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Unicode char code \u{code} not recognized when it contains letter #358

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tayflo opened this issue May 5, 2020 · 1 comment · May be fixed by #471
Open

Unicode char code \u{code} not recognized when it contains letter #358

tayflo opened this issue May 5, 2020 · 1 comment · May be fixed by #471

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@tayflo
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tayflo commented May 5, 2020

Hello there. First of all thanks a lot for RegExr, it's such a great and easy-to-use tool, it's almost a daily companion for me 👍

Description

I noticed a little bug: using unicode flag, unicode escaped characters that contains letters in their code don't print properly in the explanation box (both in the "Explain" tab in the tools box at the bottom, and in the expression input box on top).

Example

Looking for character \u{0020} (/\u{0020}/u), it matches perfectly space character, no problem.

Looking for character \u{002A} (/\u{002A}/u)

  1. it matches asterisk (*) characters in the text box, "Replace", "List", "Details" tools tab (no prob)
    BUT
  2. it displays the following error message in the "Explain" tab and the Expression box:

\u ERROR: Invalid escape sequence.

(And I know that brackets are not needed for four-char long unicode codes and \u002A works fine, but I use them for five-char long ones and the bug is the same.)

Thanks again for your time 🙂
@iansan5653
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I wrote a library a while back that might be helpful for resolving this depending on how the escape sequences are being handled - https://github.com/iansan5653/unraw.

stevenwdv added a commit to stevenwdv/regexr that referenced this issue Aug 11, 2022
@stevenwdv
Fix \u{...} not recognized when it contains a letter
5f333a5 
Closes gskinner#358
@stevenwdv stevenwdv linked a pull request Aug 11, 2022 that will close this issue
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Fix \u{...} not recognized when it contains a letter stevenwdv/regexr
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@iansan5653 @tayflo