From 497333e91bde18be48800a82e9d7ff3c78ded95c Mon Sep 17 00:00:00 2001
From: Graham Esau <gesau@hotmail.co.uk>
Date: Sun, 1 Sep 2024 11:30:54 +0100
Subject: [PATCH] Replace placeholder error message

---
 schemars_derive/src/schema_exprs.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/schemars_derive/src/schema_exprs.rs b/schemars_derive/src/schema_exprs.rs
index 976bbe04..3e1b4862 100644
--- a/schemars_derive/src/schema_exprs.rs
+++ b/schemars_derive/src/schema_exprs.rs
@@ -76,7 +76,12 @@ pub fn expr_for_repr(cont: &Container) -> Result<SchemaExpr, syn::Error> {
 
     let variants = match &cont.data {
         Data::Enum(variants) => variants,
-        _ => return Err(syn::Error::new(Span::call_site(), "oh no!")),
+        _ => {
+            return Err(syn::Error::new(
+                Span::call_site(),
+                "JsonSchema_repr can only be used on enums",
+            ))
+        }
     };
 
     if let Some(non_unit_error) = variants.iter().find_map(|v| match v.style {