xref: /openbsd-src/regress/lib/libc/regex/tests (revision 8d4875efd4ecd36355f3a5d3cc1dd262105867ac)

#	$OpenBSD: tests,v 1.10 2021/04/02 14:20:57 otto Exp $
#	$NetBSD: tests,v 1.5 1995/04/20 22:40:00 cgd Exp $

# regular expression test set
# Lines are at least three fields, separated by one or more tabs.  "" stands
# for an empty field.  First field is an RE.  Second field is flags.  If
# C flag given, regcomp() is expected to fail, and the third field is the
# error name (minus the leading REG_).
#
# Otherwise it is expected to succeed, and the third field is the string to
# try matching it against.  If there is no fourth field, the match is
# expected to fail.  If there is a fourth field, it is the substring that
# the RE is expected to match.  If there is a fifth field, it is a comma-
# separated list of what the subexpressions should match, with - indicating
# no match for that one.  In both the fourth and fifth fields, a (sub)field
# starting with @ indicates that the (sub)expression is expected to match
# a null string followed by the stuff after the @; this provides a way to
# test where null strings match.  The character `N' in REs and strings
# is newline, `S' is space, `T' is tab, `Z' is NUL.
#
# The full list of flags:
#	-	placeholder, does nothing
#	b	RE is a BRE, not an ERE
#	&	try it as both an ERE and a BRE
#	C	regcomp() error expected, third field is error name
#	i	REG_ICASE
#	m	("mundane") REG_NOSPEC
#	s	REG_NOSUB (not really testable)
#	n	REG_NEWLINE
#	^	REG_NOTBOL
#	$	REG_NOTEOL
#	#	REG_STARTEND (see below)
#	p	REG_PEND
#
# For REG_STARTEND, the start/end offsets are those of the substring
# enclosed in ().

# basics
a		&	a	a
abc		&	abc	abc
abc|de		-	abc	abc
a|b|c		-	abc	a

# parentheses and perversions thereof
a(b)c		-	abc	abc
a\(b\)c		b	abc	abc
a(		C	EPAREN
a(		b	a(	a(
a\(		-	a(	a(
a\(		bC	EPAREN
a\(b		bC	EPAREN
a(b		C	EPAREN
a(b		b	a(b	a(b
# gag me with a right parenthesis -- 1003.2 goofed here (my fault, partly)
a)		-	a)	a)
)		-	)	)
# end gagging (in a just world, those *should* give EPAREN)
a)		b	a)	a)
a\)		bC	EPAREN
\)		bC	EPAREN
a()b		-	ab	ab
a\(\)b		b	ab	ab

# anchoring and REG_NEWLINE
^abc$		&	abc	abc
^b		&	abc
a^b		-	a^b
a^b		b	a^b	a^b
a$b		-	a$b
a$b		b	a$b	a$b
^		&	abc	@abc
$		&	abc	@
^$		&	""	@
$^		-	""	@
\($\)\(^\)	b	""	@
# stop retching, those are legitimate (although disgusting)
^^		-	""	@
$$		-	""	@
b$		&	abNc
b$		&n	abNc	b
^b		&	aNbNc
b$		&	aNbNc
^a		&n	aNb	a
^b		&n	abc
^b$		&n	aNbNc	b
^$		&n	aNNb	@Nb
^$		n	abc
^$		n	abcN	@
$^		n	aNNb	@Nb
\($\)\(^\)	bn	aNNb	@Nb
^^		n^	aNNb	@Nb
$$		n	aNNb	@NN
^a		&^	a
a$		&$	a
^b		&^	abc
^b		&^	aNb
^a		&^n	aNb
^b		&^n	abc
^b		&^n	aNb	b
a$		&$n	bNa
b$		&$n	bNa	b
a*(^b$)c*	-	b	b
a*\(^b$\)c*	b	b	b

# certain syntax errors and non-errors
|		C	EMPTY
|		b	|	|
*		C	BADRPT
*		b	*	*
+		C	BADRPT
?		C	BADRPT
""		&C	EMPTY
()		-	abc	@abc
\(\)		b	abc	@abc
a||b		C	EMPTY
|ab		C	EMPTY
ab|		C	EMPTY
(|a)b		C	EMPTY
(a|)b		C	EMPTY
(*a)		C	BADRPT
(+a)		C	BADRPT
(?a)		C	BADRPT
({1}a)		C	BADRPT
\(\{1\}a\)	bC	BADRPT
(a|*b)		C	BADRPT
(a|+b)		C	BADRPT
(a|?b)		C	BADRPT
(a|{1}b)	C	BADRPT
^*		C	BADRPT
^*		b	*	*
^+		C	BADRPT
^?		C	BADRPT
^{1}		C	BADRPT
^\{1\}		bC	BADRPT

# metacharacters, backslashes
a.c		&	abc	abc
a[bc]d		&	abd	abd
a\*c		&	a*c	a*c
a\\b		&	a\b	a\b
a\\\*b		&	a\*b	a\*b
a\bc		&	abc	abc
a\		&C	EESCAPE
a\\bc		&	a\bc	a\bc
\{		bC	BADRPT
a\[b		&	a[b	a[b
a[b		&C	EBRACK
# trailing $ is a peculiar special case for the BRE code
a$		&	a	a
a$		&	a$
a\$		&	a
a\$		&	a$	a$
a\\$		&	a
a\\$		&	a$
a\\$		&	a\$
a\\$		&	a\	a\

# back references, ugh
a\(b\)\2c	bC	ESUBREG
a\(b\1\)c	bC	ESUBREG
a\(b*\)c\1d	b	abbcbbd	abbcbbd	bb
a\(b*\)c\1d	b	abbcbd
a\(b*\)c\1d	b	abbcbbbd
^\(.\)\1	b	abc
a\([bc]\)\1d	b	abcdabbd	abbd	b
a\(\([bc]\)\2\)*d	b	abbccd	abbccd
a\(\([bc]\)\2\)*d	b	abbcbd
# actually, this next one probably ought to fail, but the spec is unclear
a\(\(b\)*\2\)*d		b	abbbd	abbbd
# here is a case that no NFA implementation does right
\(ab*\)[ab]*\1	b	ababaaa	ababaaa	a
# check out normal matching in the presence of back refs
\(a\)\1bcd	b	aabcd	aabcd
\(a\)\1bc*d	b	aabcd	aabcd
\(a\)\1bc*d	b	aabd	aabd
\(a\)\1bc*d	b	aabcccd	aabcccd
\(a\)\1bc*[ce]d	b	aabcccd	aabcccd
^\(a\)\1b\(c\)*cd$	b	aabcccd	aabcccd
\(b*\)\(a*\1\)*	b	ab	a
\([^_]*\)\(_*\1\)*	b	foo_foo_bar_bar_bar_baz	foo_foo	foo,_foo
\([^_]*\)\(_*\1\)*	b	bar_bar_bar_baz	bar_bar_bar	bar,_bar
\([^_]*\)\(_*\1\)*	b	foo_bar_baz	foo	foo
\(.*\)\1	b	""	""
\(.*\)\1	b	a	""
\(.*\)\1	b	aa	aa
\(.*\)\1	b	aaa	aa
\(.*\)\1	b	aaaa	aaaa
\([^_]*\)\1	b	""	""
\([^_]*\)\1	b	a	""
\([^_]*\)\1	b	aa	aa
\([^_]*\)\1	b	aaa	aa
\([^_]*\)\1	b	aaaa	aaaa
foo\(.*\)bar\1	b	foolbarl	foolbarl	l
foo\(.*\)bar\1	b	foobar	foobar	""
\(\(.\)b\)*\1	b	aba
\(\(.\)b\)*\1	b	abba
\(\(.\)b\)*\1	b	abbba
\(\(.\)b\)*\1	b	abbbba	bbbb	bb,b
\(\(.\)b\)*\1	b	abbbbba	abbbbb	bb,b
\(\(.\)b\)*\1	b	abbbbbba	abbbbb	bb,b
\(\(.\)b\)*\1	b	abbbbbbbbbbbbbba	abbbbbbbbbbbbb	bb,b
\(\(.\)b\)*\1	b	abbbbbbbbbbbbbbba	abbbbbbbbbbbbbbb	bb,b
# these used to segfault, buffer underflow in engine.c, backref()
\(^a\)*\(b.\)\2	b^	sbxbxe	bxbx	-,bx
\([[:<:]]a\)*\(b.\)\2	b^	sbxbxe	bxbx	-,bx

# ordinary repetitions
ab*c		&	abc	abc
ab+c		-	abc	abc
ab?c		-	abc	abc
a\(*\)b		b	a*b	a*b
a\(**\)b	b	ab	ab
a\(***\)b	bC	BADRPT
*a		b	*a	*a
**a		b	a	a
***a		bC	BADRPT

# the dreaded bounded repetitions
{		&	{	{
{abc		&	{abc	{abc
{1		C	BADRPT
{1}		C	BADRPT
a{b		&	a{b	a{b
a{1}b		-	ab	ab
a\{1\}b		b	ab	ab
a{1,}b		-	ab	ab
a\{1,\}b	b	ab	ab
a{1,2}b		-	aab	aab
a\{1,2\}b	b	aab	aab
a{1		C	EBRACE
a\{1		bC	EBRACE
a{1a		C	EBRACE
a\{1a		bC	EBRACE
a{1a}		C	BADBR
a\{1a\}		bC	BADBR
a{,2}		-	a{,2}	a{,2}
a\{,2\}		bC	BADBR
a{,}		-	a{,}	a{,}
a\{,\}		bC	BADBR
a{1,x}		C	BADBR
a\{1,x\}	bC	BADBR
a{1,x		C	EBRACE
a\{1,x		bC	EBRACE
a{300}		C	BADBR
a\{300\}	bC	BADBR
a{1,0}		C	BADBR
a\{1,0\}	bC	BADBR
ab{0,0}c	-	abcac	ac
ab\{0,0\}c	b	abcac	ac
ab{0,1}c	-	abcac	abc
ab\{0,1\}c	b	abcac	abc
ab{0,3}c	-	abbcac	abbc
ab\{0,3\}c	b	abbcac	abbc
ab{1,1}c	-	acabc	abc
ab\{1,1\}c	b	acabc	abc
ab{1,3}c	-	acabc	abc
ab\{1,3\}c	b	acabc	abc
ab{2,2}c	-	abcabbc	abbc
ab\{2,2\}c	b	abcabbc	abbc
ab{2,4}c	-	abcabbc	abbc
ab\{2,4\}c	b	abcabbc	abbc
((a{1,10}){1,10}){1,10}	-	a	a	a,a

# multiple repetitions
a**		&C	BADRPT
a++		C	BADRPT
a??		C	BADRPT
a*+		C	BADRPT
a*?		C	BADRPT
a+*		C	BADRPT
a+?		C	BADRPT
a?*		C	BADRPT
a?+		C	BADRPT
a{1}{1}		C	BADRPT
a*{1}		C	BADRPT
a+{1}		C	BADRPT
a?{1}		C	BADRPT
a{1}*		C	BADRPT
a{1}+		C	BADRPT
a{1}?		C	BADRPT
a*{b}		-	a{b}	a{b}
a\{1\}\{1\}	bC	BADRPT
a*\{1\}		bC	BADRPT
a\{1\}*		bC	BADRPT

# brackets, and numerous perversions thereof
a[b]c		&	abc	abc
a[ab]c		&	abc	abc
a[^ab]c		&	adc	adc
a[]b]c		&	a]c	a]c
a[[b]c		&	a[c	a[c
a[-b]c		&	a-c	a-c
a[^]b]c		&	adc	adc
a[^-b]c		&	adc	adc
a[b-]c		&	a-c	a-c
a[b		&C	EBRACK
a[]		&C	EBRACK
a[1-3]c		&	a2c	a2c
a[3-1]c		&C	ERANGE
a[1-3-5]c	&C	ERANGE
a[[.-.]--]c	&	a-c	a-c
a[1-		&C	ERANGE
a[[.		&C	EBRACK
a[[.x		&C	EBRACK
a[[.x.		&C	EBRACK
a[[.x.]		&C	EBRACK
a[[.x.]]	&	ax	ax
a[[.x,.]]	&C	ECOLLATE
a[[.one.]]b	&	a1b	a1b
a[[.notdef.]]b	&C	ECOLLATE
a[[.].]]b	&	a]b	a]b
a[[:alpha:]]c	&	abc	abc
a[[:notdef:]]c	&C	ECTYPE
a[[:		&C	EBRACK
a[[:alpha	&C	EBRACK
a[[:alpha:]	&C	EBRACK
a[[:alpha,:]	&C	ECTYPE
a[[:]:]]b	&C	ECTYPE
a[[:-:]]b	&C	ECTYPE
a[[:alph:]]	&C	ECTYPE
a[[:alphabet:]]	&C	ECTYPE
[[:alnum:]]+	-	-%@a0X-	a0X
[[:alpha:]]+	-	-%@aX0-	aX
[[:blank:]]+	-	aSSTb	SST
[[:cntrl:]]+	-	aNTb	NT
[[:digit:]]+	-	a019b	019
[[:graph:]]+	-	Sa%bS	a%b
[[:lower:]]+	-	AabC	ab
[[:print:]]+	-	NaSbN	aSb
[[:punct:]]+	-	S%-&T	%-&
[[:space:]]+	-	aSNTb	SNT
[[:upper:]]+	-	aBCd	BC
[[:xdigit:]]+	-	p0f3Cq	0f3C
a[[=b=]]c	&	abc	abc
a[[=		&C	EBRACK
a[[=b		&C	EBRACK
a[[=b=		&C	EBRACK
a[[=b=]		&C	EBRACK
a[[=b,=]]	&C	ECOLLATE
a[[=one=]]b	&	a1b	a1b

# complexities
a(((b)))c	-	abc	abc
a(b|(c))d	-	abd	abd
a(b*|c)d	-	abbd	abbd
# just gotta have one DFA-buster, of course
a[ab]{20}	-	aaaaabaaaabaaaabaaaab	aaaaabaaaabaaaabaaaab
# and an inline expansion in case somebody gets tricky
a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab]	-	aaaaabaaaabaaaabaaaab	aaaaabaaaabaaaabaaaab
# and in case somebody just slips in an NFA...
a[ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab][ab](wee|week)(knights|night)	-	aaaaabaaaabaaaabaaaabweeknights	aaaaabaaaabaaaabaaaabweeknights
# fish for anomalies as the number of states passes 32
12345678901234567890123456789	-	a12345678901234567890123456789b	12345678901234567890123456789
123456789012345678901234567890	-	a123456789012345678901234567890b	123456789012345678901234567890
1234567890123456789012345678901	-	a1234567890123456789012345678901b	1234567890123456789012345678901
12345678901234567890123456789012	-	a12345678901234567890123456789012b	12345678901234567890123456789012
123456789012345678901234567890123	-	a123456789012345678901234567890123b	123456789012345678901234567890123
# and one really big one, beyond any plausible word width
1234567890123456789012345678901234567890123456789012345678901234567890	-	a1234567890123456789012345678901234567890123456789012345678901234567890b	1234567890123456789012345678901234567890123456789012345678901234567890
# fish for problems as brackets go past 8
[ab][cd][ef][gh][ij][kl][mn]	-	xacegikmoq	acegikm
[ab][cd][ef][gh][ij][kl][mn][op]	-	xacegikmoq	acegikmo
[ab][cd][ef][gh][ij][kl][mn][op][qr]	-	xacegikmoqy	acegikmoq
[ab][cd][ef][gh][ij][kl][mn][op][q]	-	xacegikmoqy	acegikmoq

# subtleties of matching
abc		&	xabcy	abc
a\(b\)?c\1d	b	acd
aBc		i	Abc	Abc
a[Bc]*d		i	abBCcd	abBCcd
0[[:upper:]]1	&i	0a1	0a1
0[[:lower:]]1	&i	0A1	0A1
a[^b]c		&i	abc
a[^b]c		&i	aBc
a[^b]c		&i	adc	adc
[a]b[c]		-	abc	abc
[a]b[a]		-	aba	aba
[abc]b[abc]	-	abc	abc
[abc]b[abd]	-	abd	abd
a(b?c)+d	-	accd	accd
(wee|week)(knights|night)	-	weeknights	weeknights
(we|wee|week|frob)(knights|night|day)	-	weeknights	weeknights
a[bc]d		-	xyzaaabcaababdacd	abd
a[ab]c		-	aaabc	abc
abc		s	abc	abc
a*		&	b	@b

# Let's have some fun -- try to match a C comment.
# first the obvious, which looks okay at first glance...
/\*.*\*/	-	/*x*/	/*x*/
# but...
/\*.*\*/	-	/*x*/y/*z*/	/*x*/y/*z*/
# okay, we must not match */ inside; try to do that...
/\*([^*]|\*[^/])*\*/	-	/*x*/	/*x*/
/\*([^*]|\*[^/])*\*/	-	/*x*/y/*z*/	/*x*/
# but...
/\*([^*]|\*[^/])*\*/	-	/*x**/y/*z*/	/*x**/y/*z*/
# and a still fancier version, which does it right (I think)...
/\*([^*]|\*+[^*/])*\*+/	-	/*x*/	/*x*/
/\*([^*]|\*+[^*/])*\*+/	-	/*x*/y/*z*/	/*x*/
/\*([^*]|\*+[^*/])*\*+/	-	/*x**/y/*z*/	/*x**/
/\*([^*]|\*+[^*/])*\*+/	-	/*x****/y/*z*/	/*x****/
/\*([^*]|\*+[^*/])*\*+/	-	/*x**x*/y/*z*/	/*x**x*/
/\*([^*]|\*+[^*/])*\*+/	-	/*x***x/y/*z*/	/*x***x/y/*z*/

# subexpressions
a(b)(c)d	-	abcd	abcd	b,c
a(((b)))c	-	abc	abc	b,b,b
a(b|(c))d	-	abd	abd	b,-
a(b*|c|e)d	-	abbd	abbd	bb
a(b*|c|e)d	-	acd	acd	c
a(b*|c|e)d	-	ad	ad	@d
a(b?)c		-	abc	abc	b
a(b?)c		-	ac	ac	@c
a(b+)c		-	abc	abc	b
a(b+)c		-	abbbc	abbbc	bbb
a(b*)c		-	ac	ac	@c
(a|ab)(bc([de]+)f|cde)	-	abcdef	abcdef	a,bcdef,de
# the regression tester only asks for 9 subexpressions
a(b)(c)(d)(e)(f)(g)(h)(i)(j)k	-	abcdefghijk	abcdefghijk	b,c,d,e,f,g,h,i,j
a(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)l	-	abcdefghijkl	abcdefghijkl	b,c,d,e,f,g,h,i,j,k
a([bc]?)c	-	abc	abc	b
a([bc]?)c	-	ac	ac	@c
a([bc]+)c	-	abc	abc	b
a([bc]+)c	-	abcc	abcc	bc
a([bc]+)bc	-	abcbc	abcbc	bc
a(bb+|b)b	-	abb	abb	b
a(bbb+|bb+|b)b	-	abb	abb	b
a(bbb+|bb+|b)b	-	abbb	abbb	bb
a(bbb+|bb+|b)bb	-	abbb	abbb	b
(.*).*		-	abcdef	abcdef	abcdef
(a*)*		-	bc	@b	@b

# do we get the right subexpression when it is used more than once?
a(b|c)*d	-	ad	ad	-
a(b|c)*d	-	abcd	abcd	c
a(b|c)+d	-	abd	abd	b
a(b|c)+d	-	abcd	abcd	c
a(b|c?)+d	-	ad	ad	@d
a(b|c?)+d	-	abcd	abcd	@d
a(b|c){0,0}d	-	ad	ad	-
a(b|c){0,1}d	-	ad	ad	-
a(b|c){0,1}d	-	abd	abd	b
a(b|c){0,2}d	-	ad	ad	-
a(b|c){0,2}d	-	abcd	abcd	c
a(b|c){0,}d	-	ad	ad	-
a(b|c){0,}d	-	abcd	abcd	c
a(b|c){1,1}d	-	abd	abd	b
a(b|c){1,1}d	-	acd	acd	c
a(b|c){1,2}d	-	abd	abd	b
a(b|c){1,2}d	-	abcd	abcd	c
a(b|c){1,}d	-	abd	abd	b
a(b|c){1,}d	-	abcd	abcd	c
a(b|c){2,2}d	-	acbd	acbd	b
a(b|c){2,2}d	-	abcd	abcd	c
a(b|c){2,4}d	-	abcd	abcd	c
a(b|c){2,4}d	-	abcbd	abcbd	b
a(b|c){2,4}d	-	abcbcd	abcbcd	c
a(b|c){2,}d	-	abcd	abcd	c
a(b|c){2,}d	-	abcbd	abcbd	b
a(b+|((c)*))+d	-	abd	abd	@d,@d,-
a(b+|((c)*))+d	-	abcd	abcd	@d,@d,-

# check out the STARTEND option
^[abc]		&#	a(b)c	b
^[abc]		&#	a(xb)c
^[abc]		&#	aN(b)c	b
^[abc]		&n#	a(b)c	b
^[abc]		&n#	a(xb)c
^[abc]		&n#	aN(b)c	b
^[abc]		&^#	a(b)c
^[abc]		&^#	a(xb)c
^[abc]		&^#	aN(b)c
^[abc]		&n^#	a(b)c
^[abc]		&n^#	a(xb)c
^[abc]		&n^#	aN(b)c	b
[abc]		&#	a(d)c
[abc]		&#	a(bc)d	b
[abc]		&#	a(dc)d	c
.		&#	a()c
b.*c		&#	b(bc)c	bc
b.*		&#	b(bc)c	bc
.*c		&#	b(bc)c	bc

# plain strings, with the NOSPEC flag
abc		m	abc	abc
abc		m	xabcy	abc
abc		m	xyz
a*b		m	aba*b	a*b
a*b		m	ab
""		mC	EMPTY

# cases involving NULs
aZb		&	a	a
aZb		&p	a
aZb		&p#	(aZb)	aZb
aZ*b		&p#	(ab)	ab
a.b		&#	(aZb)	aZb
a.*		&#	(aZb)c	aZb

# word boundaries (ick)
[[:<:]]a	&	a	a
\<a		&	a	a
[[:<:]]a	&	ba
\<a		&	ba
[[:<:]]a	&	-a	a
\<a		&	-a	a
[[:<:]]a	&	Na	a
\<a		&	Na	a
[[:<:]]a	&n	a	a
\<a		&n	a	a
[[:<:]]a	&n	ba
\<a		&n	ba
[[:<:]]a	&n	-a	a
\<a		&n	-a	a
[[:<:]]a	&n	Na	a
\<a		&n	Na	a
[[:<:]]a	&^	a
\<a		&^	a
[[:<:]]a	&^	ba
\<a		&^	ba
[[:<:]]a	&^	-a	a
\<a		&^	-a	a
[[:<:]]a	&^	Na	a
\<a		&^	Na	a
[[:<:]]a	&n^	a
\<a		&n^	a
[[:<:]]a	&n^	ba
\<a		&n^	ba
[[:<:]]a	&n^	-a	a
\<a		&n^	-a	a
[[:<:]]a	&n^	Na	a
\<a		&n^	Na	a
[[:<:]]b	&#	a(b)c	b
\<b		&#	a(b)c	b
[[:<:]]b	&#	a(xb)c
\<b		&#	a(xb)c
[[:<:]]b	&#	-(b)c	b
\<b		&#	-(b)c	b
[[:<:]]b	&#	aN(b)c	b
\<b		&#	aN(b)c	b
[[:<:]]b	&n#	a(b)c	b
\<b		&n#	a(b)c	b
[[:<:]]b	&n#	a(xb)c
\<b		&n#	a(xb)c
[[:<:]]b	&n#	-(b)c	b
\<b		&n#	-(b)c	b
[[:<:]]b	&n#	aN(b)c	b
\<b		&n#	aN(b)c	b
[[:<:]]b	&^#	a(b)c
\<b		&^#	a(b)c
[[:<:]]b	&^#	a(xb)c
\<b		&^#	a(xb)c
[[:<:]]b	&^#	-(b)c	b
\<b		&^#	-(b)c	b
[[:<:]]b	&^#	aN(b)c	b
\<b		&^#	aN(b)c	b
[[:<:]]b	&n^#	a(b)c
\<b		&n^#	a(b)c
[[:<:]]b	&n^#	a(xb)c
\<b		&n^#	a(xb)c
[[:<:]]b	&n^#	-(b)c	b
\<b		&n^#	-(b)c	b
[[:<:]]b	&n^#	aN(b)c	b
\<b		&n^#	aN(b)c	b
a[[:>:]]	&	a	a
a\>		&	a	a
a[[:>:]]	&	ab
a\>		&	ab
a[[:>:]]	&	a-	a
a\>		&	a-	a
[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc	abc
\<a.c\>			&	axcd-dayc-dazce-abc	abc
[[:<:]]a.c[[:>:]]	&	axcd-dayc-dazce-abc-q	abc
\<a.c\>			&	axcd-dayc-dazce-abc-q	abc
[[:<:]]a.c[[:>:]]	&	axc-dayc-dazce-abc	axc
\<a.c\>			&	axc-dayc-dazce-abc	axc
[[:<:]]b.c[[:>:]]	&	a_bxc-byc_d-bzc-q	bzc
\<b.c\>			&	a_bxc-byc_d-bzc-q	bzc
[[:<:]].x..[[:>:]]	&	y_xa_-_xb_y-_xc_-axdc	_xc_
\<.x..\>		&	y_xa_-_xb_y-_xc_-axdc	_xc_
[[:<:]]a_b[[:>:]]	&	x_a_b
\<a_b\>			&	x_a_b

# past problems, and suspected problems
(A[1])|(A[2])|(A[3])|(A[4])|(A[5])|(A[6])|(A[7])|(A[8])|(A[9])|(A[A])	-	A1	A1
abcdefghijklmnop	i	abcdefghijklmnop	abcdefghijklmnop
abcdefghijklmnopqrstuv	i	abcdefghijklmnopqrstuv	abcdefghijklmnopqrstuv
(ALAK)|(ALT[AB])|(CC[123]1)|(CM[123]1)|(GAMC)|(LC[23][EO ])|(SEM[1234])|(SL[ES][12])|(SLWW)|(SLF )|(SLDT)|(VWH[12])|(WH[34][EW])|(WP1[ESN])	-	CC11	CC11
CC[13]1|a{21}[23][EO][123][Es][12]a{15}aa[34][EW]aaaaaaa[X]a	-	CC11	CC11
Char \([a-z0-9_]*\)\[.*	b	Char xyz[k	Char xyz[k	xyz
a?b	-	ab	ab
-\{0,1\}[0-9]*$	b	-5	-5

# FreeBSD PR 130504
(.|())(b)	-	ab	ab
(()|.)(b)	-	ab	ab

# Some BRE cases where \{0,\} makes a backref go wrong, as reported by Michael Paoli
Y*\(x\)\1	b	YYxx	YYxx
Y\{2,\}\(x\)\1	b	YYxx	YYxx
# Fails currently
#Y\{0,\}\(x\)\1	b	YYxx	YYxx
Y\{0,\}\(x\)	b	YYxx	YYx
Y\{2,\}x\{1,\}	b	YYxx	YYxx
Y\{2,\}x\{0,\}z	b	YYxxz	YYxxz
Y\{0,\}x\{0,\}z	b	YYxxz	YYxxz
Y\{2,\}\(xy\)\1	b	YYxyxy	YYxyxy
# Fails currently
#Y\{0,\}\(xy\)\1	b	YYxyxy	YYxyxy
Y*\(xy\)\1	b	YYxyxy	YYxyxy
Y\{0,\}\(xy\)xy	b	YYxyxy	YYxyxy