Re-add Option and Result.

[adlerjohn]

Reverts #63, now that FuelLabs/sway#815 is in.

[nfurfaro]

@adlerjohn Are there any blockers for this, or can we wrap it up and merge soonish?

[adlerjohn]

We have to wait for v0.7.0 of forc, which can be cut after the above PR is merged.

[nfurfaro]

Ah, I see, I took "now that FuelLabs/sway#815 is in." to mean 815 was done.

[nfurfaro]

@adlerjohn can we move ahead on this with the release of Forc v0.7.0 ?

[nfurfaro]

Looks good, but we should ensure this is tested before merging.
Can I push some tests to your branch here @adlerjohn ?

[otrho]

It's a tiny bit strange that is_none() and is_err() are matching against Some and Ok and returning false, instead of matching None and Err, but this works.

[adlerjohn]

It isn't possible to instantiate a Result, so impossible to test. Still waiting on FuelLabs/sway#814 after all!

[adlerjohn]

These tests still need to be implemented:

sway-lib-std/tests/test_projects/result/src/main.sw

Lines 11 to 25 in 3be26db

	fn test_ok() {
	// let r = Result::<u64, ()>::Ok(42u64);
	// if ( !result_is_ok(r) || result_is_err(r)) {
	// panic(0);
	// }
	}
	fn test_err() {
	// let r = Result::<(), ()>::Err(());
	// if (result_is_ok(r) || !result_is_err(r)) {
	// panic(0);
	// }
	}

[otrho]

So Emily's recent changes fixed the problems with instantiation?

[adlerjohn]

So Emily's recent changes fixed the problems with instantiation?

[nfurfaro]

LG