From e83987562dbbe78676cf5a1407a8835ad67dedc4 Mon Sep 17 00:00:00 2001
From: vladimir-beloded <x-volodymyr.beloded@transcarent.com>
Date: Fri, 10 Nov 2023 15:32:28 +0200
Subject: [PATCH] Take into account the constructor initializer in the
 avoid_unused_parameters rule

---
 .../avoid_unused_parameters_visitor.dart               |  7 +++++--
 lint_test/avoid_unused_parameters_test.dart            | 10 ++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/lints/avoid_unused_parameters/avoid_unused_parameters_visitor.dart b/lib/lints/avoid_unused_parameters/avoid_unused_parameters_visitor.dart
index 21760e13..7283cad2 100644
--- a/lib/lints/avoid_unused_parameters/avoid_unused_parameters_visitor.dart
+++ b/lib/lints/avoid_unused_parameters/avoid_unused_parameters_visitor.dart
@@ -53,6 +53,7 @@ class AvoidUnusedParametersVisitor extends RecursiveAstVisitor<void> {
       _getUnusedParameters(
         node.body,
         parameters.parameters,
+        initializers: node.initializers,
       ).whereNot(nameConsistsOfUnderscoresOnly),
     );
   }
@@ -104,11 +105,13 @@ class AvoidUnusedParametersVisitor extends RecursiveAstVisitor<void> {
 
   Set<FormalParameter> _getUnusedParameters(
     AstNode body,
-    Iterable<FormalParameter> parameters,
-  ) {
+    Iterable<FormalParameter> parameters, {
+    NodeList<AstNode>? initializers,
+  }) {
     final result = <FormalParameter>{};
     final visitor = _IdentifiersVisitor();
     body.visitChildren(visitor);
+    initializers?.accept(visitor);
 
     final allIdentifierElements = visitor.elements;
 
diff --git a/lint_test/avoid_unused_parameters_test.dart b/lint_test/avoid_unused_parameters_test.dart
index e54d6499..4d3950f1 100644
--- a/lint_test/avoid_unused_parameters_test.dart
+++ b/lint_test/avoid_unused_parameters_test.dart
@@ -109,3 +109,13 @@ class TestWidget extends StatelessWidget {
     return const Placeholder();
   }
 }
+
+class UsingConstructorParameterInInitializer {
+  final int _value;
+
+  UsingConstructorParameterInInitializer(int value) : _value = value;
+
+  void printValue() {
+    print(_value);
+  }
+}