re-enabled space = play! but not pause

input/src/edn_input.rs

@@ -15,6 +15,49 @@ pub trait EdnCommand<C>: Command<C> {
 
 /** Implement `EdnCommand` for given `State` and `Command` */
 #[macro_export] macro_rules! edn_command {
+    ($Command:ty : |$state:ident:<$T:ident: $Trait:path>| { $((
+        // identifier
+        $key:literal [
+            // named parameters
+            $(
+                // argument name
+                $arg:ident
+                // if type is not provided defaults to EdnItem
+                $(
+                    // type:name separator
+                    :
+                    // argument type
+                    $type:ty
+                )?
+            ),*
+            // rest of parameters
+            $(, ..$rest:ident)?
+        ]
+        // bound command:
+        $command:expr
+    ))* }) => {
+        impl<$T: $Trait> EdnCommand<$T> for $Command {
+            fn from_edn <'a> (
+                $state: &$T,
+                head: &EdnItem<&str>,
+                tail: &'a [EdnItem<&'a str>]
+            ) -> Option<Self> {
+                $(if let (EdnItem::Key($key), [ // if the identifier matches
+                    // bind argument ids
+                    $($arg),*
+                    // bind rest parameters
+                    $(, $rest @ ..)?
+                ]) = (head, tail) {
+                    $(
+                        $(let $arg: Option<$type> = EdnProvide::<$type>::get($state, $arg);)?
+                    )*
+                    //$(edn_command!(@bind $state => $arg $(?)? : $type);)*
+                    return Some($command)
+                })*
+                None
+            }
+        }
+    };
     ($Command:ty : |$state:ident:$State:ty| { $((
         // identifier
         $key:literal [