Plumbing for local items support

[matklad]

bors r+

[bors]

Build succeeded

• Rust
• TypeScript

[ice1000]

🎉🤖🚀❤️💟😍

[ice1000]

What's the next step of supporting local imports?

[flodiebold]

How do you intend to handle something like

fn foo() {
    {
        fn bar() {}
    }
}

? Should the container just be the function here, even though it's actually a nested scope?

[matklad]

@ice1000 local imports will be supported last, as they are the most complex bit.

@flodiebold don't know yet! My current plan is to treat every item as if declared in the outermost block, which will cover 80% of use-cases I hope!

I think though we do want to anchor every item at the def, for identification purposes. That is, the name resolution scopes don't have to correspond 1-to-1 to how we store things internally.