Inferred implicit any accessor type in object literal

TypeScript Version:

nightly (1.9.0-dev.20160429)

Code

const foo = {
    _foo: 'bar',
    get foo() { // <- 'foo' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
        return this._foo;
    },
    set foo(value) { // <- 'value' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer.
        this._foo = value;
    }
};

Expected behavior:

No errors.

Actual behavior:

With the compiler option noImplicitAny = true and inferred object literal typing, the compiler is complaining that get and set accessors have inferred any types, when though it is logical that the type of string can be inferred from the context (or at least I am missing the reason why it cannot be inferred).

It doesn't repro for me on master. I thought the nightly from 04/29 would have the commits to revert object literal this typing to always be any, but maybe it doesn't. Let me figure out which commit 1.9.0-dev.20160429 is built from.

It does have errors all over the place with --noImplicitThis. Could that be what you're using?

I found it... --strictNullChecks on for 1.9.0-dev.20160429 it will not cause the behaviour. If you turn --strictNullChecks off on 1.9.0-dev.20160429 it will manifest itself, but isn't present at all (either configuration) on 1.9.0-dev.20160503. Not sure what broke/fixed it... 😄

I didn't have time to check the commit that the 20160429 nightly used, but it's probably the change I made that reverts this in object literals to any. I guess it went in too late to get picked up by the nightly build.

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Inferred implicit any accessor type in object literal #8373

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Inferred implicit any accessor type in object literal #8373

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sandersn commented on May 3, 2016

kitsonk commented on May 3, 2016

sandersn commented on May 3, 2016

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