Revert "quick rewrite of semantic equality for sets"

This reverts commit 37749fd.

internal/fwschemadata/value_semantic_equality_set.go

@@ -128,10 +128,6 @@ func ValueSemanticEqualitySetElements(ctx context.Context, req ValueSemanticEqua
 	// Short circuit flag
 	updatedElements := false
 
-	// The underlying loop will mutate priorValueElements to avoid keeping
-	// duplicate semantically equal elements. Need the original length to avoid panicks
-	originalPriorElementsLength := len(priorValueElements)
-
 	// Loop through proposed elements by delegating to the recursive semantic
 	// equality logic. This ensures that recursion will catch a further
 	// underlying element type has its semantic equality logic checked, even if
@@ -140,44 +136,33 @@ func ValueSemanticEqualitySetElements(ctx context.Context, req ValueSemanticEqua
 		// Ensure new value always contains all of proposed new value
 		newValueElements[idx] = proposedNewValueElement
 
-		if idx >= originalPriorElementsLength {
+		if idx >= len(priorValueElements) {
 			continue
 		}
 
-		// Loop through all prior value elements and see if there are any semantically equal elements
-		for pIdx, priorValue := range priorValueElements {
-			elementReq := ValueSemanticEqualityRequest{
-				Path:             req.Path.AtSetValue(proposedNewValueElement),
-				PriorValue:       priorValue,
-				ProposedNewValue: proposedNewValueElement,
-			}
-			elementResp := &ValueSemanticEqualityResponse{
-				NewValue: elementReq.ProposedNewValue,
-			}
-
-			ValueSemanticEquality(ctx, elementReq, elementResp)
-
-			resp.Diagnostics.Append(elementResp.Diagnostics...)
-
-			if resp.Diagnostics.HasError() {
-				return
-			}
+		elementReq := ValueSemanticEqualityRequest{
+			Path:             req.Path.AtSetValue(proposedNewValueElement),
+			PriorValue:       priorValueElements[idx],
+			ProposedNewValue: proposedNewValueElement,
+		}
+		elementResp := &ValueSemanticEqualityResponse{
+			NewValue: elementReq.ProposedNewValue,
+		}
 
-			if elementResp.NewValue.Equal(elementReq.ProposedNewValue) {
-				// This prior value element didn't match, but there could be other elements that do
-				continue
-			}
+		ValueSemanticEquality(ctx, elementReq, elementResp)
 
-			// Prior state was kept, meaning that we found a semantically equal element
-			updatedElements = true
+		resp.Diagnostics.Append(elementResp.Diagnostics...)
 
-			// Remove the semantically equal element from the slice of candidates
-			priorValueElements = append(priorValueElements[:pIdx], priorValueElements[pIdx+1:]...)
+		if resp.Diagnostics.HasError() {
+			return
+		}
 
-			// Order doesn't matter, so we can just set the prior state element to this index
-			newValueElements[idx] = elementResp.NewValue
-			break
+		if elementResp.NewValue.Equal(elementReq.ProposedNewValue) {
+			continue
 		}
+
+		updatedElements = true
+		newValueElements[idx] = elementResp.NewValue
 	}
 
 	// No changes required if the elements were not updated.