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Consistently use a Witness rather than an expression to represent a possibly-symbolic witness. (#2245)

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Previously we used an expression in some places and a `Witness` values in others. The eventual goal is to make `Witness` values behave like other symbolic values such as `NominalClassType`, but the first step is to consistently treat them like values rather than expressions.

No functionality change intended.
This commit is contained in:
Richard Smith
2022-10-03 14:00:41 -07:00
committed by GitHub
parent c198dafbe8
commit 04d49cebd8
11 changed files with 222 additions and 152 deletions
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explorer/interpreter/action_stack.h
+2 -2
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@@ -88,8 +88,8 @@ class ActionStack {
auto Spawn(std::unique_ptr<Action> child) -> ErrorOr<Success>;
auto Spawn(std::unique_ptr<Action> child, RuntimeScope scope)
-> ErrorOr<Success>;
// Replace the current action with another action of the same kind and run it
// next.
// Replace the current action with another action that produces the same kind
// of result and run it next.
auto ReplaceWith(std::unique_ptr<Action> child) -> ErrorOr<Success>;
// Start a new recursive action.