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feat: Implement frame-related asserted exprs and TraitDecreases #5542

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merged 10 commits into from
Jun 7, 2024
Merged

feat: Implement frame-related asserted exprs and TraitDecreases #5542

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b99dd4c
implement frame-related asserted exprs and TraitDecreases
alex-chew Jun 7, 2024
104f641
fix incorrect substitution for args to CheckFrameSubset
alex-chew Jun 7, 2024
b7ebc00
implement ReadFrameSubset asserted expr
alex-chew Jun 7, 2024
2d9b962
formatting
alex-chew Jun 7, 2024
0ecb0d2
Merge branch 'master' into alexchew/frame-podesc-exprs
alex-chew Jun 7, 2024
b1ebedd
cleanup
alex-chew Jun 7, 2024
8e44ac9
fix MakeDafnyMultiFrameCheck with empty subsetFrames
alex-chew Jun 7, 2024
cc06580
clarify substitution comments
alex-chew Jun 7, 2024
8d6b741
fix handling of FunctionCallExpr with non-method/function receiver
alex-chew Jun 7, 2024
433d80b
fix untyped ThisExpr
alex-chew Jun 7, 2024
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fix MakeDafnyMultiFrameCheck with empty subsetFrames
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@alex-chew
alex-chew committed Jun 7, 2024
commit 8e44ac9871ed5e4c1b31582da27e5950d118fcfa
3 changes: 3 additions & 0 deletions Source/DafnyCore/Verifier/ProofObligationDescription.cs
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Expand Up @@ -1890,6 +1890,9 @@ internal class Utils {
/// permit read/modification access to all objects, arrays, and/or sets of objects/arrays in the `subsetFrames`.
/// </summary>
public static Expression MakeDafnyMultiFrameCheck(List<FrameExpression> supersetFrames, List<FrameExpression> subsetFrames) {
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The detail required in methods like these make me very much want to share this code with the Boogie translation eventually (i.e., have the Boogie generator work by constructing this expression and then translating it). But that's a task for another day.

if (subsetFrames.Count == 0) {
return null;
}
return subsetFrames
.Select(target => MakeDafnyFrameCheck(supersetFrames, target.E, target.Field))
.Aggregate((e0, e1) => new BinaryExpr(Token.NoToken, BinaryExpr.Opcode.And, e0, e1));
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