From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 2 Apr 2021 16:56:08 +0000 (+0100)
Subject: if_let: Let variants be paths
X-Git-Tag: otter-0.5.0~312
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=c6aa39d9ad9c679e3e34fd561899786ba37e4a69;p=otter.git

if_let: Let variants be paths

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

diff --git a/base/misc.rs b/base/misc.rs
index 26a7ca67..7ee1c6f5 100644
--- a/base/misc.rs
+++ b/base/misc.rs
@@ -67,12 +67,12 @@ pub fn space_rect_attrs(table_size: PosC<f64>) -> SvgAttrs {
 
 #[macro_export]
 macro_rules! if_let {
-  { $variant:ident($binding:pat) = $input:expr;
+  { $($variant:ident)::+ ($binding:pat) = $input:expr;
     else $($otherwise:tt)*
   } => {
     let $binding = match $input {
-      $variant(y) => y,
+      $($variant)::+ (y) => y,
       _ => { $($otherwise)* },
     };
-  }
+  };
 }