Revert "support arbitrary discriminant types"

This reverts commit 742d208ac173051086468173064548216c14b5f0.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 24040b9..4e9a23d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -119,7 +119,7 @@ pub fn derive_deserialize(item: TokenStream) -> TokenStream {
         if let Some(attr) = args.discriminant_for {
             out.extend(
                 vec![quote!(
-                    let mut discriminant = Default::default();
+                    let mut discriminant = 0u8;
                     discriminant.deserialize(r)?;
 
                     discriminant_for.insert(#attr, discriminant);