1 files changed, 5 insertions, 0 deletions
diff --git a/src/eval/func.rs b/src/eval/func.rs
index faf2d696..29b85f7a 100644
--- a/src/eval/func.rs
+++ b/src/eval/func.rs
@@ -274,6 +274,8 @@ pub enum Param {
     Named(Ident, Value),
     /// An argument sink: `..args`.
     Sink(Option<Ident>),
+    /// A placeholder: `_`.
+    Placeholder,
 }
 
 impl Closure {
@@ -334,6 +336,9 @@ impl Closure {
                         args.named::<Value>(ident)?.unwrap_or_else(|| default.clone());
                     vm.define(ident.clone(), value);
                 }
+                Param::Placeholder => {
+                    args.eat::<Value>()?;
+                }
             }
         }