[RFC 1/2] rust/qemu-api: Fix fragment-specifiers in define_property macro

[Zhao Liu <zhao1.liu@intel.com>]

From: Junjie Mao <junjie.mao@hotmail.com>

For the matcher of macro, "expr" is used for expressions, while "ident"
is used for variable/function names, and "ty" matches types.

In define_property macro, $field is a member name of type $state, so it
should be defined as "ident", though offset_of! doesn't complain about
this. $type is the type of $field, since it is not used in the macro, so
that no type mismatch error is triggered either.

Fix fragment-specifiers of $field and $type.

Signed-off-by: Junjie Mao <junjie.mao@hotmail.com>
Co-developed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
 rust/qemu-api/src/device_class.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_class.rs
index 1ea95beb78db..be363fd63223 100644
--- a/rust/qemu-api/src/device_class.rs
+++ b/rust/qemu-api/src/device_class.rs
@@ -26,7 +26,7 @@ macro_rules! device_class_init {
 
 #[macro_export]
 macro_rules! define_property {
-    ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr, default = $defval:expr$(,)*) => {
+    ($name:expr, $state:ty, $field:ident, $prop:expr, $type:ty, default = $defval:expr$(,)*) => {
         $crate::bindings::Property {
             name: {
                 #[used]
@@ -47,7 +47,7 @@ macro_rules! define_property {
             link_type: ::core::ptr::null(),
         }
     };
-    ($name:expr, $state:ty, $field:expr, $prop:expr, $type:expr$(,)*) => {
+    ($name:expr, $state:ty, $field:ident, $prop:expr, $type:ty$(,)*) => {
         $crate::bindings::Property {
             name: {
                 #[used]
-- 
2.34.1