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regexp: document that it is linear in the input size.

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Fixes #7488.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/78050043
This commit is contained in:
Rob Pike 2014-03-25 11:17:30 +11:00
parent 132e816734
commit c790b029e6
1 changed files with 8 additions and 0 deletions
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8
src/pkg/regexp/regexp.go
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@ -11,6 +11,14 @@
// For an overview of the syntax, run
// godoc regexp/syntax
//
// The regexp implementation provided by this package is
// guaranteed to run in time linear in the size of the input.
// (This is a property not guaranteed by most open source
// implementations of regular expressions.) For more information
// about this property, see
// http://swtch.com/~rsc/regexp/regexp1.html
// or any book about automata theory.
//
// All characters are UTF-8-encoded code points.
//
// There are 16 methods of Regexp that match a regular expression and identify