Refactor sock option implementations

services/libs/aster-std/src/net/socket/options/macros.rs

@@ -0,0 +1,83 @@
+#[macro_export]
+macro_rules! impl_socket_options {
+    ($(
+        $(#[$outer:meta])*
+        pub struct $name: ident ( $value_ty:ty );
+    )*) => {
+        $(
+            $(#[$outer])*
+            #[derive(Debug)]
+            pub struct $name (Option<$value_ty>);
+
+            impl $name {
+                pub fn new() -> Self {
+                    Self (None)
+                }
+
+                pub fn get(&self) -> Option<&$value_ty> {
+                    self.0.as_ref()
+                }
+
+                pub fn set(&mut self, value: $value_ty) {
+                    self.0 = Some(value);
+                }
+            }
+
+            impl $crate::net::socket::SocketOption for $name {
+                fn as_any(&self) -> &dyn core::any::Any {
+                    self
+                }
+
+                fn as_any_mut(&mut self) -> &mut dyn core::any::Any {
+                    self
+                }
+            }
+
+            impl Default for $name {
+                fn default() -> Self {
+                    Self::new()
+                }
+            }
+        )*
+    };
+}
+
+#[macro_export]
+macro_rules! match_sock_option_ref {
+    (
+        $option:expr, {
+            $( $bind: ident : $ty:ty => $arm:expr ),*,
+            _ => $default:expr
+        }
+    ) => {{
+        let __option : &dyn SocketOption = $option;
+        $(
+            if let Some($bind) = __option.as_any().downcast_ref::<$ty>() {
+                $arm
+            } else
+        )*
+        {
+            $default
+        }
+    }};
+}
+
+#[macro_export]
+macro_rules! match_sock_option_mut {
+    (
+        $option:expr, {
+            $( $bind: ident : $ty:ty => $arm:expr ),*,
+            _ => $default:expr
+        }
+    ) => {{
+        let __option : &mut dyn SocketOption = $option;
+        $(
+            if let Some($bind) = __option.as_any_mut().downcast_mut::<$ty>() {
+                $arm
+            } else
+        )*
+        {
+            $default
+        }
+    }};
+}