00644821de
In a pattern like a*b a naive attempt to match will take quadratic time on an input that contains all "a"s an no "b". To improve that case, the regexp compiler detects that a match will require a "b" and checks the input for a "b" to enable linear-time failure. That optimization mishandled `(?!...)` and `(?<!...)` patterns, treating the must-not-match subpatterns as things that must match. So, (regexp-match "a*(?!b)" "aaaxy") returned false, because the input doesn't contain "b". Thie commit repairs the optimization. Closes #1468 |
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| racket | ||
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| .gitignore | ||
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| appveyor.yml | ||
| INSTALL.txt | ||
| Makefile | ||
| README.md | ||
This is the source code for the core of Racket. See "INSTALL.txt" for full information on building Racket.
To build the full Racket distribution from this repository, run make
in the top-level directory. To build the Minimal Racket, run make base.
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License
Racket Copyright (c) 2010-2016 PLT Design Inc.
Racket is distributed under the GNU Lesser General Public License (LGPL). This implies that you may link Racket into proprietary applications, provided you follow the rules stated in the LGPL. You can also modify Racket; if you distribute a modified version, you must distribute it under the terms of the LGPL, which in particular states that you must release the source code for the modified software.
See racket/src/COPYING_LESSER.txt for more information.