unnecessary_parenthesis: parenthesized pattern precedence (WIP)

lib/src/rules/unnecessary_parenthesis.dart

@@ -60,6 +60,7 @@ class UnnecessaryParenthesis extends LintRule {
       NodeLintRegistry registry, LinterContext context) {
     var visitor = _Visitor(this);
     registry.addParenthesizedExpression(this, visitor);
+    registry.addParenthesizedPattern(this, visitor);
   }
 }
 
@@ -84,6 +85,15 @@ class _Visitor extends SimpleAstVisitor<void> {
 
   _Visitor(this.rule);
 
+  @override
+  void visitParenthesizedPattern(ParenthesizedPattern node) {
+    //https://github.com/dart-lang/linter/issues/4062
+    var parent = node.parent;
+    if (parent is DartPattern && parent.precedence < node.pattern.precedence) {
+      rule.reportLint(node);
+    }
+  }
+
   @override
   void visitParenthesizedExpression(ParenthesizedExpression node) {
     var parent = node.parent;

test/rules/unnecessary_parenthesis_test.dart

@@ -34,6 +34,31 @@ void f(int i) {
 }
 ''');
   }
+
+  ///https://github.com/dart-lang/linter/issues/4062
+  //@FailingTest(issue: 'https://github.com/dart-lang/sdk/issues/51426')
+  @soloTest
+  test_parenthesized_listPattern() async {
+    await assertDiagnostics(r'''
+void f(List<int> l) {
+  if (l case [(<3), 12]) return;
+}
+''', [
+      lint(41, 11),
+    ]);
+  }
+
+  @soloTest
+  test_parenthesized_relationalPattern() async {
+    await assertDiagnostics(r'''
+void f(List<int> l) {
+  if (l case [(<3) || (>5)]) return;
+}
+''', [
+      lint(36, 4),
+      lint(44, 4),
+    ]);
+  }
 }
 
 @reflectiveTest