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DeclinedThe issue was declined as something which matches the TypeScript visionThe issue was declined as something which matches the TypeScript visionSuggestionAn idea for TypeScriptAn idea for TypeScript
Description
Search Terms
"modify readonly for internal classes" - leads to "as any" hack (Goal is to create convinience)
"protected" search - can only be read by derived classes
Suggestion
I find myself looking to complex solutions or longer code to protect state. I'm hoping typescript can be used to reduce code and protect state away from runtime through a public readonly modifier that has write access for internal methods of a class.
Use Cases
I'm hoping to save runtime through typing state protection and avoid extra code such as getters and frameworks that use runtime to manage state.
Examples
class Dog {
readonlyPublic asleep = true
wake() {
// console.trace();
this.asleep = false; // will not throw an error as expected with "readonly"
}
}
const dogA = new Dog();
dogA.asleep = false // Error this is readonlyPublic (forcing us to use the dogA.wake() method to update state)
const isDogAsleep = dogA.asleep // but we can read it publicly without an error..
console.log(isDogAsleep) // => true
-------- update state
dogA.wake();
console.log(dogA.asleep) // => false;
Checklist
My suggestion meets these guidelines:
- This wouldn't be a breaking change in existing TypeScript/JavaScript code
- This wouldn't change the runtime behavior of existing JavaScript code
- This could be implemented without emitting different JS based on the types of the expressions
- This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
- This feature would agree with the rest of TypeScript's Design Goals.
IllusionMH
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DeclinedThe issue was declined as something which matches the TypeScript visionThe issue was declined as something which matches the TypeScript visionSuggestionAn idea for TypeScriptAn idea for TypeScript