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Fix exception in migration of ?? operator when the right hand side is a generic type
Change-Id: Ie372522f9493e2ccea8284f8583b0f43153adbbd Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/123884 Reviewed-by: Paul Berry <paulberry@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>
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@ -378,7 +378,9 @@ class EdgeBuilder extends GeneralizingAstVisitor<DecoratedType>
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rightType = rightOperand.accept(this);
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});
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var ifNullNode = NullabilityNode.forIfNotNull();
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expressionType = DecoratedType(node.staticType, ifNullNode);
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expressionType = _decorateUpperOrLowerBound(
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node, node.staticType, leftType, rightType, true,
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node: ifNullNode);
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_connect(
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rightType.node, expressionType.node, IfNullOrigin(source, node));
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} finally {
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@ -1201,6 +1201,15 @@ int f(int i, int j) => i ?? j;
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assertEdge(right, expression, guards: [left], hard: false);
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}
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test_binaryExpression_questionQuestion_genericReturnType() async {
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await analyze('''
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class C<E> {
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C<E> operator +(C<E> c) => this;
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}
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C<int> f(C<int> i, C<int> j) => i ?? j;
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''');
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}
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test_binaryExpression_right_dynamic() async {
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await analyze('''
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class C {
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