False positive for unused vars inside decorator arguments

[yyx990803]

What version of TypeScript are you using?
2.6.1

What version of typescript-eslint-parser are you using?
12.0.0

What code were you trying to parse?

import { Component, Vue } from 'vue-property-decorator';
import HelloWorld from './components/HelloWorld.vue';

@Component({
  components: {
    HelloWorld
  }
})
export default class App extends Vue {}

What did you expect to happen?
With eslint-plugin-typescript's typescript/no-unused-vars rule enabled, should lint without errors.

What happened?

error: 'HelloWorld' is defined but never used (no-unused-vars)

It looks like the expression in a decorator's argument position is not taken into context when determining unused vars. Also, when using eslint --fix, code inside decorator arguments are sometimes not formatted correctly.

[corbinu]

@yyx990803 I believe this is an issue with https://github.com/nzakas/eslint-plugin-typescript

[alexcouret]

Any update on this? I still have this issue, using the most up to date versions of the plugin / parser.

[JamesHenry]

Thanks for reporting, @yyx990803! This needs to be addressed in the plugin. It would be fantastic if one of the people affected by this issue could contribute to it.

[JamesHenry]

Closing as this is really a bug report for the custom rule in the plugin and an issue has already been opened there. Thanks!