From ae9544aaf96b505f2b1b9a2f583d3c945cf4543d Mon Sep 17 00:00:00 2001
From: Graham Esau <gesau@hotmail.co.uk>
Date: Sat, 11 Nov 2023 20:28:10 +0000
Subject: [PATCH] Put schema value into a variable before calling
 apply_metadata

This reduces size of MIR output, which should somewhat mitigate #246
---
 schemars_derive/src/metadata.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/schemars_derive/src/metadata.rs b/schemars_derive/src/metadata.rs
index 32dbf671..e9637044 100644
--- a/schemars_derive/src/metadata.rs
+++ b/schemars_derive/src/metadata.rs
@@ -15,12 +15,13 @@ impl<'a> SchemaMetadata<'a> {
     pub fn apply_to_schema(&self, schema_expr: &mut TokenStream) {
         let setters = self.make_setters();
         if !setters.is_empty() {
-            *schema_expr = quote! {
-                schemars::_private::apply_metadata(#schema_expr, schemars::schema::Metadata {
+            *schema_expr = quote! {{
+                let schema = #schema_expr;
+                schemars::_private::apply_metadata(schema, schemars::schema::Metadata {
                     #(#setters)*
                     ..Default::default()
                 })
-            }
+            }}
         }
     }