Doug Gregor 836bc57fe5 [AST Walker] Stop visiting the bodies of closures as expressions. ...

Single-expression closures have always been traversed differently
from multi-statement closures. The former were traversed as if the
expression was their only child, skipping the BraceStmt and implicit
return, while the later was traversed as a normal BraceStmt.
Unify on the latter treatment, so that traversal

There are a few places where we unintentionally relied on this
expression-as-child behavior. Clean those up to work with arbitrary
closures, which is an overall simplification in the logic.

2020-06-04 23:06:32 -07:00

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