Tslint: no-unused-variable without use of `this`

[leocaseiro]

Bug Report

Hi, I believe there's an error with the no-unused-variable when not using with this.

You can see my example in Angular with constructor when I'm not using this;

• __TSLint version__: 5.2.0
• __TypeScript version__: 2.3.2
• __Running TSLint via__: Angular CLI (ng lint)

TypeScript code being linted

@Component({
})
class MyComponent {
    constructor(private myService: MyService) {
        myService.method(); // works on TS but fail on tslint
        // this.myService.method(); // tslint pass
    }
}

with tslint.json configuration:

{
    "rules": {
        "no-unused-variable": true
    }
}

Actual behavior

Property 'myService' is declared but never used.

Expected behavior

Should pass

[ajafff]

The behavior is correct. The private modifier creates a property with the same name as the parameter.
You're only using the parameter and not the property. Hence the error message Property myService is declared but never used.