-
Notifications
You must be signed in to change notification settings - Fork 445
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
search: skip dfa for anchored pats with captures
The DFA can't produce captures, but is still faster than the Pike VM NFA, so the normal approach to finding capture groups is to look for the entire match with the DFA and then run the NFA on the substring of the input that matched. In cases where the regex in anchored, the match always starts at the beginning of the input, so there is never any point to trying the DFA first. The DFA can still be useful for rejecting inputs which are not in the language of the regular expression, but anchored regex with capture groups are most commonly used in a parsing context, so it seems like a fair trade-off. Fixes #348
- Loading branch information
1 parent
ba3cf03
commit 8138366
Showing
3 changed files
with
126 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters