fix: mark all std::boxed::Box returns with #[allow(clippy::unnecessary_box_returns)], and updated tests

Author: kristof-mattei

crates/cxx-qt-gen/src/generator/rust/constructor.rs

@@ -406,6 +406,7 @@ pub fn generate(
             #[doc(hidden)]
             #[allow(unused_variables)]
             #[allow(clippy::extra_unused_lifetimes)]
+            #[allow(clippy::unnecessary_box_returns)]
             // If we use the lifetime here for casting to the specific Constructor type, then
             // clippy for some reason thinks that the lifetime is unused even though it is used
             // by the `as` expression.
@@ -492,6 +493,7 @@ mod tests {
             &blocks.cxx_qt_mod_contents[0],
             quote! {
                 #[doc(hidden)]
+                #[allow(clippy::unnecessary_box_returns)]
                 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust>
                 {
                     std::boxed::Box::new(core::default::Default::default())
@@ -600,6 +602,7 @@ mod tests {
                 #[doc(hidden)]
                 #[allow(unused_variables)]
                 #[allow(clippy::extra_unused_lifetimes)]
+                #[allow(clippy::unnecessary_box_returns)]
                 pub fn new_rs_MyObject_0(new_arguments: qobject::CxxQtConstructorNewArgumentsMyObject0) -> std::boxed::Box<MyObjectRust> {
                     std::boxed::Box::new(
                         <qobject::MyObject as cxx_qt::Constructor<()> >::new(())
@@ -733,6 +736,7 @@ mod tests {
                 #[doc(hidden)]
                 #[allow(unused_variables)]
                 #[allow(clippy::extra_unused_lifetimes)]
+                #[allow(clippy::unnecessary_box_returns)]
                 pub fn new_rs_MyObject_1(new_arguments: qobject::CxxQtConstructorNewArgumentsMyObject1) -> std::boxed::Box<MyObjectRust> {
                     std::boxed::Box::new(
                         <qobject::MyObject as cxx_qt::Constructor<(*const QObject,)> >::new(

crates/cxx-qt-gen/test_outputs/inheritance.rs

@@ -84,6 +84,7 @@ impl cxx_qt::Upcast<inheritance::QAbstractItemModel> for inheritance::MyObject {
 #[allow(dead_code)]
 use inheritance::QAbstractItemModel as _;
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }

crates/cxx-qt-gen/test_outputs/invokables.rs

@@ -324,6 +324,7 @@ pub fn route_arguments_MyObject_0<'a>(
 #[doc(hidden)]
 #[allow(unused_variables)]
 #[allow(clippy::extra_unused_lifetimes)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn new_rs_MyObject_0<'a>(
     new_arguments: ffi::CxxQtConstructorNewArgumentsMyObject0<'a>,
 ) -> std::boxed::Box<MyObjectRust> {
@@ -356,6 +357,7 @@ pub fn route_arguments_MyObject_1() -> ffi::CxxQtConstructorArgumentsMyObject1 {
 #[doc(hidden)]
 #[allow(unused_variables)]
 #[allow(clippy::extra_unused_lifetimes)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn new_rs_MyObject_1(
     new_arguments: ffi::CxxQtConstructorNewArgumentsMyObject1,
 ) -> std::boxed::Box<MyObjectRust> {

crates/cxx-qt-gen/test_outputs/passthrough_and_naming.rs

@@ -591,6 +591,7 @@ cxx_qt::static_assertions::assert_eq_size!(
     [usize; 2]
 );
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }
@@ -756,6 +757,7 @@ cxx_qt::static_assertions::assert_eq_size!(
     [usize; 2]
 );
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_SecondObjectRust() -> std::boxed::Box<SecondObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }
@@ -775,6 +777,7 @@ impl ::cxx_qt::CxxQtType for ffi::SecondObject {
     }
 }
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_ThirdObjectRust() -> std::boxed::Box<ThirdObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }

crates/cxx-qt-gen/test_outputs/properties.rs

@@ -1038,6 +1038,7 @@ cxx_qt::static_assertions::assert_eq_size!(
     [usize; 2]
 );
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }

crates/cxx-qt-gen/test_outputs/qenum.rs

@@ -145,6 +145,7 @@ mod ffi {
     }
 }
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }
@@ -164,6 +165,7 @@ impl ::cxx_qt::CxxQtType for ffi::MyObject {
     }
 }
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_InternalObject() -> std::boxed::Box<InternalObject> {
     std::boxed::Box::new(core::default::Default::default())
 }

crates/cxx-qt-gen/test_outputs/signals.rs

@@ -429,6 +429,7 @@ cxx_qt::static_assertions::assert_eq_size!(
     [usize; 2]
 );
 #[doc(hidden)]
+#[allow(clippy::unnecessary_box_returns)]
 pub fn create_rs_MyObjectRust() -> std::boxed::Box<MyObjectRust> {
     std::boxed::Box::new(core::default::Default::default())
 }