microsoft / microsoft/TypeScript

Ignore Specific Error [AGAIN]

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Description

Yes, this is a duplicate of #11051, but that issue is closed and this NEEDS to be addressed.

People use Typescript for more than just Javascript compilation now. There are tons of transpilers that convert TS to all sorts of useful languages. Typescript must have a proper way to disable certain error codes project-wide.

My specific issue right now is that I'm using TypescriptToLua, a Typescript transpiler that produces lua code, and Typescript throws a fit whenever I try to use mathematical operators on classes. This would make sense if I was compiling to Javascript, but I'm not, but I'm forced to annotate every line with @ts-ignore (unrealistic) or suffer through constant reports of TS2362 and TS2363 in my console (infuriating).

There could easily be an ignoreErrors: number[] in the .tsconfig file that provides this functionality. The only thing stopping it from existing is stubborness. Well designed errors that never cause issues are a nice dream, but realistically there will always be use cases that are not met by the error handler, and the user should have the power to suppress invalid warnings.

A short example of my issue:

Typescript that will be converted using TypescriptToLua:

/** @customConstructor vector.new */
declare class Vector {
	constructor(x: number, y?: number, z?: number);
}

const v = new Vector(1, 2, 3);
const vSquared = v * v;

Generated (valid) lua code:

--[[ Generated with https://github.com/TypeScriptToLua/TypeScriptToLua ]]
v = vector.new(1, 2, 3)
vSquared = v * v

Obnoxious compiler output:

main.ts:9:18 - error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type.

9 const vSquared = v * v;
                   ~

main.ts:9:22 - error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type.

9 const vSquared = v * v;
                       ~

Thank you for your time, I hope that this issue can be seen as what is is, which is a frustrating lack of user control and agency.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Review TypeScript's tsconfig compiler options and diagnostic handling, starting with the requested project-wide suppression of TS2362 and TS2363. Compare the closed duplicate issue #11051; done means defining and implementing an agreed configuration mechanism that suppresses selected diagnostic codes without requiring per-line @ts-ignore.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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