From df00e2fd71ea7139ad8ab713b32a0f6792b6c094 Mon Sep 17 00:00:00 2001
From: Graham Esau <gesau@hotmail.co.uk>
Date: Sun, 28 Apr 2024 18:59:42 +0100
Subject: [PATCH] Add comment explaining why we double-parse an `Expr`

---
 schemars_derive/src/attr/validation.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/schemars_derive/src/attr/validation.rs b/schemars_derive/src/attr/validation.rs
index b0af2c59..a511ab41 100644
--- a/schemars_derive/src/attr/validation.rs
+++ b/schemars_derive/src/attr/validation.rs
@@ -510,6 +510,7 @@ fn wrap_string_validation(v: Vec<TokenStream>) -> Option<TokenStream> {
 }
 
 fn str_or_num_to_expr(cx: &Ctxt, meta_item_name: &str, expr: Expr) -> Option<Expr> {
+    // this odd double-parsing is to make `-10` parsed as an Lit instead of an Expr::Unary
     let lit: Lit = match syn::parse2(expr.to_token_stream()) {
         Ok(l) => l,
         Err(err) => {