From 8a8bc2adfb8369c6d0d4115dd13268bf341a0662 Mon Sep 17 00:00:00 2001
From: Stephen Chung <schungx@live.com>
Date: Tue, 17 Aug 2021 15:32:12 +0800
Subject: [PATCH] Improve FnPtr debug display.

---
 src/fn_ptr.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/fn_ptr.rs b/src/fn_ptr.rs
index 6815ce0c..3b9350cb 100644
--- a/src/fn_ptr.rs
+++ b/src/fn_ptr.rs
@@ -13,9 +13,19 @@ use std::{
 
 /// A general function pointer, which may carry additional (i.e. curried) argument values
 /// to be passed onto a function during a call.
-#[derive(Debug, Clone, Hash)]
+#[derive(Clone, Hash)]
 pub struct FnPtr(Identifier, StaticVec<Dynamic>);
 
+impl fmt::Debug for FnPtr {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if !self.is_curried() {
+            write!(f, "Fn({})", self.fn_name())
+        } else {
+            f.debug_tuple("Fn").field(&self.0).field(&self.1).finish()
+        }
+    }
+}
+
 impl FnPtr {
     /// Create a new function pointer.
     #[inline(always)]