From c740386d6bbb12feac4ab8df50883aa6c300ee83 Mon Sep 17 00:00:00 2001
From: occheung <dc@m-labs.hk>
Date: Fri, 4 Sep 2020 17:52:37 +0800
Subject: [PATCH] scpi: add macro for command struct

---
 src/scpi.rs | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/scpi.rs b/src/scpi.rs
index ce7a202..672cada 100644
--- a/src/scpi.rs
+++ b/src/scpi.rs
@@ -131,7 +131,31 @@ impl<T: Device> Command<T> for HelloWorldCommand {
     }
 }
 
-pub struct Channel1SwitchCommand {}
+macro_rules! declare_channel_commands {
+    ($($header: ident),*) => {
+        mashup! {
+            $(
+                m["channel0" $header] = Channel0 $header Command;
+                m["channel1" $header] = Channel1 $header Command;
+                m["channel2" $header] = Channel2 $header Command;
+                m["channel3" $header] = Channel3 $header Command;
+            )*
+        }
+
+        m! {
+            $(
+                pub struct "channel0" $header {}
+                pub struct "channel1" $header {}
+                pub struct "channel2" $header {}
+                pub struct "channel3" $header {}
+            )*
+        }
+    };
+}
+
+declare_channel_commands!(Switch);
+
+// pub struct Channel1SwitchCommand {}
 impl<T: Device + UrukulTraits> Command<T> for Channel1SwitchCommand {
     nquery!();