Fix false positive confusing-naming error on generics with pointer type receiver

rule/confusing-naming.go

@@ -138,16 +138,32 @@ func getStructName(r *ast.FieldList) string {
 
 	switch v := t.(type) {
 	case *ast.StarExpr:
-		t = v.X
+		return extractFromStarExpr(v)
 	case *ast.IndexExpr:
-		t = v.X
+		return extractFromIndexExpr(v)
+	case *ast.Ident:
+		return v.Name
 	}
 
-	if p, _ := t.(*ast.Ident); p != nil {
-		result = p.Name
+	return defaultStructName
+}
+
+func extractFromStarExpr(expr *ast.StarExpr) string {
+	switch v := expr.X.(type) {
+	case *ast.IndexExpr:
+		return extractFromIndexExpr(v)
+	case *ast.Ident:
+		return v.Name
 	}
+	return defaultStructName
+}
 
-	return result
+func extractFromIndexExpr(expr *ast.IndexExpr) string {
+	switch v := expr.X.(type) {
+	case *ast.Ident:
+		return v.Name
+	}
+	return defaultStructName
 }
 
 func checkStructFields(fields *ast.FieldList, structName string, w *lintConfusingNames) {

testdata/confusing-naming1.go

@@ -70,3 +70,14 @@ type y[T any] struct{}
 
 func (y[T]) method() {
 }
+
+// issue #982
+type a[T any] struct{}
+
+func (x *a[T]) method() {
+}
+
+type b[T any] struct{}
+
+func (x *b[T]) method() {
+}