Before You File a Proposal Please Confirm You Have Done The Following...

• I havesearched for related issues and found none that match my proposal.
• I have searched thecurrent rule list and found no rules that match my proposal.
• I haveread the FAQ and my problem is not listed.

My proposal is suitable for this project

• My proposal specifically checks TypeScript syntax, or it proposes a check that requires type information to be accurate.
• My proposal is not a "formatting rule"; meaning it does not just enforce how code is formatted (whitespace, brace placement, etc).
• I believe my proposal would be useful to the broader TypeScript community (meaning it is not a niche proposal).

Description

My rule would check that there are no unnecessary assignments of parameter properties in constructors.

Fail Cases

classFoo{constructor(publicbar:string){this.bar=bar;// <-- warn here}}classFoo2{baz:string;constructor(publicbar:string,baz:string){this.bar=bar;// <-- warn herethis.baz=baz;}}

Pass Cases

classFoo{constructor(publicbar:string){}}classFoo2{baz:string;constructor(publicbar:string,baz:string){this.baz=baz;}}

Additional Info

You can see inthis TypeScript playground that assignment of parameter properties produces duplicate assignment: