Cannot access protected field but private field inside nested class

🔎 Search Terms

private, protected

🕗 Version & Regression Information

Version 5.6.2

⏯ Playground Link

https://www.typescriptlang.org/play/?#code/KYDwDg9gTgLgBAYwDYEMDOa4DEITgbwChC5S4woIZgFqATOGACwEs0BJNABUutuAYBeOAEYA3CTIUWANxTVGrDtyiz5wOMPHEycAEYooACgCUALhx4iu3QggA7NPGbzNithJtlJXqMBgArlD2cPbAAO6IqBhwoNT2dJiWBDpeNmgQALb+rPYA5qYpacVwfoHBivIAdMxsnDxqCgDUlTA1SvW8NPSeJaQAvj42g7qD-UA

💻 Code

export class Foo {

    protected thisIsProtected = 1;
    private thisIsPrivate = 1;

    bar():Foo {
        const that = this;
        
        return new class extends Foo {

            something() {
                return that.thisIsPrivate + that.thisIsProtected;
            }
        }
    }
}

🙁 Actual behavior

I get a compile error for that.thisIsProtected, but not for that.thisIsPrivate

🙂 Expected behavior

I can access the protected field, like the private

Additional information about the issue

No response

Inizia dalla riproduzione collegata in TypeScript Playground e confronta il modo in cui il checker gestisce l'accesso a protected e private attraverso la classe anonima annidata. Traccia il controllo degli accessi per that.thisIsProtected rispetto a that.thisIsPrivate, quindi verifica che l'accesso protected si comporti come previsto senza introdurre regressioni nel caso private.