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## lookarounds
<before .d> a. abacad /mob: <ad @ 4>/ lookahead <before>
<before c> .... abacad n lookahead <before>
<before> . abcd n null <before>
<!before ..b> aa aabaaa /mob: <aa @ 3>/ negated lookahead
# todo :any<after>
<after a>b ab y lookbehind <after>
# todo :any<after>
<after a>b cb n lookbehind <after>
# todo :any<after>
<after a>b b n lookbehind <after>
# todo :any<after>
<!after c>b ab y lookbehind <!after>
# todo :any<after>
<!after c>b cb n lookbehind <!after>
# todo :any<after>
<!after c>b b y lookbehind <!after>
# todo :any<after>
<!after <[cd]>>b dbcb n lookbehind <!after>
# todo :any<after>
<!after <[cd]>><[ab]> dbaacb y lookbehind <!after>
# todo :any<after>
<!after c|d>b dbcb n lookbehind <!after>
# todo :any<after>
<!after c|d><[ab]> dbaacb y lookbehind <!after>
# todo :any<after>
<!after cd><[ab]> cbaccb y lookbehind <!after>
# todo :any<after>
$ <after ^a> a y lookbehind <after>
# todo :any<after>
<after x+>y axxbxxyc y lookbehind <after>
<[a..z]>+ az y metasyntax with leading + (<+...>)
<+[a..z]>+ az y metasyntax with leading + (<+...>)
<+alpha>+ az y metasyntax with leading + (<+...>)
<?> '' y null pattern (<?>)
^ <?> \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij y null pattern (<?>)
<?> $ \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij y null pattern (<?>)
abc <?> def \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij y null pattern (<?>)
x | y | <?> \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij y null pattern (<?>)
x | y | <?> \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij y null pattern (<?>)
abc <!> def \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij n fail pattern <!>
# todo :any<parsing>
a[b} \t\n\r !"#$%&'()*+,-./:;<=>?@[\]^`_{|}0123456789ABCDEFGHIJabcdefghij /error/ mismatched close
c <before .d> abacad /mob: <c @ 3>/ one character and lookahead <before>
.* <before .d> abacad /mob: <abac @ 0>/ multiple characters and lookahead <before>
.* <before .\<> abaca<d /mob: <abac @ 0>/ multiple characters and lookahead <before> with a '<'
.* <before \<> aba<ca<d /mob: <aba<ca @ 0>/ greedy any character and lookahead <before> with a '<'
.*? <before \<> aba<ca<d /mob: <aba @ 0>/ non-greedy any character and lookahead <before> with a '<'
## vim: noexpandtab tabstop=4 shiftwidth=4
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