<?php
// single character
test('/[abc]/',
R::expression()->inChars(R::chars('abc'))
);
// some quantifier: optional
test('/[abc]?/',
R::expression()->inChars(R::chars('abc')->optional())
);
// negation
test('/[^abc]/',
R::expression()->notInChars(R::chars('abc'))
);
// dot
test('/./',
R::expression()->char(R::anyChar())
);
// dot with modifier
test('/.+/',
R::expression()->char(R::anyChar()->oneOrMore())
);
// specific characters
test('/[a]/',
R::expression()->inChars(R::chars()->char('a'))
);
// whitespace
test('/[\s]/',
R::expression()->inChars(R::chars()->whitespace())
);
// anythingButWhitespace
test('/[\S]/',
R::expression()->inChars(R::chars()->anythingButWhitespace())
);
// letter
test('/[A-Za-z]/',
R::expression()->inChars(R::chars()->letter())
);
// digit
test('/[\d]/',
R::expression()->inChars(R::chars()->digit())
);
// anything but digit
test('/[\D]/',
R::expression()->inChars(R::chars()->anythingButDigit())
);
// wordCharacter
test('/[\w]/',
R::expression()->inChars(R::chars()->wordCharacter())
);
// anythingButWordCharacter
test('/[\W]/',
R::expression()->inChars(R::chars()->anythingButWordCharacter())
);
// characters that should be escaped
test('/[\]\\\\]/',
R::expression()->inChars(R::chars(']\\'))
);
// \b should not be escaped
test('/[a\]\\bc]/',
R::expression()->inChars(R::chars('a]\\bc'))
);
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