1NOTE	implicit vs. explicit repetitions : 2009-02-02
2
3# Glenn Fowler <gsf@research.att.com>
4# conforming matches (column 4) must match one of the following BREs
5#	NOMATCH
6#	(0,.)\((\(.\),\(.\))(?,?)(\2,\3)\)*
7#	(0,.)\((\(.\),\(.\))(\2,\3)(?,?)\)*
8# i.e., each 3-tuple has two identical elements and one (?,?)
9
10E	((..)|(.))				NULL		NOMATCH
11E	((..)|(.))((..)|(.))			NULL		NOMATCH
12E	((..)|(.))((..)|(.))((..)|(.))		NULL		NOMATCH
13
14E	((..)|(.)){1}				NULL		NOMATCH
15E	((..)|(.)){2}				NULL		NOMATCH
16E	((..)|(.)){3}				NULL		NOMATCH
17
18E	((..)|(.))*				NULL		(0,0)
19
20E	((..)|(.))				a		(0,1)(0,1)(?,?)(0,1)
21E	((..)|(.))((..)|(.))			a		NOMATCH
22E	((..)|(.))((..)|(.))((..)|(.))		a		NOMATCH
23
24E	((..)|(.)){1}				a		(0,1)(0,1)(?,?)(0,1)
25E	((..)|(.)){2}				a		NOMATCH
26E	((..)|(.)){3}				a		NOMATCH
27
28E	((..)|(.))*				a		(0,1)(0,1)(?,?)(0,1)
29
30E	((..)|(.))				aa		(0,2)(0,2)(0,2)(?,?)
31E	((..)|(.))((..)|(.))			aa		(0,2)(0,1)(?,?)(0,1)(1,2)(?,?)(1,2)
32E	((..)|(.))((..)|(.))((..)|(.))		aa		NOMATCH
33
34E	((..)|(.)){1}				aa		(0,2)(0,2)(0,2)(?,?)
35E	((..)|(.)){2}				aa		(0,2)(1,2)(?,?)(1,2)
36E	((..)|(.)){3}				aa		NOMATCH
37
38E	((..)|(.))*				aa		(0,2)(0,2)(0,2)(?,?)
39
40E	((..)|(.))				aaa		(0,2)(0,2)(0,2)(?,?)
41E	((..)|(.))((..)|(.))			aaa		(0,3)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)
42E	((..)|(.))((..)|(.))((..)|(.))		aaa		(0,3)(0,1)(?,?)(0,1)(1,2)(?,?)(1,2)(2,3)(?,?)(2,3)
43
44E	((..)|(.)){1}				aaa		(0,2)(0,2)(0,2)(?,?)
45#E	((..)|(.)){2}				aaa		(0,3)(2,3)(?,?)(2,3)
46E	((..)|(.)){2}				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go
47E	((..)|(.)){3}				aaa		(0,3)(2,3)(?,?)(2,3)
48
49#E	((..)|(.))*				aaa		(0,3)(2,3)(?,?)(2,3)
50E	((..)|(.))*				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go
51
52E	((..)|(.))				aaaa		(0,2)(0,2)(0,2)(?,?)
53E	((..)|(.))((..)|(.))			aaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
54E	((..)|(.))((..)|(.))((..)|(.))		aaaa		(0,4)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)(3,4)(?,?)(3,4)
55
56E	((..)|(.)){1}				aaaa		(0,2)(0,2)(0,2)(?,?)
57E	((..)|(.)){2}				aaaa		(0,4)(2,4)(2,4)(?,?)
58#E	((..)|(.)){3}				aaaa		(0,4)(3,4)(?,?)(3,4)
59E	((..)|(.)){3}				aaaa		(0,4)(3,4)(0,2)(3,4)	RE2/Go
60
61E	((..)|(.))*				aaaa		(0,4)(2,4)(2,4)(?,?)
62
63E	((..)|(.))				aaaaa		(0,2)(0,2)(0,2)(?,?)
64E	((..)|(.))((..)|(.))			aaaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
65E	((..)|(.))((..)|(.))((..)|(.))		aaaaa		(0,5)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)(4,5)(?,?)(4,5)
66
67E	((..)|(.)){1}				aaaaa		(0,2)(0,2)(0,2)(?,?)
68E	((..)|(.)){2}				aaaaa		(0,4)(2,4)(2,4)(?,?)
69#E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(?,?)(4,5)
70E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go
71
72#E	((..)|(.))*				aaaaa		(0,5)(4,5)(?,?)(4,5)
73E	((..)|(.))*				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go
74
75E	((..)|(.))				aaaaaa		(0,2)(0,2)(0,2)(?,?)
76E	((..)|(.))((..)|(.))			aaaaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
77E	((..)|(.))((..)|(.))((..)|(.))		aaaaaa		(0,6)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)(4,6)(4,6)(?,?)
78
79E	((..)|(.)){1}				aaaaaa		(0,2)(0,2)(0,2)(?,?)
80E	((..)|(.)){2}				aaaaaa		(0,4)(2,4)(2,4)(?,?)
81E	((..)|(.)){3}				aaaaaa		(0,6)(4,6)(4,6)(?,?)
82
83E	((..)|(.))*				aaaaaa		(0,6)(4,6)(4,6)(?,?)
84
85NOTE	additional repetition tests graciously provided by Chris Kuklewicz www.haskell.org 2009-02-02
86
87# These test a bug in OS X / FreeBSD / NetBSD, and libtree.
88# Linux/GLIBC gets the {8,} and {8,8} wrong.
89
90:HA#100:E	X(.?){0,}Y	X1234567Y	(0,9)(7,8)
91:HA#101:E	X(.?){1,}Y	X1234567Y	(0,9)(7,8)
92:HA#102:E	X(.?){2,}Y	X1234567Y	(0,9)(7,8)
93:HA#103:E	X(.?){3,}Y	X1234567Y	(0,9)(7,8)
94:HA#104:E	X(.?){4,}Y	X1234567Y	(0,9)(7,8)
95:HA#105:E	X(.?){5,}Y	X1234567Y	(0,9)(7,8)
96:HA#106:E	X(.?){6,}Y	X1234567Y	(0,9)(7,8)
97:HA#107:E	X(.?){7,}Y	X1234567Y	(0,9)(7,8)
98:HA#108:E	X(.?){8,}Y	X1234567Y	(0,9)(8,8)
99#:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(7,8)
100:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
101#:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(7,8)
102:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
103#:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(7,8)
104:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
105#:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(7,8)
106:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
107#:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(7,8)
108:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
109#:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(7,8)
110:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
111#:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(7,8)
112:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
113#:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(7,8)
114:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
115:HA#118:E	X(.?){8,8}Y	X1234567Y	(0,9)(8,8)
116
117# These test a fixed bug in my regex-tdfa that did not keep the expanded
118# form properly grouped, so right association did the wrong thing with
119# these ambiguous patterns (crafted just to test my code when I became
120# suspicious of my implementation).  The first subexpression should use
121# "ab" then "a" then "bcd".
122
123# OS X / FreeBSD / NetBSD badly fail many of these, with impossible
124# results like (0,6)(4,5)(6,6).
125
126:HA#260:E	(a|ab|c|bcd){0,}(d*)	ababcd	(0,1)(0,1)(1,1)
127:HA#261:E	(a|ab|c|bcd){1,}(d*)	ababcd	(0,1)(0,1)(1,1)
128:HA#262:E	(a|ab|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
129:HA#263:E	(a|ab|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
130:HA#264:E	(a|ab|c|bcd){4,}(d*)	ababcd	NOMATCH
131:HA#265:E	(a|ab|c|bcd){0,10}(d*)	ababcd	(0,1)(0,1)(1,1)
132:HA#266:E	(a|ab|c|bcd){1,10}(d*)	ababcd	(0,1)(0,1)(1,1)
133:HA#267:E	(a|ab|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
134:HA#268:E	(a|ab|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
135:HA#269:E	(a|ab|c|bcd){4,10}(d*)	ababcd	NOMATCH
136:HA#270:E	(a|ab|c|bcd)*(d*)	ababcd	(0,1)(0,1)(1,1)
137:HA#271:E	(a|ab|c|bcd)+(d*)	ababcd	(0,1)(0,1)(1,1)
138
139# The above worked on Linux/GLIBC but the following often fail.
140# They also trip up OS X / FreeBSD / NetBSD:
141
142#:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(3,6)(6,6)
143:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
144#:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(3,6)(6,6)
145:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
146#:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
147:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
148#:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
149:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
150:HA#284:E	(ab|a|c|bcd){4,}(d*)	ababcd	NOMATCH
151#:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(3,6)(6,6)
152:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
153#:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(3,6)(6,6)
154:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
155#:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
156:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
157#:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
158:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
159:HA#289:E	(ab|a|c|bcd){4,10}(d*)	ababcd	NOMATCH
160#:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(3,6)(6,6)
161:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
162#:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(3,6)(6,6)
163:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
164