BigInt support

[smikitky]

Steps

• Allow raw bigint values as input (new MultiRange([[555n, 999n]]))
• Add an option to parse strings as bigint

  new MultiRange('999999999999999999', { bigInt: true });
  // Should throw RangeError without bigInt option

• Update type definitions after TypeScript officially supports BigInt

We will not do automatic type conversions to/from plain numbers. You should use use either number or bigint exclusively within a single instance of MultiRange.

• TC39 BigInt proposal (now stage 3): https://github.com/tc39/proposal-bigint
• TypeScript issue: Support for TC39 "BigInt: Arbitrary precision integers in JavaScript" proposal microsoft/TypeScript#15096

[smikitky]

I will wait until TypeScript supports BigInt (planned in August 2018 according to the latest roadmap).

[1valdis]

Any updates on that?

[smikitky]

@1valdis Oh, thank you for the interest in this feature :) I started investigating this seriously, and found that there is no way to use Infinity as a literal type in TypeScript... For now, it's difficult to use unbounded ranges along with bigint. Is this limitation important to you?

[1valdis]

@smikitky I believe it'll be enough to have bounded ranges for now. How about making just a bounded version, and adding unbounded later (if even)? Throw if trying to use an unbounded initializer with bigint option?

Offtopic
Nice library you have there. I wonder why so few users. It's just ideally what I needed for my lazy rendering of audio frequency graph using Web Audio api. I believe there are much more use cases...

[smikitky]

@1valdis Thank you. It turned out that this is painful to implement without the literal Infinity type, so I created an issue in the TypeScript project. Let's see what happens...

[jkchuynh829]

@smikitky Any chance this still on the roadmap?

[smikitky]

@jkchuynh829 I'm still waitng for this issue to be resolved.