TypeScript's number type is a lie(bluepnume.medium.com)

4 pointsby bluepnumehá 2 meses6 comments

bluepnume.medium.com

https://bluepnume.medium.com/typescripts-number-type-is-a-lie-6b3b10dd8f54

6 comments

Supporting operator overloading is part of the linked TS issue [1]. But I'm more curious: why did operator overloading in ES6 itself [2] die?

[1] https://github.com/microsoft/TypeScript/issues/42218

[2] https://github.com/tc39/proposal-operator-overloading

bluepnumehá 2 meses

Probably if nothing else, impossible to have it perform well without static typing?

glkindlmannhá 2 meses

But traversing the prototype chain (to figure out method dispatch) is also potentially slow without static typing, and we're managing that ok, no?

bluepnumemês passado

True enough. Although personally I prefer to just use regular functions rather than big inheritance chains.

newaccountman2há 2 meses

Am I incorrect in thinking this is not a TypeScript problem, but a problem most languages have, and that TypeScript is one of the few with a neat little solution?

bluepnumehá 2 meses

In most languages you could probably solve this problem with a class. But wrapping all your numbers in a class with runtime consequences, just for a bit of extra type safety, feels quite extreme.