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Issue 52136. Report USE_OF_VOID_RESULT for SwitchExpression.
Bug: https://github.com/dart-lang/sdk/issues/52136 Change-Id: I3a3b8f45419c57deec77deae37cd5f98481debeb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/298400 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
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@ -1252,6 +1252,18 @@ class ErrorVerifier extends RecursiveAstVisitor<void>
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});
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}
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@override
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void visitSwitchExpression(SwitchExpression node) {
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checkForUseOfVoidResult(node.expression);
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super.visitSwitchExpression(node);
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}
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@override
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void visitSwitchExpressionCase(SwitchExpressionCase node) {
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checkForUseOfVoidResult(node.expression);
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super.visitSwitchExpressionCase(node);
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}
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@override
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void visitSwitchPatternCase(SwitchPatternCase node) {
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_withHiddenElements(node.statements, () {
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@ -213,6 +213,40 @@ void main() {
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]);
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}
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test_switchExpression_expression() async {
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await assertErrorsInCode('''
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void f(void x) {
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(switch(x) {
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_ => 0,
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});
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}
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''', [
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error(CompileTimeErrorCode.USE_OF_VOID_RESULT, 27, 1),
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]);
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}
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test_switchExpressionCase_expression() async {
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await assertErrorsInCode('''
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void f(Object? x) {
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(switch(x) {
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_ => print(x),
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});
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}
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''', [
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error(CompileTimeErrorCode.USE_OF_VOID_RESULT, 44, 5),
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]);
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}
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test_switchStatement_expression() async {
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await assertErrorsInCode('''
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void f(void x) {
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switch(x) {}
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}
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''', [
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error(CompileTimeErrorCode.USE_OF_VOID_RESULT, 26, 1),
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]);
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}
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test_throwVoidValueError() async {
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await assertErrorsInCode('''
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void f(void x) {
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@ -527,16 +561,6 @@ void main() {
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]);
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}
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test_useOfVoidInSwitchExpressionError() async {
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await assertErrorsInCode('''
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void f(void x) {
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switch(x) {}
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}
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''', [
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error(CompileTimeErrorCode.USE_OF_VOID_RESULT, 26, 1),
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]);
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}
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test_useOfVoidInWhileConditionError() async {
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await assertErrorsInCode('''
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void main() {
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