Feature: introduce variable

[ishmum123]

PR for #414 .

Would appreciate any help or collaboration...

[rikvdkleij]

@ishmum123 thanks for your contribution. But we can only implement this proper when the layout is properly parsed. A start is made in the layout lexer branch but still a lot of work.
I also have to rebase master on the branch which is also not trivial.

[ishmum123]

@rikvdkleij if you could list out the steps of lexer, I might be able to help. Also I felt the project currently lacks a proper testing pattern. I am willing to help out

[rikvdkleij]

@ishmum123 thanks! Except for the rebase there are no clear steps. It’s a matter of getting the parser in a shape that it will parse Haskell code while individual expressions, where clauses, etc are identifiable on whatever level.

[ishmum123]

I am currently trying to Intellij Elm. Does the parsing over there help somehow?

[rikvdkleij]

Yes, the Elm plugin solution helped us for the solution in the layoutlexer branch. To continue I have to rebase that branch on master.

[ishmum123]

I am trying to rebase the branch locally. Working incrementally at the moment, i.e. - rebasing a few commits at a time until I hit a commit with high number of conflicts. Might take some time...

[rikvdkleij]

@ishmum123 don’t know if you’re still trying to rebase but you can ignore the conflicts of files inside the gen folder and HaskellParser.java because those are generated.
If not then I will give it a try again 😄

[ishmum123]

I was out of town for a while... I would start working on it today, God willing

[ishmum123]

This is my take on it - #646 . Feel free to completely discard it if it causes more harm than good

[rikvdkleij]

@ishmum123 thanks! I will take a look soon

[rikvdkleij]

@ishmum123 it looks okay. Had to make some small changes and regenerate the parser code to get it compiled.

The HaskellParsingTest is failing because of different element for newline.

[ishmum123]

@rikvdkleij can you please push your changes to the branch? I can look into the HaskellParsingTest on top of that?

[rikvdkleij]

@ishmum123 I’ve pushed my changes to your branch already. It’s a PR

Thanks but be aware that the new PSI tree still has to be defined by us.

[ishmum123]

@rikvdkleij let's carry the discussion over to the other PR?

[rikvdkleij]

@ishmum123 yes, good idea

[ishmum123]

@rikvdkleij left a comment there. Would be great if you could address that please

[CodeByAidan]

2 year later, ouch!