Test exhaustiveness of expr match

.github/workflows/ci.yml

@@ -54,6 +54,8 @@ jobs:
       - run: cargo update
       - run: cargo check
       - run: cargo test
+        env:
+          RUSTFLAGS: ${{env.RUSTFLAGS}} ${{matrix.rust == 'nightly' && '--cfg exhaustive' || ''}}
 
   clippy:
     name: Clippy

src/edit.rs

@@ -60,7 +60,7 @@ fn remove_doc_attributes(attrs: &mut Vec<Attribute>) {
 
 fn attrs_mut(e: &mut Expr) -> Option<&mut Vec<Attribute>> {
     match e {
-        | Expr::Array(ExprArray { attrs, .. })
+        Expr::Array(ExprArray { attrs, .. })
         | Expr::Assign(ExprAssign { attrs, .. })
         | Expr::AssignOp(ExprAssignOp { attrs, .. })
         | Expr::Async(ExprAsync { attrs, .. })
@@ -99,6 +99,10 @@ fn attrs_mut(e: &mut Expr) -> Option<&mut Vec<Attribute>> {
         | Expr::Unsafe(ExprUnsafe { attrs, .. })
         | Expr::While(ExprWhile { attrs, .. })
         | Expr::Yield(ExprYield { attrs, .. }) => Some(attrs),
+
+        Expr::Verbatim(_) => None,
+
+        #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
         _ => None,
     }
 }

src/main.rs

@@ -14,6 +14,7 @@
     clippy::too_many_lines,
     clippy::trivially_copy_pass_by_ref
 )]
+#![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
 
 mod cmd;
 mod config;