Writing Regex in Scala Parser Combinators

Question
1

When trying to write a regex of the form :
"""[A-Z]_[a-zA-Z]+""".r

The IDE outputs a red underline under the .r keyword.

Could you possibly explain what might be the problem please?

Thanks a lot and good day :slight_smile:

2

Which Scala version and which IDE are you using?

BTW, the .r is not a keyword, it’s just a normal (extension) method on String. See StringOps

1 Like
3

Thanks for your help.

My Scala version is 2.13.4 and I am using the IntelliJ IDE.

Thanks a lot and good day :slight_smile:

4

Did you tried compiling the code with a real compiler, like a build tool (e.g. sbt)?

If no, try it and see, it should just compile; IntelliJ has fame of producing false warnings.
If it doesn’t, then it may help to include the full error as well as the surrounding code here.

5

Thanks for your help.

Is there any particular IDE which you would prefer please ?

Thanks a lot and good day :slight_smile:

6

I personally like to use metals with vscode.

The good things are: it is fast and produces correct diagnostics since it is using a real compiler under the hood, also since I use it together with sbt as the bsp then the compilation is shared which is great.

The bad things are:

  • Its getting started experience is more complex than the one of IntelliJ (especially if you are also new to the language and do not know yet what sbt is).
  • Not sure how well it works on Windows, this doesn’t affect me since I am using WSL 2 but still this may be a problem for some people.
  • Smaller feature set compared with IntelliJ.
1 Like
7

Most people I know use IntelliJ IDEA. The false errors can be annoying, but usually they are no big deal.

1 Like
8

PĂĄ torsdag 28. januar 2021 kl. 14:43:23, skrev Gianluca via Scala Users <[email protected]>:

| gzah
January 28 |

  • | - |

Thanks for your help.

Is there any particular IDE which you would prefer please ?

Thanks a lot and good day :slight_smile:

Note that IntelliJ also uses a “real compiler” when compiling. It’s when IntelliJ IDEA is performing code-inspection (highlighting etc) that it sometimes misses, but IMO the benefits of IntelliJ far outwieghts this.

1 Like