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NOTE regex implementation categorization 2004-05-31
?E aa* xaxaax (1,2) POSITION=leftmost
; POSITION=bug
?E (a*)(ab)*(b*) abc (0,2)(0,1)(?,?)(1,2) ASSOCIATIVITY=right
|E (a*)(ab)*(b*) abc (0,2)(0,0)(0,2)(2,2) ASSOCIATIVITY=left
; ASSOCIATIVITY=bug
?E ((a*)(ab)*)((b*)(a*)) aba (0,3)(0,2)(0,0)(0,2)(2,3)(2,2)(2,3) SUBEXPRESSION=precedence
|E ((a*)(ab)*)((b*)(a*)) aba (0,3)(0,1)(0,1)(?,?)(1,3)(1,2)(2,3) SUBEXPRESSION=grouping
; SUBEXPRESSION=bug
?E (...?.?)* xxxxxx (0,6)(4,6) REPEAT_LONGEST=first
|E (...?.?)* xxxxxx (0,6)(2,6) REPEAT_LONGEST=last
|E (...?.?)* xxxxxx OK REPEAT_LONGEST=unknown
; REPEAT_LONGEST=bug
?E (a|ab)(bc|c) abcabc (0,3)(0,2)(2,3) EXPECTED
|E (a|ab)(bc|c) abcabc (0,3)(0,1)(1,3) BUG=alternation-order
; BUG=alternation-order-UNKNOWN
?E (aba|a*b)(aba|a*b) ababa (0,5)(0,2)(2,5) EXPECTED
|E (aba|a*b)(aba|a*b) ababa (0,4)(0,3)(3,4) BUG=first-match
; BUG=unknown-match
?B a\(b\)*\1 a NOMATCH EXPECTED
|B a\(b\)*\1 a (0,1) BUG=nomatch-match
|B a\(b\)*\1 abab (0,2)(1,2) # BUG=repeat-any
; BUG=nomatch-match-UNKNOWN
?E (a*){2} xxxxx (0,0)(0,0) EXPECTED
|E (a*){2} xxxxx (5,5)(5,5) BUG=range-null
; BUG=range-null-UNKNOWN
?B a\(b\)*\1 abab NOMATCH EXPECTED
|B a\(b\)*\1 abab (0,1) # BUG=nomatch-match
|B a\(b\)*\1 abab (0,2)(1,2) BUG=repeat-any
; BUG=repeat-any-UNKNOWN
?E (a*)* a (0,1)(0,1) EXPECTED
|E (a*)* ax (0,1)(0,1) BUG=repeat-null-unknown
|E (a*)* a (0,1)(1,1) BUG=repeat-null
; BUG=repeat-null-UNKNOWN
?E (aba|a*b)* ababa (0,5)(2,5) EXPECTED
|E (aba|a*b)* ababa (0,5)(3,4) BUG=repeat-short
|E (aba|a*b)* ababa (0,4)(3,4) # LENGTH=first
; BUG=repeat-short-UNKNOWN
?E (a(b)?)+ aba (0,3)(2,3) EXPECTED
|E (a(b)?)+ aba (0,3)(2,3)(1,2) BUG=repeat-artifact
; BUG=repeat-artifact-UNKNOWN
?B \(a\(b\)*\)*\2 abab NOMATCH EXPECTED
|B \(a\(b\)*\)*\2 abab (0,4)(2,3)(1,2) BUG=repeat-artifact-nomatch
; BUG=repeat-artifact-nomatch-UNKNOWN
?E (a?)((ab)?)(b?)a?(ab)?b? abab (0,4)(0,1)(1,1)(?,?)(1,2)(2,4) BUG=subexpression-first
|E .*(.*) ab (0,2)(2,2) EXPECTED
|E .*(.*) ab (0,2)(0,2) BUG=subexpression-first
; BUG=subexpression-first-UNKNOWN
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