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grep: add "perfect" smart case detection

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This commit removes the previous smart case detection logic and replaces
it with detection based on the regex AST. This particular AST is a faithful
representation of the concrete syntax, which lets us be very precise in
how we handle it.

Closes #851
This commit is contained in:
Andrew Gallant
2018-03-13 21:43:23 -04:00
parent cd08707c7c
commit 42b8132d0a
4 changed files with 203 additions and 49 deletions
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CHANGELOG.md
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@@ -43,6 +43,8 @@ Bug fixes:
Support backslash escapes in globs.
* [BUG #832](https://github.com/BurntSushi/ripgrep/issues/832):
Clarify usage instructions for `-f/--file` flag.
* [BUG #851](https://github.com/BurntSushi/ripgrep/issues/851):
Fix `-S/--smart-case` detection once and for all.
* [BUG #852](https://github.com/BurntSushi/ripgrep/issues/852):
Be robust with respect to `ENOMEM` errors returned by `mmap`.
* [BUG #853](https://github.com/BurntSushi/ripgrep/issues/853):