rust: qom: convert type_info! macro to an associated const

type_info! is only used in the definition of ObjectImpl::TYPE_INFO, and
in fact in all of them.  Pull type_info!'s definition into the ObjectImpl
trait, thus simplifying the external interface of qemu_api::definitions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 22 insertions, 28 deletions

diff --git a/rust/qemu-api/src/definitions.rs b/rust/qemu-api/src/definitions.rs
index 3291f4242c..6ecfaf51b0 100644
--- a/rust/qemu-api/src/definitions.rs
+++ b/rust/qemu-api/src/definitions.rs
@@ -9,15 +9,34 @@ use std::{ffi::CStr, os::raw::c_void};
 use crate::bindings::{Object, ObjectClass, TypeInfo};
 
 /// Trait a type must implement to be registered with QEMU.
-pub trait ObjectImpl {
-    type Class;
-    const TYPE_INFO: TypeInfo;
+pub trait ObjectImpl: Sized {
+    type Class: ClassInitImpl;
     const TYPE_NAME: &'static CStr;
     const PARENT_TYPE_NAME: Option<&'static CStr>;
     const ABSTRACT: bool = false;
     const INSTANCE_INIT: Option<unsafe extern "C" fn(obj: *mut Object)> = None;
     const INSTANCE_POST_INIT: Option<unsafe extern "C" fn(obj: *mut Object)> = None;
     const INSTANCE_FINALIZE: Option<unsafe extern "C" fn(obj: *mut Object)> = None;
+
+    const TYPE_INFO: TypeInfo = TypeInfo {
+        name: Self::TYPE_NAME.as_ptr(),
+        parent: if let Some(pname) = Self::PARENT_TYPE_NAME {
+            pname.as_ptr()
+        } else {
+            core::ptr::null_mut()
+        },
+        instance_size: core::mem::size_of::<Self>(),
+        instance_align: core::mem::align_of::<Self>(),
+        instance_init: Self::INSTANCE_INIT,
+        instance_post_init: Self::INSTANCE_POST_INIT,
+        instance_finalize: Self::INSTANCE_FINALIZE,
+        abstract_: Self::ABSTRACT,
+        class_size: core::mem::size_of::<Self::Class>(),
+        class_init: <Self::Class as ClassInitImpl>::CLASS_INIT,
+        class_base_init: <Self::Class as ClassInitImpl>::CLASS_BASE_INIT,
+        class_data: core::ptr::null_mut(),
+        interfaces: core::ptr::null_mut(),
+    };
 }
 
 /// Trait used to fill in a class struct.
@@ -83,28 +102,3 @@ macro_rules! module_init {
         }
     };
 }
-
-#[macro_export]
-macro_rules! type_info {
-    ($t:ty) => {
-        $crate::bindings::TypeInfo {
-            name: <$t as $crate::definitions::ObjectImpl>::TYPE_NAME.as_ptr(),
-            parent: if let Some(pname) = <$t as $crate::definitions::ObjectImpl>::PARENT_TYPE_NAME {
-                pname.as_ptr()
-            } else {
-                ::core::ptr::null_mut()
-            },
-            instance_size: ::core::mem::size_of::<$t>(),
-            instance_align: ::core::mem::align_of::<$t>(),
-            instance_init: <$t as $crate::definitions::ObjectImpl>::INSTANCE_INIT,
-            instance_post_init: <$t as $crate::definitions::ObjectImpl>::INSTANCE_POST_INIT,
-            instance_finalize: <$t as $crate::definitions::ObjectImpl>::INSTANCE_FINALIZE,
-            abstract_: <$t as $crate::definitions::ObjectImpl>::ABSTRACT,
-            class_size:  ::core::mem::size_of::<<$t as $crate::definitions::ObjectImpl>::Class>(),
-            class_init: <<$t as $crate::definitions::ObjectImpl>::Class as $crate::definitions::ClassInitImpl>::CLASS_INIT,
-            class_base_init: <<$t as $crate::definitions::ObjectImpl>::Class as $crate::definitions::ClassInitImpl>::CLASS_BASE_INIT,
-            class_data: ::core::ptr::null_mut(),
-            interfaces: ::core::ptr::null_mut(),
-        };
-    }
-}