Test for regexp patterns without multi-byte support.
See test95 for multi-byte tests.

A pattern that gives the expected result produces OK, so that we know it was
actually tried.

STARTTEST
:so small.vim
:" tl is a List of Lists with:
:"    regexp pattern
:"    text to test the pattern on
:"    expected match (optional)
:"    expected submatch 1 (optional)
:"    expected submatch 2 (optional)
:"    etc.
:"  When there is no match use only the first two items.
:let tl = []
:"
:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
:"""" Previously written tests """"""""""""""""""""""""""""""""
:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
:"
:call add(tl, [2, 'ab', 'aab', 'ab'])
:call add(tl, [2, 'b', 'abcdef', 'b'])
:call add(tl, [2, 'bc*', 'abccccdef', 'bcccc'])
:call add(tl, [2, 'bc\{-}', 'abccccdef', 'b'])
:call add(tl, [2, 'bc\{-}\(d\)', 'abccccdef', 'bccccd', 'd'])
:call add(tl, [2, 'bc*', 'abbdef', 'b'])
:call add(tl, [2, 'c*', 'ccc', 'ccc'])
:call add(tl, [2, 'bc*', 'abdef', 'b'])
:call add(tl, [2, 'c*', 'abdef', ''])
:call add(tl, [2, 'bc\+', 'abccccdef', 'bcccc'])
:call add(tl, [2, 'bc\+', 'abdef']) "no match
:"
:"operator \|
:call add(tl, [2, 'a\|ab', 'cabd', 'a']) "alternation is ordered
:"
:call add(tl, [2, 'c\?', 'ccb', 'c'])
:call add(tl, [2, 'bc\?', 'abd', 'b'])
:call add(tl, [2, 'bc\?', 'abccd', 'bc'])
:"
:call add(tl, [2, '\va{1}', 'ab', 'a'])
:"
:call add(tl, [2, '\va{2}', 'aa', 'aa'])
:call add(tl, [2, '\va{2}', 'caad', 'aa'])
:call add(tl, [2, '\va{2}', 'aba'])
:call add(tl, [2, '\va{2}', 'ab'])
:call add(tl, [2, '\va{2}', 'abaa', 'aa'])
:call add(tl, [2, '\va{2}', 'aaa', 'aa'])
:"
:call add(tl, [2, '\vb{1}', 'abca', 'b'])
:call add(tl, [2, '\vba{2}', 'abaa', 'baa'])
:call add(tl, [2, '\vba{3}', 'aabaac'])
:"
:call add(tl, [2, '\v(ab){1}', 'ab', 'ab', 'ab'])
:call add(tl, [2, '\v(ab){1}', 'dabc', 'ab', 'ab'])
:call add(tl, [2, '\v(ab){1}', 'acb'])
:"
:call add(tl, [2, '\v(ab){0,2}', 'acb', "", ""])
:call add(tl, [2, '\v(ab){0,2}', 'ab', 'ab', 'ab'])
:call add(tl, [2, '\v(ab){1,2}', 'ab', 'ab', 'ab'])
:call add(tl, [2, '\v(ab){1,2}', 'ababc', 'abab', 'ab'])
:call add(tl, [2, '\v(ab){2,4}', 'ababcab', 'abab', 'ab'])
:call add(tl, [2, '\v(ab){2,4}', 'abcababa', 'abab', 'ab'])
:"
:call add(tl, [2, '\v(ab){2}', 'abab', 'abab', 'ab'])
:call add(tl, [2, '\v(ab){2}', 'cdababe', 'abab', 'ab'])
:call add(tl, [2, '\v(ab){2}', 'abac'])
:call add(tl, [2, '\v(ab){2}', 'abacabab', 'abab', 'ab'])
:call add(tl, [2, '\v((ab){2}){2}', 'abababab', 'abababab', 'abab', 'ab'])
:call add(tl, [2, '\v((ab){2}){2}', 'abacabababab', 'abababab', 'abab', 'ab'])
:"
:call add(tl, [2, '\v(a{1}){1}', 'a', 'a', 'a'])
:call add(tl, [2, '\v(a{2}){1}', 'aa', 'aa', 'aa'])
:call add(tl, [2, '\v(a{2}){1}', 'aaac', 'aa', 'aa'])
:call add(tl, [2, '\v(a{2}){1}', 'daaac', 'aa', 'aa'])
:call add(tl, [2, '\v(a{1}){2}', 'daaac', 'aa', 'a'])
:call add(tl, [2, '\v(a{1}){2}', 'aaa', 'aa', 'a'])
:call add(tl, [2, '\v(a{2})+', 'adaac', 'aa', 'aa'])
:call add(tl, [2, '\v(a{2})+', 'aa', 'aa', 'aa'])
:call add(tl, [2, '\v(a{2}){1}', 'aa', 'aa', 'aa'])
:call add(tl, [2, '\v(a{1}){2}', 'aa', 'aa', 'a'])
:call add(tl, [2, '\v(a{1}){1}', 'a', 'a', 'a'])
:call add(tl, [2, '\v(a{2}){2}', 'aaaa', 'aaaa', 'aa'])
:call add(tl, [2, '\v(a{2}){2}', 'aaabaaaa', 'aaaa', 'aa'])
:"
:call add(tl, [2, '\v(a+){2}', 'dadaac', 'aa', 'a'])
:call add(tl, [2, '\v(a{3}){2}', 'aaaaaaa', 'aaaaaa', 'aaa'])
:"
:call add(tl, [2, '\v(a{1,2}){2}', 'daaac', 'aaa', 'a'])
:call add(tl, [2, '\v(a{1,3}){2}', 'daaaac', 'aaaa', 'a'])
:call add(tl, [2, '\v(a{1,3}){2}', 'daaaaac', 'aaaaa', 'aa'])
:call add(tl, [2, '\v(a{1,3}){3}', 'daac'])
:call add(tl, [2, '\v(a{1,2}){2}', 'dac'])
:call add(tl, [2, '\v(a+)+', 'daac', 'aa', 'aa'])
:call add(tl, [2, '\v(a+)+', 'aaa', 'aaa', 'aaa'])
:call add(tl, [2, '\v(a+){1,2}', 'aaa', 'aaa', 'aaa'])
:call add(tl, [2, '\v(a+)(a+)', 'aaa', 'aaa', 'aa', 'a'])
:call add(tl, [2, '\v(a{3})+', 'daaaac', 'aaa', 'aaa'])
:call add(tl, [2, '\v(a|b|c)+', 'aacb', 'aacb', 'b'])
:call add(tl, [2, '\v(a|b|c){2}', 'abcb', 'ab', 'b'])
:call add(tl, [2, '\v(abc){2}', 'abcabd', ])
:call add(tl, [2, '\v(abc){2}', 'abdabcabc','abcabc', 'abc'])
:"
:call add(tl, [2, 'a*', 'cc', ''])
:call add(tl, [2, '\v(a*)+', 'cc', ''])
:call add(tl, [2, '\v((ab)+)+', 'ab', 'ab', 'ab', 'ab'])
:call add(tl, [2, '\v(((ab)+)+)+', 'ab', 'ab', 'ab', 'ab', 'ab'])
:call add(tl, [2, '\v(((ab)+)+)+', 'dababc', 'abab', 'abab', 'abab', 'ab'])
:call add(tl, [2, '\v(a{0,2})+', 'cc', ''])
:call add(tl, [2, '\v(a*)+', '', ''])
:call add(tl, [2, '\v((a*)+)+', '', ''])
:call add(tl, [2, '\v((ab)*)+', '', ''])
:call add(tl, [2, '\va{1,3}', 'aab', 'aa'])
:call add(tl, [2, '\va{2,3}', 'abaa', 'aa'])
:"
:call add(tl, [2, '\v((ab)+|c*)+', 'abcccaba', 'abcccab', '', 'ab'])
:call add(tl, [2, '\v(a{2})|(b{3})', 'bbabbbb', 'bbb', '', 'bbb'])
:call add(tl, [2, '\va{2}|b{2}', 'abab'])
:call add(tl, [2, '\v(a)+|(c)+', 'bbacbaacbbb', 'a', 'a'])
:call add(tl, [2, '\vab{2,3}c', 'aabbccccccccccccc', 'abbc'])
:call add(tl, [2, '\vab{2,3}c', 'aabbbccccccccccccc', 'abbbc'])
:call add(tl, [2, '\vab{2,3}cd{2,3}e', 'aabbbcddee', 'abbbcdde'])
:call add(tl, [2, '\va(bc){2}d', 'aabcbfbc' ])
:call add(tl, [2, '\va*a{2}', 'a', ])
:call add(tl, [2, '\va*a{2}', 'aa', 'aa' ])
:call add(tl, [2, '\va*a{2}', 'aaa', 'aaa' ])
:call add(tl, [2, '\va*a{2}', 'bbbabcc', ])
:call add(tl, [2, '\va*b*|a*c*', 'a', 'a'])
:call add(tl, [2, '\va{1}b{1}|a{1}b{1}', ''])
:"
:"submatches
:call add(tl, [2, '\v(a)', 'ab', 'a', 'a'])
:call add(tl, [2, '\v(a)(b)', 'ab', 'ab', 'a', 'b'])
:call add(tl, [2, '\v(ab)(b)(c)', 'abbc', 'abbc', 'ab', 'b', 'c'])
:call add(tl, [2, '\v((a)(b))', 'ab', 'ab', 'ab', 'a', 'b'])
:call add(tl, [2, '\v(a)|(b)', 'ab', 'a', 'a'])
:"
:call add(tl, [2, '\v(a*)+', 'aaaa', 'aaaa', ''])
:call add(tl, [2, 'x', 'abcdef'])
:"
:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
:""""" Simple tests """""""""""""""""""""""""""""""""""""""""""
:""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
:"
:" Search single groups
:call add(tl, [2, 'ab', 'aab', 'ab'])
:call add(tl, [2, 'ab', 'baced'])
:call add(tl, [2, 'ab', '                    ab           ', 'ab'])
:"
:" Search multi-modifiers
:call add(tl, [2, 'x*', 'xcd', 'x'])
:call add(tl, [2, 'x*', 'xxxxxxxxxxxxxxxxsofijiojgf', 'xxxxxxxxxxxxxxxx'])
:" empty match is good
:call add(tl, [2, 'x*', 'abcdoij', ''])
:" no match here
:call add(tl, [2, 'x\+', 'abcdoin'])
:call add(tl, [2, 'x\+', 'abcdeoijdfxxiuhfij', 'xx'])
:call add(tl, [2, 'x\+', 'xxxxx', 'xxxxx'])
:call add(tl, [2, 'x\+', 'abc x siufhiush xxxxxxxxx', 'x'])
:call add(tl, [2, 'x\=', 'x sdfoij', 'x'])
:call add(tl, [2, 'x\=', 'abc sfoij', '']) " empty match is good
:call add(tl, [2, 'x\=', 'xxxxxxxxx c', 'x'])
:call add(tl, [2, 'x\?', 'x sdfoij', 'x'])
:" empty match is good
:call add(tl, [2, 'x\?', 'abc sfoij', ''])
:call add(tl, [2, 'x\?', 'xxxxxxxxxx c', 'x'])
:"
:call add(tl, [2, 'a\{0,0}', 'abcdfdoij', ''])
:" same thing as 'a?'
:call add(tl, [2, 'a\{0,1}', 'asiubid axxxaaa', 'a'])
:" same thing as 'a\{0,1}'
:call add(tl, [2, 'a\{1,0}', 'asiubid axxxaaa', 'a'])
:call add(tl, [2, 'a\{3,6}', 'aa siofuh'])
:call add(tl, [2, 'a\{3,6}', 'aaaaa asfoij afaa', 'aaaaa'])
:call add(tl, [2, 'a\{3,6}', 'aaaaaaaa', 'aaaaaa'])
:call add(tl, [2, 'a\{0}', 'asoiuj', ''])
:call add(tl, [2, 'a\{2}', 'aaaa', 'aa'])
:call add(tl, [2, 'a\{2}', 'iuash fiusahfliusah fiushfilushfi uhsaifuh askfj nasfvius afg aaaa sfiuhuhiushf', 'aa'])
:call add(tl, [2, 'a\{2}', 'abcdefghijklmnopqrestuvwxyz1234567890'])
:" same thing as 'a*'
:call add(tl, [2, 'a\{0,}', 'oij sdigfusnf', ''])
:call add(tl, [2, 'a\{0,}', 'aaaaa aa', 'aaaaa'])
:call add(tl, [2, 'a\{2,}', 'sdfiougjdsafg'])
:call add(tl, [2, 'a\{2,}', 'aaaaasfoij ', 'aaaaa'])
:call add(tl, [2, 'a\{5,}', 'xxaaaaxxx '])
:call add(tl, [2, 'a\{5,}', 'xxaaaaaxxx ', 'aaaaa'])
:call add(tl, [2, 'a\{,0}', 'oidfguih iuhi hiu aaaa', ''])
:call add(tl, [2, 'a\{,5}', 'abcd', 'a'])
:call add(tl, [2, 'a\{,5}', 'aaaaaaaaaa', 'aaaaa'])
:" leading star as normal char when \{} follows
:call add(tl, [2, '^*\{4,}$', '***'])
:call add(tl, [2, '^*\{4,}$', '****', '****'])
:call add(tl, [2, '^*\{4,}$', '*****', '*****'])
:" same thing as 'a*'
:call add(tl, [2, 'a\{}', 'bbbcddiuhfcd', ''])
:call add(tl, [2, 'a\{}', 'aaaaioudfh coisf jda', 'aaaa'])
:"
:call add(tl, [2, 'a\{-0,0}', 'abcdfdoij', ''])
:" anti-greedy version of 'a?'
:call add(tl, [2, 'a\{-0,1}', 'asiubid axxxaaa', ''])
:call add(tl, [2, 'a\{-3,6}', 'aa siofuh'])
:call add(tl, [2, 'a\{-3,6}', 'aaaaa asfoij afaa', 'aaa'])
:call add(tl, [2, 'a\{-3,6}', 'aaaaaaaa', 'aaa'])
:call add(tl, [2, 'a\{-0}', 'asoiuj', ''])
:call add(tl, [2, 'a\{-2}', 'aaaa', 'aa'])
:call add(tl, [2, 'a\{-2}', 'abcdefghijklmnopqrestuvwxyz1234567890'])
:call add(tl, [2, 'a\{-0,}', 'oij sdigfusnf', ''])
:call add(tl, [2, 'a\{-0,}', 'aaaaa aa', ''])
:call add(tl, [2, 'a\{-2,}', 'sdfiougjdsafg'])
:call add(tl, [2, 'a\{-2,}', 'aaaaasfoij ', 'aa'])
:call add(tl, [2, 'a\{-,0}', 'oidfguih iuhi hiu aaaa', ''])
:call add(tl, [2, 'a\{-,5}', 'abcd', ''])
:call add(tl, [2, 'a\{-,5}', 'aaaaaaaaaa', ''])
:" anti-greedy version of 'a*'
:call add(tl, [2, 'a\{-}', 'bbbcddiuhfcd', ''])
:call add(tl, [2, 'a\{-}', 'aaaaioudfh coisf jda', ''])
:"
:" Test groups of characters and submatches
:call add(tl, [2, '\(abc\)*', 'abcabcabc', 'abcabcabc', 'abc'])
:call add(tl, [2, '\(ab\)\+', 'abababaaaaa', 'ababab', 'ab'])
:call add(tl, [2, '\(abaaaaa\)*cd', 'cd', 'cd', ''])
:call add(tl, [2, '\(test1\)\? \(test2\)\?', 'test1 test3', 'test1 ', 'test1', ''])
:call add(tl, [2, '\(test1\)\= \(test2\) \(test4443\)\=', ' test2 test4443 yupiiiiiiiiiii', ' test2 test4443', '', 'test2', 'test4443'])
:call add(tl, [2, '\(\(sub1\) hello \(sub 2\)\)', 'asterix sub1 hello sub 2 obelix', 'sub1 hello sub 2', 'sub1 hello sub 2', 'sub1', 'sub 2'])
:call add(tl, [2, '\(\(\(yyxxzz\)\)\)', 'abcdddsfiusfyyzzxxyyxxzz', 'yyxxzz', 'yyxxzz', 'yyxxzz', 'yyxxzz'])
:call add(tl, [2, '\v((ab)+|c+)+', 'abcccaba', 'abcccab', 'ab', 'ab'])
:call add(tl, [2, '\v((ab)|c*)+', 'abcccaba', 'abcccab', '', 'ab'])
:call add(tl, [2, '\v(a(c*)+b)+', 'acbababaaa', 'acbabab', 'ab', ''])
:call add(tl, [2, '\v(a|b*)+', 'aaaa', 'aaaa', ''])
:"
:" Test greedy-ness and lazy-ness
:call add(tl, [2, 'a\{-2,7}','aaaaaaaaaaaaa', 'aa'])
:call add(tl, [2, 'a\{-2,7}x','aaaaaaaaax', 'aaaaaaax'])
:call add(tl, [2, 'a\{2,7}','aaaaaaaaaaaaaaaaaaaa', 'aaaaaaa'])
:call add(tl, [2, 'a\{2,7}x','aaaaaaaaax', 'aaaaaaax'])
:call add(tl, [2, '\vx(.{-,8})yz(.*)','xayxayzxayzxayz','xayxayzxayzxayz','ayxa','xayzxayz'])
:call add(tl, [2, '\vx(.*)yz(.*)','xayxayzxayzxayz','xayxayzxayzxayz', 'ayxayzxayzxa',''])
:call add(tl, [2, '\v(a{1,2}){-2,3}','aaaaaaa','aaaa','aa'])
:call add(tl, [2, '\v(a{-1,3})+','aa','aa','a'])
:"
:" Test Character classes
:call add(tl, [2, '\d\+e\d\d','test 10e23 fd','10e23'])
:"
:" Test collections and character range []
:call add(tl, [2, '\v[a]', 'abcd', 'a'])
:call add(tl, [2, 'a[bcd]', 'abcd', 'ab'])
:call add(tl, [2, 'a[b-d]', 'acbd', 'ac'])
:call add(tl, [2, '[a-d][e-f][x-x]d', 'cexdxx', 'cexd'])
:call add(tl, [2, '\v[[:alpha:]]+', 'abcdefghijklmnopqrstuvwxyz6','abcdefghijklmnopqrstuvwxyz'])
:call add(tl, [2, '[[:alpha:]\+]', '6x8','x'])
:call add(tl, [2, '[^abc]\+','abcabcabc'])
:call add(tl, [2, '[^abc]','defghiasijvoinasoiunbvb','d'])
:call add(tl, [2, '[^abc]\+','ddddddda','ddddddd'])
:call add(tl, [2, '[^a-d]\+','aaaAAAZIHFNCddd','AAAZIHFNC'])
:call add(tl, [2, '[a-f]*','iiiiiiii',''])
:call add(tl, [2, '[a-f]*','abcdefgh','abcdef'])
:call add(tl, [2, '[^a-f]\+','abcdefgh','gh'])
:call add(tl, [2, '[a-c]\{-3,6}','abcabc','abc'])
:call add(tl, [2, '[^[:alpha:]]\+','abcccadfoij7787ysf287yrnccdu','7787'])
:call add(tl, [2, '[-a]', '-', '-'])
:call add(tl, [2, '[a-]', '-', '-'])
:" filename regexp
:call add(tl, [2, '[-./[:alnum:]_~]\+', 'log13.file', 'log13.file'])
:" special chars
:call add(tl, [2, '[\]\^\-\\]\+', '\^\\\-\---^', '\^\\\-\---^'])
:" collation elem
:call add(tl, [2, '[[.a.]]\+', 'aa', 'aa'])
:" middle of regexp
:call add(tl, [2, 'abc[0-9]*ddd', 'siuhabc ii'])
:call add(tl, [2, 'abc[0-9]*ddd', 'adf abc44482ddd oijs', 'abc44482ddd'])
:call add(tl, [2, '\_[0-9]\+', 'asfi9888u', '9888'])
:call add(tl, [2, '[0-9\n]\+', 'asfi9888u', '9888'])
:call add(tl, [2, '\_[0-9]\+', "asfi\n9888u", "\n9888"])
:call add(tl, [2, '\_f', "  \na ", "\n"])
:call add(tl, [2, '\_f\+', "  \na ", "\na"])
:call add(tl, [2, '[0-9A-Za-z-_.]\+', " @0_a.A-{ ", "0_a.A-"])
:"
:"""" Test start/end of line, start/end of file
:call add(tl, [2, '^a.', "a_\nb ", "a_"])
:call add(tl, [2, '^a.', "b a \na_"])
:call add(tl, [2, '.a$', " a\n "])
:call add(tl, [2, '.a$', " a b\n_a", "_a"])
:call add(tl, [2, '\%^a.', "a a\na", "a "])
:call add(tl, [2, '\%^a', " a \na "])
:call add(tl, [2, '.a\%$', " a\n "])
:call add(tl, [2, '.a\%$', " a\n_a", "_a"])
:"
:"""" Test recognition of some character classes
:call add(tl, [2, '[0-9]', '8', '8'])
:call add(tl, [2, '[^0-9]', '8'])
:call add(tl, [2, '[0-9a-fA-F]*', '0a7', '0a7'])
:call add(tl, [2, '[^0-9A-Fa-f]\+', '0a7'])
:call add(tl, [2, '[a-z_A-Z0-9]\+', 'aso_sfoij', 'aso_sfoij'])
:call add(tl, [2, '[a-z]', 'a', 'a'])
:call add(tl, [2, '[a-zA-Z]', 'a', 'a'])
:call add(tl, [2, '[A-Z]', 'a'])
:call add(tl, [2, '\C[^A-Z]\+', 'ABCOIJDEOIFNSD jsfoij sa', ' jsfoij sa'])
:"
:"""" Tests for \z features
:" match ends at \ze
:call add(tl, [2, 'xx \ze test', 'xx '])
:call add(tl, [2, 'abc\zeend', 'oij abcend', 'abc'])
:call add(tl, [2, 'aa\zebb\|aaxx', ' aabb ', 'aa'])
:call add(tl, [2, 'aa\zebb\|aaxx', ' aaxx ', 'aaxx'])
:call add(tl, [2, 'aabb\|aa\zebb', ' aabb ', 'aabb'])
:call add(tl, [2, 'aa\zebb\|aaebb', ' aabb ', 'aa'])
:" match starts at \zs
:call add(tl, [2, 'abc\zsdd', 'ddabcddxyzt', 'dd'])
:call add(tl, [2, 'aa \zsax', ' ax'])
:call add(tl, [2, 'abc \zsmatch\ze abc', 'abc abc abc match abc abc', 'match'])
:call add(tl, [2, '\v(a \zsif .*){2}', 'a if then a if last', 'if last', 'a if last'])
:call add(tl, [2, '\>\zs.', 'aword. ', '.'])
:"
:"""" Tests for \@= and \& features
:call add(tl, [2, 'abc\@=', 'abc', 'ab'])
:call add(tl, [2, 'abc\@=cd', 'abcd', 'abcd'])
:call add(tl, [2, 'abc\@=', 'ababc', 'ab'])
:" will never match, no matter the input text
:call add(tl, [2, 'abcd\@=e', 'abcd'])
:" will never match
:call add(tl, [2, 'abcd\@=e', 'any text in here ... '])
:call add(tl, [2, '\v(abc)@=..', 'xabcd', 'ab', 'abc'])
:call add(tl, [2, '\(.*John\)\@=.*Bob', 'here is John, and here is B'])
:call add(tl, [2, '\(John.*\)\@=.*Bob', 'John is Bobs friend', 'John is Bob', 'John is Bobs friend'])
:call add(tl, [2, '\<\S\+\())\)\@=', '$((i=i+1))', 'i=i+1', '))'])
:call add(tl, [2, '.*John\&.*Bob', 'here is John, and here is B'])
:call add(tl, [2, '.*John\&.*Bob', 'John is Bobs friend', 'John is Bob'])
:call add(tl, [2, '\v(test1)@=.*yep', 'this is a test1, yep it is', 'test1, yep', 'test1'])
:call add(tl, [2, 'foo\(bar\)\@!', 'foobar'])
:call add(tl, [2, 'foo\(bar\)\@!', 'foo bar', 'foo'])
:call add(tl, [2, 'if \(\(then\)\@!.\)*$', ' if then else'])
:call add(tl, [2, 'if \(\(then\)\@!.\)*$', ' if else ', 'if else ', ' '])
:call add(tl, [2, '\(foo\)\@!bar', 'foobar', 'bar'])
:call add(tl, [2, '\(foo\)\@!...bar', 'foobar'])
:call add(tl, [2, '^\%(.*bar\)\@!.*\zsfoo', ' bar foo '])
:call add(tl, [2, '^\%(.*bar\)\@!.*\zsfoo', ' foo bar '])
:call add(tl, [2, '^\%(.*bar\)\@!.*\zsfoo', ' foo xxx ', 'foo'])
:"
:"""" Combining different tests and features
:call add(tl, [2, '[[:alpha:]]\{-2,6}', '787abcdiuhsasiuhb4', 'ab'])
:call add(tl, [2, '', 'abcd', ''])
:call add(tl, [2, '\v(())', 'any possible text', ''])
:call add(tl, [2, '\v%(ab(xyz)c)', '   abxyzc ', 'abxyzc', 'xyz'])
:call add(tl, [2, '\v(test|)empty', 'tesempty', 'empty', ''])
:call add(tl, [2, '\v(a|aa)(a|aa)', 'aaa', 'aa', 'a', 'a'])
:"
:"""" \%u and friends
:call add(tl, [2, '\%d32', 'yes no', ' '])
:call add(tl, [2, '\%o40', 'yes no', ' '])
:call add(tl, [2, '\%x20', 'yes no', ' '])
:call add(tl, [2, '\%u0020', 'yes no', ' '])
:call add(tl, [2, '\%U00000020', 'yes no', ' '])
:"
:"""" Alternatives, must use first longest match
:call add(tl, [2, 'goo\|go', 'google', 'goo'])
:call add(tl, [2, '\<goo\|\<go', 'google', 'goo'])
:call add(tl, [2, '\<goo\|go', 'google', 'goo'])
:"
:"""" Back references
:call add(tl, [2, '\(\i\+\) \1', ' abc abc', 'abc abc', 'abc'])
:call add(tl, [2, '\(\i\+\) \1', 'xgoo goox', 'goo goo', 'goo'])
:call add(tl, [2, '\(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9', 'xabcddefghiabcddefghix', 'abcddefghiabcddefghi', 'a', 'b', 'c', 'dd', 'e', 'f', 'g', 'h', 'i'])
:"
:"""" Look-behind with limit
:call add(tl, [2, '<\@<=span.', 'xxspanxx<spanyyy', 'spany'])
:call add(tl, [2, '<\@1<=span.', 'xxspanxx<spanyyy', 'spany'])
:call add(tl, [2, '<\@2<=span.', 'xxspanxx<spanyyy', 'spany'])
:call add(tl, [2, '\(<<\)\@<=span.', 'xxspanxxxx<spanxx<<spanyyy', 'spany', '<<'])
:call add(tl, [2, '\(<<\)\@1<=span.', 'xxspanxxxx<spanxx<<spanyyy'])
:call add(tl, [2, '\(<<\)\@2<=span.', 'xxspanxxxx<spanxx<<spanyyy', 'spany', '<<'])
:call add(tl, [2, '\(foo\)\@<!bar.', 'xx foobar1 xbar2 xx', 'bar2'])
:"
:"""" "\_" prepended negated collection matches EOL
:call add(tl, [2, '\_[^8-9]\+', "asfi\n9888", "asfi\n"])
:call add(tl, [2, '\_[^a]\+', "asfi\n9888", "sfi\n9888"])
:"
:"""" Requiring lots of states.
:call add(tl, [2, '[0-9a-zA-Z]\{8}-\([0-9a-zA-Z]\{4}-\)\{3}[0-9a-zA-Z]\{12}', " 12345678-1234-1234-1234-123456789012 ", "12345678-1234-1234-1234-123456789012", "1234-"])
:"
:"
:"""" Run the tests
:"
:for t in tl
:  let re = t[0]
:  let pat = t[1]
:  let text = t[2]
:  let matchidx = 3
:  for engine in [0, 1, 2]
:    if engine == 2 && !re
:      continue
:    endif
:    let &regexpengine = engine
:    try
:      let l = matchlist(text, pat)
:    catch
:      $put ='ERROR: pat: \"' . pat . '\", text: \"' . text . '\", caused an exception: \"' . v:exception . '\"'
:    endtry
:" check the match itself
:    if len(l) == 0 && len(t) > matchidx
:      $put ='ERROR: pat: \"' . pat . '\", text: \"' . text . '\", did not match, expected: \"' . t[matchidx] . '\"'
:    elseif len(l) > 0 && len(t) == matchidx
:      $put ='ERROR: pat: \"' . pat . '\", text: \"' . text . '\", match: \"' . l[0] . '\", expected no match'
:    elseif len(t) > matchidx && l[0] != t[matchidx]
:      $put ='ERROR: pat: \"' . pat . '\", text: \"' . text . '\", match: \"' . l[0] . '\", expected: \"' . t[matchidx] . '\"'
:    else
:      $put ='OK ' . engine . ' - ' . pat
:    endif
:    if len(l) > 0
:"   check all the nine submatches
:      for i in range(1, 9)
:        if len(t) <= matchidx + i
:          let e = ''
:        else
:          let e = t[matchidx + i]
:        endif
:        if l[i] != e
:          $put ='ERROR: pat: \"' . pat . '\", text: \"' . text . '\", submatch ' . i . ': \"' . l[i] . '\", expected: \"' . e . '\"'
:        endif
:      endfor
:      unlet i
:    endif
:  endfor
:endfor
:unlet t tl e l
:"
:" Check that \_[0-9] matching EOL does not break a following \>
:" This only works on a buffer line, not with expression evaluation
/^Find this
/\%#=0\<\(\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\.\)\{3\}\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\>
y$Gop:"
/^Find this
/\%#=1\<\(\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\.\)\{3\}\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\>
y$Gop:"
/^Find this
/\%#=2\<\(\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\.\)\{3\}\(25\_[0-5]\|2\_[0-4]\_[0-9]\|\_[01]\?\_[0-9]\_[0-9]\?\)\>
y$Gop:"
:"
:" Check that using a pattern on two lines doesn't get messed up by using
:" matchstr() with \ze in between.
:set re=0
/^Substitute here
:.+1,.+2s/""/\='"'.matchstr(getline("."), '\d\+\ze<').'"'
/^Substitute here
:.+1,.+2yank
Gop:"
:"
:" Check a pattern with a line break matches in the right position.
/^Multiline
/\S.*\nx
:.yank
y$Gop:"
:"
:" Check a pattern with a look beind crossing a line boundary
/^Behind:
/\(<\_[xy]\+\)\@3<=start
:.yank
Gop:"
:"
:" Check patterns matching cursor position.
:func! Postest()
 new
 call setline(1, ['ffooooo', 'boboooo', 'zoooooo', 'koooooo', 'moooooo', "\t\t\tfoo", 'abababababababfoo', 'bababababababafoo', '********_'])
 call setpos('.', [0, 1, 0, 0])
 s/\%>3c.//g
 call setpos('.', [0, 2, 4, 0])
 s/\%#.*$//g
 call setpos('.', [0, 3, 0, 0])
 s/\%<3c./_/g
 %s/\%4l\%>5c./_/g
 %s/\%6l\%>25v./_/g
 %s/\%>6l\%3c./!/g
 %s/\%>7l\%12c./?/g
 %s/\%>7l\%<9l\%>5v\%<8v./#/g
 1,$yank
 quit!
endfunc
Go-0-:set re=0
:call Postest()
:put
o-1-:set re=1
:call Postest()
:put
o-2-:set re=2
:call Postest()
:put
:"
:" start and end of buffer
/\%^
yeGop:"
50%/\%^..
yeGopA END:"
50%/\%$
"ayb20gg/..\%$
"bybGo"apo"bp:"
:"
:/\%#=1^Results/,$wq! test.out
ENDTEST

Find this:
localnet/192.168.0.1

Substitute here:
<T="">Ta 5</Title>
<T="">Ac 7</Title>

Multiline:
abc
def
ghi
xjk
lmn

Behind:
asdfasd<yyy
xxstart1
asdfasd<yy
xxxstart2
asdfasd<yy
xxstart3

Results of test64: