empty textblock not correctly handled in RegEx panel about regexplain HOT 5 CLOSED

Thanks for the detailed and easy to reproduce bug report! There was an issue with how I handled groups that start and end at the same point in the input string, which I think I've fixed.

If you can please try the branch fix-issue-9 and let me know that it's resolved, that would be great. (Use devtools::install_github("gadenbuie/regexplain@fix-issue-9")).

You should see results similar to this:

Regarding your second issue, unfortunately I haven't been able to get the newer version of RStudio to work on my laptop (MacOS), so I can't diagnose it at this time. I can replicate the issue with RStudio 1.0 or 1.1 (on Mac/Unix). FYI, the expected behavior is for the following to be written to the console:

pattern <- "2017" # perl=TRUE
replacement <- "2018"

from regexplain.

I have tried your fix-issue-9 fix and this gives the display you mentioned above.
So I would say: issue resolved.

However this only works if I have used the library(bindrcpp) statement in the session before.
This is not specific for your fix-issue-9 fix because it also occurred in the standard version.
If bindrcpp is not present it is apparently loaded by the applet. The attached screenprint shows a warning (NB I understand why I get the warning) in the RegEx panel and none of the selected groups are indicated (but the Output panel is okay: i.e as in the screenprint in the first message).

RegEx panel with message:

Regarding the other issue: you probably meant to say I can not replicate the issue with RStudio 1.0 or 1.1 (on Mac/Unix).? Meaning you have no errors there?

from regexplain.

Yes, you’re right I meant to say I can’t reproduce the issue in RStudio 1.0 and 1.1.

Thanks for following up! I’ll try to look into this a bit more and see if I can reproduce the issues you’re seeing.

from regexplain.

My remarks in earlier comments where all related to RStudio Version 1.2.502
Just now I installed version 1.1.442 (apparently the latest regular version) and tried your fix-issue-9 fix.

The Send RegEx to Console button works here indeed and the issue with groups that start and end at the same point is indeed resolved. But also with 1.1.442 the execution of the library(bindrcpp) statement before using regexplain is necessary to see the groups in the RegEx panel.

from regexplain.

Glad to hear the fix and the buttons are working in RStudio 1.1. I've opened #10 to track future issues with RStudio and version 1.2.

I can't reproduce the issue with bindrcpp. That package is imported by dplyr and I'm thinking that maybe having installed the binary version of bindrcpp on Windows with R 3.4.1 when the binary was built against R 3.4.4 might be the culprit. I don't have easy access to a Windows machine available, so I can't reproduce. But I'm going to remove the dependency on dplyr (#11), which shouldn't be hard to do and will resolve this issue.

from regexplain.