commit 4301f3ca51cada2595248758daf64d40be5bbfb1
author David Tolnay <dtolnay@gmail.com> Tue May 05 10:29:52 2020 -0700
committer David Tolnay <dtolnay@gmail.com> Tue May 05 10:29:52 2020 -0700
tree e231e5dc567ed93ccb044d717fbfc9f7c3d535b3
parent a3f6407efac747dc09c73b4edc34799ffdf79abf

Simplify discriminant overflow check

syntax/parse.rs

diff --git a/syntax/parse.rs b/syntax/parse.rs
index 7e4422d..602a269 100644
--- a/syntax/parse.rs
+++ b/syntax/parse.rs
@@ -111,7 +111,7 @@
                 ));
             }
         }
-        if variant.discriminant.is_none() && prev_discriminant.unwrap_or(0) == u32::MAX {
+        if variant.discriminant.is_none() && prev_discriminant == Some(u32::MAX) {
             let msg = format!("discriminant overflow on value after {}", u32::MAX);
             return Err(Error::new_spanned(variant, msg));
         }