From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 1 Feb 2021 01:19:35 +0000 (+0000)
Subject: visible slotmap keys: Break out impl_for_slotmap_key
X-Git-Tag: otter-0.4.0~557
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=c04d51b0a127ccf2f54f110fb9ceb66334d5a254;p=otter.git

visible slotmap keys: Break out impl_for_slotmap_key

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/src/keydata.rs b/src/keydata.rs
index 89d5e846..48766e32 100644
--- a/src/keydata.rs
+++ b/src/keydata.rs
@@ -52,6 +52,12 @@ macro_rules! visible_slotmap_key {
     #[serde(try_from="String")]
     pub struct $x(pub slotmap::KeyData);
 
+    impl_for_slotmap_key!($x($sep));
+  }
+}
+#[macro_export]
+macro_rules! impl_for_slotmap_key {
+  ( $x:ident($sep:expr) ) => {
     impl Display for $x {
       #[throws(fmt::Error)]
       fn fmt(&self, f: &mut fmt::Formatter) { slotkey_write(self.0,$sep,f)? }
@@ -84,3 +90,4 @@ macro_rules! visible_slotmap_key {
   }
 }
 pub use crate::visible_slotmap_key; // this is madness!
+pub use crate::impl_for_slotmap_key; // this is madness!