tree a4a1fa6274c9762721c1e1babedf94bd6aad8b84
parent 5e9df35a5794413202fbcaf0c41f6d4c5d2e7b81
author Paul Berry <paulberry@google.com> 1553092602 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1553092602 +0000

Rework tracking of variables in scope while summarizing expressions.

The new formulation allows easy popping of variables when leaving
nested scopes.  This should make it easier to support "for" collection
elements that declare variables.

Change-Id: Ib1a3f5085287573de99298eca772ce631837fc04
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97287
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>