macros: Update to syn 3.0

Author: tgross35

Cargo.lock

@@ -68,7 +68,7 @@ regex = "1.12.3"
 rug = { version = "1.28.1", default-features = false, features = ["float", "integer", "std"] }
 rustc_apfloat = "0.2.3"
 serde_json = "1.0.149"
-syn = "2.0.115"
+syn = "3.0.3"
 tempfile = "3.25.0"
 
 [profile.release]

Cargo.toml

@@ -181,7 +181,6 @@ fn extract_fn_extra_field(expr: Expr) -> syn::Result<BTreeMap<Ident, Expr>> {
         let Arm {
             attrs,
             pat,
-            guard,
             fat_arrow_token: _,
             body,
             comma: _,
@@ -190,15 +189,15 @@ fn extract_fn_extra_field(expr: Expr) -> syn::Result<BTreeMap<Ident, Expr>> {
         expect_empty_attrs(&attrs)?;
 
         let keys = match pat {
+            syn::Pat::Ident(id) => Parser::parse2(parse_ident_pat, id.into_token_stream())?,
+            syn::Pat::Or(or) => Parser::parse2(parse_ident_pat, or.into_token_stream())?,
             syn::Pat::Wild(w) => vec![Ident::new("_", w.span())],
-            _ => Parser::parse2(parse_ident_pat, pat.into_token_stream())?,
+            _ => {
+                let e = syn::Error::new(pat.span(), "unsupported pattern type");
+                return Err(e);
+            }
         };
 
-        if let Some(guard) = guard {
-            let e = syn::Error::new(guard.0.span(), "no guards allowed in this position");
-            return Err(e);
-        }
-
         for key in keys {
             let inserted = res.insert(key.clone(), *body.clone());
             if inserted.is_some() {