can do basic subtraction');
34like(":", qr/(?[ [:] ])/, '[:] is not a posix class');
35unlike("\t", qr/(?[ ! \t ])/, 'can do basic complement');
36like("\t", qr/(?[ ! [ ^ \t ] ])/, 'can do basic complement');
37unlike("\r", qr/(?[ \t ])/, '\r doesn\'t match \t ');
38like("\r", qr/(?[ ! \t ])/, 'can do basic complement');
39like("0", qr/(?[ [:word:] & [:digit:] ])/, 'can do basic intersection');
40unlike("A", qr/(?[ [:word:] & [:digit:] ])/, 'can do basic intersection');
41like("0", qr/(?[[:word:]&[:digit:]])/, 'spaces around internal [] aren\'t required');
42
43like("a", qr/(?[ [a] | [b] ])/, '| means union');
44like("b", qr/(?[ [a] | [b] ])/, '| means union');
45unlike("c", qr/(?[ [a] | [b] ])/, '| means union');
46
47like("a", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
48unlike("b", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
49like("c", qr/(?[ [ab] ^ [bc] ])/, 'basic symmetric difference works');
50
51like("2", qr/(?[ ( ( \pN & ( [a] + [2] ) ) ) ])/, 'Nesting parens and grouping');
52unlike("a", qr/(?[ ( ( \pN & ( [a] + [2] ) ) ) ])/, 'Nesting parens and grouping');
53
54unlike("\x{17f}", qr/(?[ [k] + \p{Blk=ASCII} ])/i, '/i doesn\'t affect \p{}');
55like("\N{KELVIN SIGN}", qr/(?[ [k] + \p{Blk=ASCII} ])/i, '/i does affect literals');
56
57my $thai_or_lao = qr/(?[ \p{Thai} + \p{Lao} ])/;
58my $thai_or_lao_digit = qr/(?[ \p{Digit} & $thai_or_lao ])/;
59like("\N{THAI DIGIT ZERO}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
60unlike(chr(ord("\N{THAI DIGIT ZERO}") - 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
61like("\N{THAI DIGIT NINE}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
62unlike(chr(ord("\N{THAI DIGIT NINE}") + 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
63like("\N{LAO DIGIT ZERO}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
64unlike(chr(ord("\N{LAO DIGIT ZERO}") - 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
65like("\N{LAO DIGIT NINE}", $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
66unlike(chr(ord("\N{LAO DIGIT NINE}") + 1), $thai_or_lao_digit, 'embedded qr/(?[ ])/ works');
67
68my $ascii_word = qr/(?[ \w ])/a;
69my $ascii_digits_plus_all_of_arabic = qr/(?[ \p{Digit} & $ascii_word + \p{Arabic} ])/;
70like("9", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for ASCII in the set");
71unlike("A", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for ASCII not in the set");
72unlike("\N{BENGALI DIGIT ZERO}", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for non-ASCII not in either set");
73unlike("\N{BENGALI LETTER A}", $ascii_digits_plus_all_of_arabic, "/a, then interpolating and intersection works for non-ASCII in one set");
74like("\N{ARABIC LETTER HAMZA}", $ascii_digits_plus_all_of_arabic, "interpolation and intersection is left-associative");
75like("\N{EXTENDED ARABIC-INDIC DIGIT ZERO}", $ascii_digits_plus_all_of_arabic, "interpolation and intersection is left-associative");
76
77my $kelvin = qr/(?[ \N{KELVIN SIGN} ])/;
78my $fold = qr/(?[ $kelvin ])/i;
79like("\N{KELVIN SIGN}", $kelvin, '"\N{KELVIN SIGN}" matches compiled qr/(?[ \N{KELVIN SIGN} ])/');
80unlike("K", $fold, "/i on outer (?[ ]) doesn't leak to interpolated one");
81unlike("k", $fold, "/i on outer (?[ ]) doesn't leak to interpolated one");
82
83my $kelvin_fold = qr/(?[ \N{KELVIN SIGN} ])/i;
84my $still_fold = qr/(?[ $kelvin_fold ])/;
85like("K", $still_fold, "/i on interpolated (?[ ]) is retained in outer without /i");
86like("k", $still_fold, "/i on interpolated (?[ ]) is retained in outer without /i");
87
88done_testing();
89
901;
91