Unused generic type causing compilation error

[peterreisz]

I'm trying to use a newer version of Rambda with a strict ts-config in an angular project and I've got this compilation error:

ERROR: node_modules/rambda/_ts-toolbelt/src/Iteration/Format.ts:23:62 - error TS6133: 'IMap' is declared but its value is never read.

23 export type Format<I extends Iteration, fmt extends Formats, IMap extends Map = NumberMap> = {
                                                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Had to go back to version 5.5

[selfrefactor]

Thank you for reporting this bug.

Can you share link to the Angular project or the strict config as I can see the bug for myself?

[peterreisz]

It's a proprietary project which I cannot share, but you can try it on a minimum project without angular too:

package.json

{
  "name": "rambda-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "typescript": "^3.9.7"
  },
  "dependencies": {
    "rambda": "^5.9.0"
  }
}

tsconfig.json

{
    "compilerOptions": {
        "noUnusedLocals": true,
        "noUnusedParameters": true
    },
    "files": ["test.ts"]
}

test.ts

import { defaultTo } from 'rambda';

console.log(defaultTo('foo', undefined));

build it with: npx tsc

[selfrefactor]

Thank you - that is sufficient info. I managed to reproduce it and I opened issue with TS-toolbelt library as the problem comes from there: millsp/ts-toolbelt#133

[selfrefactor]

So ts-toolbelt fixed this issue, but later commits brake it again. I had to allow to connect Rambda to specific commit of ts-toolbelt and I can claim that the issue is fixed. Expect it with upcoming 5.10.0 version.

[selfrefactor]

I am closing this issue as the fix is published with version 5.10.0