Results of test64:
OK - ab
OK - b
OK - bc*
OK - bc\{-}
OK - bc\{-}\(d\)
OK - bc*
OK - c*
OK - bc*
OK - c*
OK - bc\+
OK - bc\+
OK - a\|ab
OK - c\?
OK - bc\?
OK - bc\?
OK - \va{1}
OK - \va{2}
OK - \va{2}
OK - \va{2}
OK - \va{2}
OK - \va{2}
OK - \va{2}
OK - \vb{1}
OK - \vba{2}
OK - \vba{3}
OK - \v(ab){1}
OK - \v(ab){1}
OK - \v(ab){1}
OK - \v(ab){0,2}
OK - \v(ab){0,2}
OK - \v(ab){1,2}
OK - \v(ab){1,2}
OK - \v(ab){2,4}
OK - \v(ab){2,4}
OK - \v(ab){2}
OK - \v(ab){2}
OK - \v(ab){2}
OK - \v(ab){2}
OK - \v((ab){2}){2}
OK - \v((ab){2}){2}
OK - \v(a{1}){1}
OK - \v(a{2}){1}
OK - \v(a{2}){1}
OK - \v(a{2}){1}
OK - \v(a{1}){2}
OK - \v(a{1}){2}
OK - \v(a{2})+
OK - \v(a{2})+
OK - \v(a{2}){1}
OK - \v(a{1}){2}
OK - \v(a{1}){1}
OK - \v(a{2}){2}
OK - \v(a{2}){2}
OK - \v(a+){2}
OK - \v(a{3}){2}
OK - \v(a{1,2}){2}
OK - \v(a{1,3}){2}
OK - \v(a{1,3}){2}
OK - \v(a{1,3}){3}
OK - \v(a{1,2}){2}
OK - \v(a+)+
OK - \v(a+)+
OK - \v(a+){1,2}
OK - \v(a+)(a+)
OK - \v(a{3})+
OK - \v(a|b|c)+
OK - \v(a|b|c){2}
OK - \v(abc){2}
OK - \v(abc){2}
OK - a*
OK - \v(a*)+
OK - \v((ab)+)+
OK - \v(((ab)+)+)+
OK - \v(((ab)+)+)+
OK - \v(a{0,2})+
OK - \v(a*)+
OK - \v((a*)+)+
OK - \v((ab)*)+
OK - \va{1,3}
OK - \va{2,3}
OK - \v((ab)+|c*)+
OK - \v(a{2})|(b{3})
OK - \va{2}|b{2}
OK - \v(a)+|(c)+
OK - \vab{2,3}c
OK - \vab{2,3}c
OK - \vab{2,3}cd{2,3}e
OK - \va(bc){2}d
OK - \va*a{2}
OK - \va*a{2}
OK - \va*a{2}
OK - \va*a{2}
OK - \va*b*|a*c*
OK - \va{1}b{1}|a{1}b{1}
OK - \v(a)
OK - \v(a)(b)
OK - \v(ab)(b)(c)
OK - \v((a)(b))
OK - \v(a)|(b)
OK - \v(a*)+
OK - x
OK - ab
OK - ab
OK - ab
OK - x*
OK - x*
OK - x*
OK - x\+
OK - x\+
OK - x\+
OK - x\+
OK - x\=
OK - x\=
OK - x\=
OK - x\?
OK - x\?
OK - x\?
OK - a\{0,0}
OK - a\{0,1}
OK - a\{1,0}
OK - a\{3,6}
OK - a\{3,6}
OK - a\{3,6}
OK - a\{0}
OK - a\{2}
OK - a\{2}
OK - a\{2}
OK - a\{0,}
OK - a\{0,}
OK - a\{2,}
OK - a\{2,}
OK - a\{,0}
OK - a\{,5}
OK - a\{,5}
OK - a\{}
OK - a\{}
OK - a\{-0,0}
OK - a\{-0,1}
OK - a\{-3,6}
OK - a\{-3,6}
OK - a\{-3,6}
OK - a\{-0}
OK - a\{-2}
OK - a\{-2}
OK - a\{-0,}
OK - a\{-0,}
OK - a\{-2,}
OK - a\{-2,}
OK - a\{-,0}
OK - a\{-,5}
OK - a\{-,5}
OK - a\{-}
OK - a\{-}
OK - \(abc\)*
OK - \(ab\)\+
OK - \(abaaaaa\)*cd
OK - \(test1\)\? \(test2\)\?
OK - \(test1\)\= \(test2\) \(test4443\)\=
OK - \(\(sub1\) hello \(sub 2\)\)
OK - \(\(\(yyxxzz\)\)\)
OK - \v((ab)+|c+)+
OK - \v((ab)|c*)+
OK - \v(a(c*)+b)+
OK - \v(a|b*)+
OK - a\{-2,7}
OK - a\{2,7}
OK - \vx(.{-,8})yz(.*)
OK - \vx(.*)yz(.*)
OK - \v(a{1,2}){-2,3}
OK - \v(a{-1,3})+
OK - \d\+e\d\d
OK - \v[a]
OK - a[bcd]
OK - a[b-d]
OK - [a-d][e-f][x-x]d
OK - \v[[:alpha:]]+
OK - [[:alpha:]\+]
OK - [^abc]\+
OK - [^abc]
OK - [^abc]\+
OK - [^a-d]\+
OK - [a-f]*
OK - [a-f]*
OK - [^a-f]\+
OK - [a-c]\{-3,6}
OK - [^[:alpha:]]\+
OK - [-a]
OK - [a-]
OK - [-./[:alnum:]_~]\+
OK - [\]\^\-\\]\+
OK - [[.a.]]\+
OK - abc[0-9]*ddd
OK - abc[0-9]*ddd
OK - \_[0-9]\+
OK - [0-9\n]\+
OK - [0-9]
OK - [^0-9]
OK - [0-9a-fA-F]*
OK - [^0-9A-Fa-f]\+
OK - [a-z_A-Z0-9]\+
OK - [a-z]
OK - [a-zA-Z]
OK - [A-Z]
OK - \C[^A-Z]\+
OK - xx \ze test
OK - abc\zeend
OK - abc\zsdd
OK - aa \zsax
OK - abc \zsmatch\ze abc
OK - \v(a \zsif .*){2}
OK - \>\zs.
OK - abc\@=
OK - abc\@=cd
OK - abc\@=
OK - abcd\@=e
OK - abcd\@=e
OK - \v(abc)@=..
OK - \(.*John\)\@=.*Bob
OK - \(John.*\)\@=.*Bob
OK - .*John\&.*Bob
OK - .*John\&.*Bob
OK - \v(test1)@=.*yep
OK - [[:alpha:]]\{-2,6}
OK - 
OK - \v(())
OK - \v%(ab(xyz)c)
OK - \v(test|)empty
OK - \v(a|aa)(a|aa)
OK - \%d32
OK - \%o40
OK - \%x20
OK - \%u0020
OK - \%U00000020
OK - goo\|go
OK - \<goo\|\<go
OK - \<goo\|go
192.168.0.1