github.com/riscv/riscv-go@v0.0.0-20200123204226-124ebd6fcc8e/src/regexp/testdata/nullsubexpr.dat (about)

     1  NOTE	null subexpression matches : 2002-06-06
     2  
     3  E	(a*)*		a		(0,1)(0,1)
     4  #E	SAME		x		(0,0)(0,0)
     5  E	SAME		x		(0,0)(?,?)	RE2/Go
     6  E	SAME		aaaaaa		(0,6)(0,6)
     7  E	SAME		aaaaaax		(0,6)(0,6)
     8  E	(a*)+		a		(0,1)(0,1)
     9  E	SAME		x		(0,0)(0,0)
    10  E	SAME		aaaaaa		(0,6)(0,6)
    11  E	SAME		aaaaaax		(0,6)(0,6)
    12  E	(a+)*		a		(0,1)(0,1)
    13  E	SAME		x		(0,0)
    14  E	SAME		aaaaaa		(0,6)(0,6)
    15  E	SAME		aaaaaax		(0,6)(0,6)
    16  E	(a+)+		a		(0,1)(0,1)
    17  E	SAME		x		NOMATCH
    18  E	SAME		aaaaaa		(0,6)(0,6)
    19  E	SAME		aaaaaax		(0,6)(0,6)
    20  
    21  E	([a]*)*		a		(0,1)(0,1)
    22  #E	SAME		x		(0,0)(0,0)
    23  E	SAME		x		(0,0)(?,?)	RE2/Go
    24  E	SAME		aaaaaa		(0,6)(0,6)
    25  E	SAME		aaaaaax		(0,6)(0,6)
    26  E	([a]*)+		a		(0,1)(0,1)
    27  E	SAME		x		(0,0)(0,0)
    28  E	SAME		aaaaaa		(0,6)(0,6)
    29  E	SAME		aaaaaax		(0,6)(0,6)
    30  E	([^b]*)*	a		(0,1)(0,1)
    31  #E	SAME		b		(0,0)(0,0)
    32  E	SAME		b		(0,0)(?,?)	RE2/Go
    33  E	SAME		aaaaaa		(0,6)(0,6)
    34  E	SAME		aaaaaab		(0,6)(0,6)
    35  E	([ab]*)*	a		(0,1)(0,1)
    36  E	SAME		aaaaaa		(0,6)(0,6)
    37  E	SAME		ababab		(0,6)(0,6)
    38  E	SAME		bababa		(0,6)(0,6)
    39  E	SAME		b		(0,1)(0,1)
    40  E	SAME		bbbbbb		(0,6)(0,6)
    41  E	SAME		aaaabcde	(0,5)(0,5)
    42  E	([^a]*)*	b		(0,1)(0,1)
    43  E	SAME		bbbbbb		(0,6)(0,6)
    44  #E	SAME		aaaaaa		(0,0)(0,0)
    45  E	SAME		aaaaaa		(0,0)(?,?)	RE2/Go
    46  E	([^ab]*)*	ccccxx		(0,6)(0,6)
    47  #E	SAME		ababab		(0,0)(0,0)
    48  E	SAME		ababab		(0,0)(?,?)	RE2/Go
    49  
    50  E	((z)+|a)*	zabcde		(0,2)(1,2)
    51  
    52  #{E	a+?		aaaaaa		(0,1)	no *? +? mimimal match ops
    53  #E	(a)		aaa		(0,1)(0,1)
    54  #E	(a*?)		aaa		(0,0)(0,0)
    55  #E	(a)*?		aaa		(0,0)
    56  #E	(a*?)*?		aaa		(0,0)
    57  #}
    58  
    59  B	\(a*\)*\(x\)		x	(0,1)(0,0)(0,1)
    60  B	\(a*\)*\(x\)		ax	(0,2)(0,1)(1,2)
    61  B	\(a*\)*\(x\)		axa	(0,2)(0,1)(1,2)
    62  B	\(a*\)*\(x\)\(\1\)	x	(0,1)(0,0)(0,1)(1,1)
    63  B	\(a*\)*\(x\)\(\1\)	ax	(0,2)(1,1)(1,2)(2,2)
    64  B	\(a*\)*\(x\)\(\1\)	axa	(0,3)(0,1)(1,2)(2,3)
    65  B	\(a*\)*\(x\)\(\1\)\(x\)	axax	(0,4)(0,1)(1,2)(2,3)(3,4)
    66  B	\(a*\)*\(x\)\(\1\)\(x\)	axxa	(0,3)(1,1)(1,2)(2,2)(2,3)
    67  
    68  #E	(a*)*(x)		x	(0,1)(0,0)(0,1)
    69  E	(a*)*(x)		x	(0,1)(?,?)(0,1)	RE2/Go
    70  E	(a*)*(x)		ax	(0,2)(0,1)(1,2)
    71  E	(a*)*(x)		axa	(0,2)(0,1)(1,2)
    72  
    73  E	(a*)+(x)		x	(0,1)(0,0)(0,1)
    74  E	(a*)+(x)		ax	(0,2)(0,1)(1,2)
    75  E	(a*)+(x)		axa	(0,2)(0,1)(1,2)
    76  
    77  E	(a*){2}(x)		x	(0,1)(0,0)(0,1)
    78  E	(a*){2}(x)		ax	(0,2)(1,1)(1,2)
    79  E	(a*){2}(x)		axa	(0,2)(1,1)(1,2)