1# subexpressions
2a(b)(c)d	-	abcd	abcd	b,c
3a(((b)))c	-	abc	abc	b,b,b
4a(b|(c))d	-	abd	abd	b,-
5a(b*|c|e)d	-	abbd	abbd	bb
6a(b*|c|e)d	-	acd	acd	c
7a(b*|c|e)d	-	ad	ad	@d
8a(b?)c		-	abc	abc	b
9a(b?)c		-	ac	ac	@c
10a(b+)c		-	abc	abc	b
11a(b+)c		-	abbbc	abbbc	bbb
12a(b*)c		-	ac	ac	@c
13(a|ab)(bc([de]+)f|cde)	-	abcdef	abcdef	a,bcdef,de
14# Begin FreeBSD
15a\(b\|c\)d	b	ab|cd	ab|cd	b|c
16# End FreeBSD
17# the regression tester only asks for 9 subexpressions
18a(b)(c)(d)(e)(f)(g)(h)(i)(j)k	-	abcdefghijk	abcdefghijk	b,c,d,e,f,g,h,i,j
19a(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)l	-	abcdefghijkl	abcdefghijkl	b,c,d,e,f,g,h,i,j,k
20a([bc]?)c	-	abc	abc	b
21a([bc]?)c	-	ac	ac	@c
22a([bc]+)c	-	abc	abc	b
23a([bc]+)c	-	abcc	abcc	bc
24a([bc]+)bc	-	abcbc	abcbc	bc
25a(bb+|b)b	-	abb	abb	b
26a(bbb+|bb+|b)b	-	abb	abb	b
27a(bbb+|bb+|b)b	-	abbb	abbb	bb
28a(bbb+|bb+|b)bb	-	abbb	abbb	b
29(.*).*		-	abcdef	abcdef	abcdef
30(a*)*		-	bc	@b	@b
31
32# do we get the right subexpression when it is used more than once?
33a(b|c)*d	-	ad	ad	-
34a(b|c)*d	-	abcd	abcd	c
35a(b|c)+d	-	abd	abd	b
36a(b|c)+d	-	abcd	abcd	c
37a(b|c?)+d	-	ad	ad	@d
38a(b|c?)+d	-	abcd	abcd	@d
39a(b|c){0,0}d	-	ad	ad	-
40a(b|c){0,1}d	-	ad	ad	-
41a(b|c){0,1}d	-	abd	abd	b
42a(b|c){0,2}d	-	ad	ad	-
43a(b|c){0,2}d	-	abcd	abcd	c
44a(b|c){0,}d	-	ad	ad	-
45a(b|c){0,}d	-	abcd	abcd	c
46a(b|c){1,1}d	-	abd	abd	b
47a(b|c){1,1}d	-	acd	acd	c
48a(b|c){1,2}d	-	abd	abd	b
49a(b|c){1,2}d	-	abcd	abcd	c
50a(b|c){1,}d	-	abd	abd	b
51a(b|c){1,}d	-	abcd	abcd	c
52a(b|c){2,2}d	-	acbd	acbd	b
53a(b|c){2,2}d	-	abcd	abcd	c
54a(b|c){2,4}d	-	abcd	abcd	c
55a(b|c){2,4}d	-	abcbd	abcbd	b
56a(b|c){2,4}d	-	abcbcd	abcbcd	c
57a(b|c){2,}d	-	abcd	abcd	c
58a(b|c){2,}d	-	abcbd	abcbd	b
59a(b+|((c)*))+d	-	abd	abd	@d,@d,-
60a(b+|((c)*))+d	-	abcd	abcd	@d,@d,-
61