Joe Savona 011570a078 [rust][sema] Bubble unresolved references (for hoisting) ...

This is a precursor to adding support for hoisting in semantic analysis. 
Previously when we encountered an unknown reference we immediately reported an 
error. But hoisted variables may be referenced before they're defined, so we 
don't know for sure when we see an unknown variable if its actually unbound or 
not. 

This PR adds the first part of hoistingn support: rather than immediately report 
an error when encountering an unbound variable we store it in a list of 
unresolved references on the current scope. As we close each scope we recheck 
and see if the variable can now be resolved. If yes we record that, otherwise we 
bubble up the unresolved reference to the parent scope (and try again there). 

The next PR(s) will handle hoisting of `var` and other syntax to the apropriate 
nearest scope boundary (function/module).

2023-08-14 10:08:02 -07:00

compiler

[rust][sema] Bubble unresolved references (for hoisting)

2023-08-14 10:08:02 -07:00

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