re-builder-x - Perl Development Environment
Description: Perl Development Environment

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## 12 Regexp building and testing tool

If you have not use `re-builder`, please try it. The tool is quite simple and useful, you just input regexp in the *RE-Builder* buffer, the matched part in the buffer where the command is called will be highlighted.

`re-builder-x.el` extend the regexp syntax to perl or any other languages. To enable perl regexp syntax, you have to change the syntax to perl first. The command is `reb-change-syntax`, which is bound to C-c TAB.

In consideration of efficiency, if you make some changes in the buffer, the regexp will not apply in the new text unless you send current buffer to perl process again. You can do that by using command `reb-perl-send-buffer` which bound to C-c C-a.

All commands for re-builder are available for perl syntax.