final project - import problem

[icrnoma...@gmail.com]

In my main file I imported:

import Text.ParserCombinators.Parsec

import Text.ParserCombinators.Parsec.Expr

import Text.ParserCombinators.Parsec.Language

import qualified Text.ParserCombinators.Parsec.Token as Token

which I need for my parser and run command cabal install parsec.

But when i compile it a get error message "failed to load interface Text.ParserCombinator.Parser, Text.ParserCombinators....".

I updated cabal and stack, install again parsec but nothing helps.

Can someone help?

[Jasmin Zukić]

You can try adding " - parsec  " into the package.yaml file

There was a recent change in ghc that uses that file instead of stack.yaml (only on some templates)

[Luka Hadžiegrić]

Hm... try to create a new project by running `stack new project_name` (and make sure you have stack installed). Than put your code in the `lib` folder, and add that source file (actually, module name) to `exposed-modules` under `library` section in `project_name.cabal` file. Also, add `parsec` as a dependency in `build-depends` section of the `.cabal` file and delete `package.yaml` file (don't delete `stack.yaml`).

Also, here it says `.Parser` instead of `.Parsec` so maybe check your code for typos :

Text.ParserCombinator.Parser

On Saturday, January 13, 2018 at 6:04:14 PM UTC+1, icrnoma...@gmail.com wrote:

[Luka Hadžiegrić]

After you've done all that run `stack build`, this might take a while if you are doing it for the first time. And after that you can load your code in the repl by running `stack repl`.

[Luka Hadžiegrić]

And run that within the project folder of course :D

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