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special case: recognize '[^\n]' and make it as fast as '.'

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R=rsc
DELTA=25  (23 added, 1 deleted, 1 changed)
OCL=32793
CL=32799
This commit is contained in:
Rob Pike 2009-08-05 14:40:34 -07:00
parent 3776f31144
commit 5a4d431dd1
2 changed files with 24 additions and 2 deletions
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2
src/pkg/regexp/all_test.go
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@ -27,6 +27,7 @@ var good_re = []string{
`[]`,
`[abc]`,
`[^1234]`,
`[^\n]`,
}
// TODO: nice to do this with a map
@ -72,6 +73,7 @@ var matches = []tester {
tester{ `[a-z]+`, "abcd", vec{0,4} },
tester{ `[^a-z]+`, "ab1234cd", vec{2,6} },
tester{ `[a\-\]z]+`, "az]-bcz", vec{0,4} },
tester{ `[^\n]+`, "abcd\n", vec{0,4} },
tester{ `[日本語]+`, "日本語日本語", vec{0,18} },
tester{ `()`, "", vec{0,0, 0,0} },
tester{ `(a)`, "a", vec{0,1, 0,1} },