Improved impl_cast and made all traits Sync + Send + 'static

impl_cast/src/lib.rs

@@ -1,38 +1,47 @@
 pub extern crate paste;
 
+#[macro_export]
+macro_rules! impl_setup {
+    () => {
+        pub trait As<T: ?Sized> {
+            fn consume(self: Box<Self>) -> Option<Box<T>>;
+            fn cast(&self) -> Option<&T>;
+            fn cast_mut(&mut self) -> Option<&mut T>;
+        }
+    };
+}
+
 #[macro_export]
 macro_rules! impl_cast {
     ($base:ident, $trait:ident) => {
         $crate::paste::paste! {
-            pub trait [< As $trait>] {
-                fn consume(self: Box<Self>) -> Option<Box<dyn $trait + Sync + Send>>;
-                fn cast(&self) -> Option<&dyn $trait>;
-                fn cast_mut(&mut self) -> Option<&mut dyn $trait>;
-            }
-
-            impl<T: $base> [< As $trait>] for T {
-                default fn consume(self: Box<Self>) -> Option<Box<dyn $trait + Sync + Send>> {
-                    None
-                }
-                default fn cast(&self) -> Option<&dyn $trait> {
-                    None
-                }
-                default fn cast_mut(&mut self) -> Option<&mut dyn $trait> {
-                    None
-                }
-            }
-
-            impl<T: $base + $trait + Sync + Send + 'static> [< As $trait>] for T {
-                fn consume(self: Box<Self>) -> Option<Box<dyn $trait + Sync + Send>> {
+            impl<T: $base + $trait> As<dyn $trait> for T {
+                fn consume(self: Box<Self>) -> Option<Box<dyn $trait>> {
                     Some(self)
                 }
+
                 fn cast(&self) -> Option<&dyn $trait> {
                     Some(self)
                 }
-                fn cast_mut(&mut self) -> Option<&mut dyn $trait> {
+
+                fn cast_mut(&mut  self) -> Option<&mut dyn $trait> {
                     Some(self)
                 }
             }
+
+            impl<T: $base> As<dyn $trait> for T {
+                default fn consume(self: Box<Self>) -> Option<Box<dyn $trait>> {
+                    None
+                }
+
+                default fn cast(&self) -> Option<&dyn $trait> {
+                    None
+                }
+
+                default fn cast_mut(&mut self) -> Option<&mut dyn $trait> {
+                    None
+                }
+            }
         }
     };
 }