Make method_new example compilable

Author: dtolnay

README.md

@@ -127,9 +127,13 @@ use paste::paste;
 
 macro_rules! method_new {
     ($ret:ident) => {
-        paste! {
-            #[doc = "Create a new `" $ret "` object."]
-            pub fn new() -> $ret { todo!() }
+        pub struct $ret {}
+
+        impl $ret {
+            paste! {
+                #[doc = "Create a new `" $ret "` object."]
+                pub fn new() -> $ret { todo!() }
+            }
         }
     };
 }

src/lib.rs

@@ -125,14 +125,17 @@
 //!
 //! macro_rules! method_new {
 //!     ($ret:ident) => {
-//!         paste! {
-//!             #[doc = "Create a new `" $ret "` object."]
-//!             pub fn new() -> $ret { todo!() }
+//!         pub struct $ret {}
+//!
+//!         impl $ret {
+//!             paste! {
+//!                 #[doc = "Create a new `" $ret "` object."]
+//!                 pub fn new() -> $ret { todo!() }
+//!             }
 //!         }
 //!     };
 //! }
 //!
-//! # struct Paste;
 //! method_new!(Paste);  // expands to #[doc = "Create a new `Paste` object"]
 //! ```