deps: update to syn 2.0 (#317)

BurntSushi · Mar 6, 2025 · 9ddbbd6 · 9ddbbd6
1 parent 238f340
commit 9ddbbd6
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/quickcheck_macros/Cargo.toml b/quickcheck_macros/Cargo.toml
@@ -20,7 +20,7 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }
 
 [dev-dependencies]
 quickcheck = { path = "..", version = "1.0.0" }
diff --git a/quickcheck_macros/src/lib.rs b/quickcheck_macros/src/lib.rs
@@ -28,14 +28,21 @@ pub fn quickcheck(_args: TokenStream, input: TokenStream) -> TokenStream {
             if errors.is_empty() {
                 let attrs = mem::take(&mut item_fn.attrs);
                 let name = &item_fn.sig.ident;
+                if let Some(variadic) = &item_fn.sig.variadic {
+                    // variadics are just for `extern fn`
+                    errors.push(syn::parse::Error::new(
+                        variadic.span(),
+                        "unsupported variadic",
+                    ));
+                }
                 let fn_type = syn::TypeBareFn {
                     lifetimes: None,
                     unsafety: item_fn.sig.unsafety,
                     abi: item_fn.sig.abi.clone(),
                     fn_token: <syn::Token![fn]>::default(),
                     paren_token: syn::token::Paren::default(),
                     inputs,
-                    variadic: item_fn.sig.variadic.clone(),
+                    variadic: None,
                     output: item_fn.sig.output.clone(),
                 };