Avoid windows crate dependency in implement and interface macros (

#2917)

.github/workflows/clippy.yml

@@ -107,6 +107,7 @@ jobs:
           cargo clippy -p test_helpers &&
           cargo clippy -p test_implement &&
           cargo clippy -p test_interface &&
+          cargo clippy -p test_interface_core &&
           cargo clippy -p test_interop &&
           cargo clippy -p test_lib &&
           cargo clippy -p test_literals &&

.github/workflows/test.yml

@@ -107,14 +107,15 @@ jobs:
           cargo test -p test_dispatch &&
           cargo test -p test_does_not_return &&
           cargo test -p test_enums &&
-          cargo clean &&
           cargo test -p test_error &&
+          cargo clean &&
           cargo test -p test_event &&
           cargo test -p test_extensions &&
           cargo test -p test_handles &&
           cargo test -p test_helpers &&
           cargo test -p test_implement &&
           cargo test -p test_interface &&
+          cargo test -p test_interface_core &&
           cargo test -p test_interop &&
           cargo test -p test_lib &&
           cargo test -p test_literals &&

crates/libs/bindgen/src/rust/extensions/impl/Foundation/Collections/Iterable.rs

@@ -1,4 +1,4 @@
-#[::windows_implement::implement(IIterable<T>)]
+#[windows_core::implement(IIterable<T>)]
 struct StockIterable<T>
 where
     T: windows_core::RuntimeType + 'static,
@@ -25,7 +25,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<T>)]
+#[windows_core::implement(IIterator<T>)]
 struct StockIterator<T>
 where
     T: windows_core::RuntimeType + 'static,

crates/libs/bindgen/src/rust/extensions/impl/Foundation/Collections/MapView.rs

@@ -1,4 +1,4 @@
-#[::windows_implement::implement(IMapView<K, V>, IIterable<IKeyValuePair<K, V>>)]
+#[windows_core::implement(IMapView<K, V>, IIterable<IKeyValuePair<K, V>>)]
 struct StockMapView<K, V>
 where
     K: windows_core::RuntimeType + 'static,
@@ -60,7 +60,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<IKeyValuePair<K, V>>)]
+#[windows_core::implement(IIterator<IKeyValuePair<K, V>>)]
 struct StockMapViewIterator<'a, K, V>
 where
     K: windows_core::RuntimeType + 'static,
@@ -129,7 +129,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IKeyValuePair<K, V>)]
+#[windows_core::implement(IKeyValuePair<K, V>)]
 struct StockKeyValuePair<K, V>
 where
     K: windows_core::RuntimeType + 'static,

crates/libs/bindgen/src/rust/extensions/impl/Foundation/Collections/VectorView.rs

@@ -1,4 +1,4 @@
-#[::windows_implement::implement(IVectorView<T>, IIterable<T>)]
+#[windows_core::implement(IVectorView<T>, IIterable<T>)]
 struct StockVectorView<T>
 where
     T: windows_core::RuntimeType + 'static,
@@ -61,7 +61,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<T>)]
+#[windows_core::implement(IIterator<T>)]
 struct StockVectorViewIterator<T>
 where
     T: windows_core::RuntimeType + 'static,

crates/libs/core/Cargo.toml

@@ -25,6 +25,6 @@ path = "../targets"
 version = "0.1.0"
 path = "../result"
 
-[features]
-default = []
-implement = []
+[dependencies]
+windows-implement = { path = "../implement",  version = "0.53.0" }
+windows-interface = { path = "../interface",  version = "0.53.0" }

crates/libs/core/src/inspectable.rs

@@ -50,7 +50,6 @@ impl RuntimeType for IInspectable {
 
 impl RuntimeName for IInspectable {}
 
-#[cfg(feature = "implement")]
 impl IInspectable_Vtbl {
     pub const fn new<Identity: IUnknownImpl, Name: RuntimeName, const OFFSET: isize>() -> Self {
         unsafe extern "system" fn GetIids(_: *mut std::ffi::c_void, count: *mut u32, values: *mut *mut GUID) -> HRESULT {

crates/libs/core/src/lib.rs

@@ -44,6 +44,8 @@ pub use strings::*;
 pub use unknown::*;
 pub use variant::*;
 pub use weak::*;
+pub use windows_implement::implement;
+pub use windows_interface::interface;
 pub use windows_result::*;
 
 /// Attempts to load the factory object for the given WinRT class.

crates/libs/core/src/unknown.rs

@@ -85,7 +85,6 @@ pub trait IUnknownImpl {
     unsafe fn GetTrustLevel(&self, value: *mut i32) -> HRESULT;
 }
 
-#[cfg(feature = "implement")]
 impl IUnknown_Vtbl {
     pub const fn new<T: IUnknownImpl, const OFFSET: isize>() -> Self {
         unsafe extern "system" fn QueryInterface<T: IUnknownImpl, const OFFSET: isize>(this: *mut std::ffi::c_void, iid: *const GUID, interface: *mut *mut std::ffi::c_void) -> HRESULT {

crates/libs/implement/Cargo.toml

@@ -3,7 +3,7 @@ name = "windows-implement"
 version = "0.53.0"
 authors = ["Microsoft"]
 edition = "2021"
-rust-version = "1.64"
+rust-version = "1.62"
 license = "MIT OR Apache-2.0"
 description = "The implement macro for the windows crate"
 repository = "https://github.com/microsoft/windows-rs"

crates/libs/implement/src/lib.rs

@@ -40,7 +40,7 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
     let identity_type = if let Some(first) = attributes.implement.first() {
         first.to_ident()
     } else {
-        quote! { ::windows::core::IInspectable }
+        quote! { ::windows_core::IInspectable }
     };
 
     let original_type2 = original_type.clone();
@@ -97,11 +97,11 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
                     unsafe { ::core::mem::transmute(vtable_ptr) }
                 }
             }
-            impl #generics ::windows::core::AsImpl<#original_ident::#generics> for #interface_ident where #constraints {
+            impl #generics ::windows_core::AsImpl<#original_ident::#generics> for #interface_ident where #constraints {
                 // SAFETY: the offset is guranteed to be in bounds, and the implementation struct
                 // is guaranteed to live at least as long as `self`.
                 unsafe fn as_impl(&self) -> &#original_ident::#generics {
-                    let this = ::windows::core::Interface::as_raw(self);
+                    let this = ::windows_core::Interface::as_raw(self);
                     // Subtract away the vtable offset plus 1, for the `identity` field, to get
                     // to the impl struct which contains that original implementation type.
                     let this = (this as *mut *mut ::core::ffi::c_void).sub(1 + #offset) as *mut #impl_ident::#generics;
@@ -114,54 +114,54 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
     let tokens = quote! {
         #[repr(C)]
         struct #impl_ident #generics where #constraints {
-            identity: *const ::windows::core::IInspectable_Vtbl,
+            identity: *const ::windows_core::IInspectable_Vtbl,
             vtables: (#(*const #vtbl_idents,)*),
              this: #original_ident::#generics,
-            count: ::windows::core::imp::WeakRefCount,
+            count: ::windows_core::imp::WeakRefCount,
         }
         impl #generics #impl_ident::#generics where #constraints {
             const VTABLES: (#(#vtbl_idents2,)*) = (#(#vtable_news,)*);
-            const IDENTITY: ::windows::core::IInspectable_Vtbl = ::windows::core::IInspectable_Vtbl::new::<Self, #identity_type, 0>();
+            const IDENTITY: ::windows_core::IInspectable_Vtbl = ::windows_core::IInspectable_Vtbl::new::<Self, #identity_type, 0>();
             fn new(this: #original_ident::#generics) -> Self {
                 Self {
                     identity: &Self::IDENTITY,
                     vtables:(#(&Self::VTABLES.#offset,)*),
                     this,
-                    count: ::windows::core::imp::WeakRefCount::new(),
+                    count: ::windows_core::imp::WeakRefCount::new(),
                 }
             }
         }
-         impl #generics ::windows::core::IUnknownImpl for #impl_ident::#generics where #constraints {
+         impl #generics ::windows_core::IUnknownImpl for #impl_ident::#generics where #constraints {
             type Impl = #original_ident::#generics;
             fn get_impl(&self) -> &Self::Impl {
                 &self.this
             }
-            unsafe fn QueryInterface(&self, iid: *const ::windows::core::GUID, interface: *mut *mut ::core::ffi::c_void) -> ::windows::core::HRESULT {
+            unsafe fn QueryInterface(&self, iid: *const ::windows_core::GUID, interface: *mut *mut ::core::ffi::c_void) -> ::windows_core::HRESULT {
                 if iid.is_null() || interface.is_null() {
-                    return ::windows::core::HRESULT(-2147467261); // E_POINTER
+                    return ::windows_core::HRESULT(-2147467261); // E_POINTER
                 }
 
                 let iid = &*iid;
 
-                *interface = if iid == &<::windows::core::IUnknown as ::windows::core::Interface>::IID
-                    || iid == &<::windows::core::IInspectable as ::windows::core::Interface>::IID
-                    || iid == &<::windows::core::imp::IAgileObject as ::windows::core::Interface>::IID {
+                *interface = if iid == &<::windows_core::IUnknown as ::windows_core::Interface>::IID
+                    || iid == &<::windows_core::IInspectable as ::windows_core::Interface>::IID
+                    || iid == &<::windows_core::imp::IAgileObject as ::windows_core::Interface>::IID {
                         &self.identity as *const _ as *mut _
                 } #(#queries)* else {
                     ::core::ptr::null_mut()
                 };
 
                 if !(*interface).is_null() {
                     self.count.add_ref();
-                    return ::windows::core::HRESULT(0);
+                    return ::windows_core::HRESULT(0);
                 }
 
                 *interface = self.count.query(iid, &self.identity as *const _ as *mut _);
 
                 if (*interface).is_null() {
-                    ::windows::core::HRESULT(-2147467262) // E_NOINTERFACE
+                    ::windows_core::HRESULT(-2147467262) // E_NOINTERFACE
                 } else {
-                    ::windows::core::HRESULT(0)
+                    ::windows_core::HRESULT(0)
                 }
             }
             fn AddRef(&self) -> u32 {
@@ -174,12 +174,12 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
                 }
                 remaining
             }
-            unsafe fn GetTrustLevel(&self, value: *mut i32) -> ::windows::core::HRESULT {
+            unsafe fn GetTrustLevel(&self, value: *mut i32) -> ::windows_core::HRESULT {
                 if value.is_null() {
-                    return ::windows::core::HRESULT(-2147467261); // E_POINTER
+                    return ::windows_core::HRESULT(-2147467261); // E_POINTER
                 }
                 *value = #trust_level;
-                ::windows::core::HRESULT(0)
+                ::windows_core::HRESULT(0)
             }
          }
         impl #generics #original_ident::#generics where #constraints {
@@ -189,14 +189,14 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
             ///
             /// This function can only be safely called if `self` has been heap allocated and pinned using
             /// the mechanisms provided by `implement` macro.
-            unsafe fn cast<I: ::windows::core::Interface>(&self) -> ::windows::core::Result<I> {
+            unsafe fn cast<I: ::windows_core::Interface>(&self) -> ::windows_core::Result<I> {
                 let boxed = (self as *const _ as *const *mut ::core::ffi::c_void).sub(1 + #interfaces_len) as *mut #impl_ident::#generics;
                 let mut result = ::std::ptr::null_mut();
-                _ = <#impl_ident::#generics as ::windows::core::IUnknownImpl>::QueryInterface(&*boxed, &I::IID, &mut result);
-                ::windows::core::Type::from_abi(result)
+                _ = <#impl_ident::#generics as ::windows_core::IUnknownImpl>::QueryInterface(&*boxed, &I::IID, &mut result);
+                ::windows_core::Type::from_abi(result)
             }
         }
-        impl #generics ::core::convert::From<#original_ident::#generics> for ::windows::core::IUnknown where #constraints {
+        impl #generics ::core::convert::From<#original_ident::#generics> for ::windows_core::IUnknown where #constraints {
             fn from(this: #original_ident::#generics) -> Self {
                 let this = #impl_ident::#generics::new(this);
                 let boxed = ::core::mem::ManuallyDrop::new(::std::boxed::Box::new(this));
@@ -205,7 +205,7 @@ pub fn implement(attributes: proc_macro::TokenStream, original_type: proc_macro:
                 }
             }
         }
-        impl #generics ::core::convert::From<#original_ident::#generics> for ::windows::core::IInspectable where #constraints {
+        impl #generics ::core::convert::From<#original_ident::#generics> for ::windows_core::IInspectable where #constraints {
             fn from(this: #original_ident::#generics) -> Self {
                 let this = #impl_ident::#generics::new(this);
                 let boxed = ::core::mem::ManuallyDrop::new(::std::boxed::Box::new(this));
@@ -237,7 +237,7 @@ impl ImplementType {
     fn to_vtbl_ident(&self) -> proc_macro2::TokenStream {
         let ident = self.to_ident();
         quote! {
-            <#ident as ::windows::core::Interface>::Vtable
+            <#ident as ::windows_core::Interface>::Vtable
         }
     }
 }

crates/libs/interface/Cargo.toml

@@ -3,7 +3,7 @@ name = "windows-interface"
 version = "0.53.0"
 authors = ["Microsoft"]
 edition = "2021"
-rust-version = "1.64"
+rust-version = "1.62"
 license = "MIT OR Apache-2.0"
 description = "The interface macro for the windows crate"
 repository = "https://github.com/microsoft/windows-rs"

crates/libs/interface/src/lib.rs

@@ -98,11 +98,11 @@ impl Interface {
             #(#docs)*
             #vis struct #name(#parent);
             #implementation
-            unsafe impl ::windows::core::Interface for #name {
+            unsafe impl ::windows_core::Interface for #name {
                 type Vtable = #vtable_name;
-                const IID: ::windows::core::GUID = #guid;
+                const IID: ::windows_core::GUID = #guid;
             }
-            impl ::windows::core::RuntimeName for #name {}
+            impl ::windows_core::RuntimeName for #name {}
 
             #com_trait
             #vtable
@@ -132,7 +132,7 @@ impl Interface {
                 let ret = &m.ret;
                 quote! {
                     #vis unsafe fn #name(&self, #(#args),*) #ret {
-                        (::windows::core::Interface::vtable(self).#name)(::windows::core::Interface::as_raw(self), #(#params),*)
+                        (::windows_core::Interface::vtable(self).#name)(::windows_core::Interface::as_raw(self), #(#params),*)
                     }
                 }
             })
@@ -211,7 +211,7 @@ impl Interface {
                 let ret = &m.ret;
                 if parent_vtable.is_some() {
                     quote! {
-                        unsafe extern "system" fn #name<Identity: ::windows::core::IUnknownImpl<Impl = Impl>, Impl: #trait_name, const OFFSET: isize>(this: *mut ::core::ffi::c_void, #(#args),*) #ret {
+                        unsafe extern "system" fn #name<Identity: ::windows_core::IUnknownImpl<Impl = Impl>, Impl: #trait_name, const OFFSET: isize>(this: *mut ::core::ffi::c_void, #(#args),*) #ret {
                             let this = (this as *const *const ()).offset(OFFSET) as *const Identity;
                             let this = (*this).get_impl();
                             this.#name(#(#params),*).into()
@@ -220,7 +220,7 @@ impl Interface {
                 } else {
                     quote! {
                         unsafe extern "system" fn #name<Impl: #trait_name>(this: *mut ::core::ffi::c_void, #(#args),*) #ret {
-                            let this = (this as *mut *mut ::core::ffi::c_void) as *const ::windows::core::ScopedHeap;
+                            let this = (this as *mut *mut ::core::ffi::c_void) as *const ::windows_core::ScopedHeap;
                             let this = (*this).this as *const Impl;
                             (*this).#name(#(#params),*).into()
                         }
@@ -255,13 +255,13 @@ impl Interface {
                     #(#vtable_entries)*
                 }
                 impl #vtable_name {
-                    pub const fn new<Identity: ::windows::core::IUnknownImpl<Impl = Impl>, Impl: #trait_name, const OFFSET: isize>() -> Self {
+                    pub const fn new<Identity: ::windows_core::IUnknownImpl<Impl = Impl>, Impl: #trait_name, const OFFSET: isize>() -> Self {
                         #(#functions)*
                         Self { base__: #parent_vtable::new::<#parent_vtable_generics>(), #(#entries),* }
                     }
 
-                    pub fn matches(iid: &windows::core::GUID) -> bool {
-                        iid == &<#name as ::windows::core::Interface>::IID
+                    pub fn matches(iid: &windows_core::GUID) -> bool {
+                        iid == &<#name as ::windows_core::Interface>::IID
                     }
                 }
             }
@@ -283,10 +283,10 @@ impl Interface {
                     const VTABLE: #vtable_name = #vtable_name::new::<T>();
                 }
                 impl #name {
-                    fn new<'a, T: #trait_name>(this: &'a T) -> ::windows::core::ScopedInterface<'a, #name> {
-                        let this = ::windows::core::ScopedHeap { vtable: &#implvtbl_name::<T>::VTABLE as *const _ as *const _, this: this as *const _ as *const _ };
+                    fn new<'a, T: #trait_name>(this: &'a T) -> ::windows_core::ScopedInterface<'a, #name> {
+                        let this = ::windows_core::ScopedHeap { vtable: &#implvtbl_name::<T>::VTABLE as *const _ as *const _, this: this as *const _ as *const _ };
                         let this = ::std::mem::ManuallyDrop::new(::std::boxed::Box::new(this));
-                        unsafe { ::windows::core::ScopedInterface::new(::std::mem::transmute(&this.vtable)) }
+                        unsafe { ::windows_core::ScopedInterface::new(::std::mem::transmute(&this.vtable)) }
                     }
                 }
             }
@@ -298,12 +298,12 @@ impl Interface {
         let name = &self.name;
         let name_string = format!("{name}");
         quote! {
-            impl ::core::convert::From<#name> for ::windows::core::IUnknown {
+            impl ::core::convert::From<#name> for ::windows_core::IUnknown {
                 fn from(value: #name) -> Self {
                     unsafe { ::core::mem::transmute(value) }
                 }
             }
-            impl ::core::convert::From<&#name> for ::windows::core::IUnknown {
+            impl ::core::convert::From<&#name> for ::windows_core::IUnknown {
                 fn from(value: &#name) -> Self {
                     ::core::convert::From::from(::core::clone::Clone::clone(value))
                 }
@@ -460,7 +460,7 @@ impl Guid {
             let data4_7 = hex_lit(data4_7);
             let data4_8 = hex_lit(data4_8);
             Ok(quote! {
-                ::windows::core::GUID {
+                ::windows_core::GUID {
                     data1: #data1,
                     data2: #data2,
                     data3: #data3,
@@ -469,7 +469,7 @@ impl Guid {
             })
         } else {
             Ok(quote! {
-                ::windows::core::GUID::zeroed()
+                ::windows_core::GUID::zeroed()
             })
         }
     }

crates/libs/windows/Cargo.toml

@@ -24,14 +24,12 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 windows-core = { path = "../core", version = "0.55.0" }
 windows-targets = { path = "../targets", version = "0.52.4" }
-windows-implement = { path = "../implement",  version = "0.53.0", optional = true }
-windows-interface = { path = "../interface",  version = "0.53.0", optional = true }
 
 [features]
 default = []
 docs = []
 deprecated = []
-implement = ["windows-implement", "windows-interface", "windows-core/implement"]
+implement = []
 # generated features
 AI = ["Foundation"]
 AI_MachineLearning = ["AI"]

crates/libs/windows/src/Windows/Foundation/Collections/impl.rs

@@ -708,7 +708,7 @@ impl<T: windows_core::RuntimeType + 'static> IVectorView_Vtbl<T> {
         iid == &<IVectorView<T> as windows_core::Interface>::IID
     }
 }
-#[::windows_implement::implement(IIterable<T>)]
+#[windows_core::implement(IIterable<T>)]
 struct StockIterable<T>
 where
     T: windows_core::RuntimeType + 'static,
@@ -731,7 +731,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<T>)]
+#[windows_core::implement(IIterator<T>)]
 struct StockIterator<T>
 where
     T: windows_core::RuntimeType + 'static,
@@ -798,7 +798,7 @@ where
         Ok(StockIterable { values }.into())
     }
 }
-#[::windows_implement::implement(IMapView<K, V>, IIterable<IKeyValuePair<K, V>>)]
+#[windows_core::implement(IMapView<K, V>, IIterable<IKeyValuePair<K, V>>)]
 struct StockMapView<K, V>
 where
     K: windows_core::RuntimeType + 'static,
@@ -849,7 +849,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<IKeyValuePair<K, V>>)]
+#[windows_core::implement(IIterator<IKeyValuePair<K, V>>)]
 struct StockMapViewIterator<'a, K, V>
 where
     K: windows_core::RuntimeType + 'static,
@@ -908,7 +908,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IKeyValuePair<K, V>)]
+#[windows_core::implement(IKeyValuePair<K, V>)]
 struct StockKeyValuePair<K, V>
 where
     K: windows_core::RuntimeType + 'static,
@@ -948,7 +948,7 @@ where
         Ok(StockMapView { map }.into())
     }
 }
-#[::windows_implement::implement(IVectorView<T>, IIterable<T>)]
+#[windows_core::implement(IVectorView<T>, IIterable<T>)]
 struct StockVectorView<T>
 where
     T: windows_core::RuntimeType + 'static,
@@ -1004,7 +1004,7 @@ where
     }
 }
 
-#[::windows_implement::implement(IIterator<T>)]
+#[windows_core::implement(IIterator<T>)]
 struct StockVectorViewIterator<T>
 where
     T: windows_core::RuntimeType + 'static,

crates/libs/windows/src/lib.rs

@@ -13,14 +13,6 @@ Learn more about Rust for Windows here: <https://github.com/microsoft/windows-rs
 #[allow(unused_extern_crates)]
 extern crate self as windows;
 
-pub mod core {
-    pub use windows_core::*;
-
-    #[cfg(feature = "implement")]
-    pub use windows_implement::implement;
-
-    #[cfg(feature = "implement")]
-    pub use windows_interface::interface;
-}
+pub use windows_core as core;
 
 include!("Windows/mod.rs");

crates/samples/windows/bits/Cargo.toml

@@ -11,3 +11,6 @@ features = [
     "Win32_System_Com",
     "Win32_Networking_BackgroundIntelligentTransferService",
 ]
+
+[dependencies.windows-core]
+path = "../../../libs/core"

crates/samples/windows/core_app/Cargo.toml

@@ -14,3 +14,6 @@ features = [
     "Win32_System_Com",
     "Win32_UI_WindowsAndMessaging"
 ]
+
+[dependencies.windows-core]
+path = "../../../libs/core"

crates/tests/collections/Cargo.toml

@@ -12,3 +12,6 @@ features = [
     "Globalization",
     "Win32_Foundation",
 ]
+
+[dependencies.windows-core]
+path = "../../libs/core"

crates/tests/core/Cargo.toml

@@ -15,6 +15,9 @@ features = [
     "Win32_Media_Audio",
 ]
 
+[dependencies.windows-core]
+path = "../../libs/core"
+
 [dependencies.windows-targets]
 path = "../../libs/targets"
 

crates/tests/debugger_visualizer/Cargo.toml

@@ -12,6 +12,9 @@ features = [
     "Win32_Foundation",
 ]
 
+[dependencies.windows-core]
+path = "../../libs/core"
+
 [dev-dependencies]
 debugger_test = "0.1.0"
 debugger_test_parser = "0.1.0"

crates/tests/implement/Cargo.toml

@@ -22,3 +22,6 @@ features = [
     "Win32_UI_Shell_PropertiesSystem",
     "Win32_System_Variant",
 ]
+
+[dependencies.windows-core]
+path = "../../libs/core"

crates/tests/interface/Cargo.toml

@@ -16,3 +16,6 @@ features = [
     "Win32_System_Com",
     "Win32_System_SystemInformation",
 ]
+
+[dependencies.windows-core]
+path = "../../libs/core"

crates/tests/interface_core/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "test_interface_core"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+[dependencies.windows-core]
+path = "../../libs/core"

crates/tests/interface_core/src/lib.rs

@@ -0,0 +1 @@
+

crates/tests/interface_core/tests/test.rs

@@ -0,0 +1,25 @@
+#![allow(non_snake_case)]
+
+use windows_core::*;
+
+#[interface("72cd87fa-9c99-42e0-8986-84a76f08fc5a")]
+unsafe trait ITest: IUnknown {
+    unsafe fn Test(&self) -> HRESULT;
+}
+
+#[implement(ITest)]
+struct Test;
+
+impl ITest_Impl for Test {
+    unsafe fn Test(&self) -> HRESULT {
+        HRESULT(123)
+    }
+}
+
+#[test]
+fn test() {
+    unsafe {
+        let test: ITest = Test.into();
+        assert_eq!(test.Test(), HRESULT(123));
+    }
+}

crates/tests/no_use/Cargo.toml

@@ -10,3 +10,6 @@ features = [
     "implement",
     "Foundation",
 ]
+
+[dependencies.windows-core]
+path = "../../libs/core"