toplevel atrules within selectors

src/atrule/unknown.rs

@@ -50,27 +50,29 @@ impl UnknownAtRule {
         }
 
         let raw_body = eat_stmts(toks, scope, super_selector)?;
-        let mut body = Vec::with_capacity(raw_body.len());
-        body.push(Spanned {
-            node: Stmt::RuleSet(RuleSet::new()),
-            span: kind_span,
-        });
-        let mut rules = Vec::new();
+        let mut rules = Vec::with_capacity(raw_body.len());
+        let mut body = Vec::new();
+
         for stmt in raw_body {
             match stmt.node {
-                Stmt::Style(..) => rules.push(stmt),
-                _ => body.push(stmt),
+                Stmt::Style(..) => body.push(stmt),
+                _ => rules.push(stmt),
             }
         }
 
-        body[0] = Spanned {
+        if super_selector.is_empty() {
+            body.append(&mut rules);
+        } else {
+            body = vec![Spanned {
                 node: Stmt::RuleSet(RuleSet {
                     selector: super_selector.clone(),
-                rules,
+                    rules: body,
                     super_selector: Selector::new(),
                 }),
                 span: kind_span,
-        };
+            }];
+            body.append(&mut rules);
+        }
 
         Ok(UnknownAtRule {
             name: name.to_owned(),

src/lib.rs

@@ -160,16 +160,6 @@ pub(crate) struct RuleSet {
     super_selector: Selector,
 }
 
-impl RuleSet {
-    pub(crate) const fn new() -> RuleSet {
-        RuleSet {
-            selector: Selector::new(),
-            rules: Vec::new(),
-            super_selector: Selector::new(),
-        }
-    }
-}
-
 /// An intermediate representation of what are essentially single lines
 /// todo! rename this
 #[derive(Clone, Debug)]

src/output.rs

@@ -11,6 +11,7 @@ enum Toplevel {
     MultilineComment(String),
     AtRule(AtRule),
     Newline,
+    Style(Box<Style>),
 }
 
 #[derive(Debug, Clone)]
@@ -98,7 +99,7 @@ impl Css {
                 vals
             }
             Stmt::MultilineComment(s) => vec![Toplevel::MultilineComment(s)],
-            Stmt::Style(_) => panic!("expected toplevel element, found style"),
+            Stmt::Style(s) => vec![Toplevel::Style(s)],
             Stmt::AtRule(r) => vec![Toplevel::AtRule(r)],
         })
     }
@@ -165,6 +166,9 @@ impl Css {
                     }
                     _ => todo!("at-rule other than unknown at toplevel"),
                 },
+                Toplevel::Style(s) => {
+                    writeln!(buf, "{}{}", padding, s.to_string()?)?;
+                }
                 Toplevel::Newline => {
                     if has_written {
                         writeln!(buf)?

tests/media.rs

@@ -20,3 +20,4 @@ test!(
     basic_unknown_at_rule,
     "@foo {\n  a {\n    color: red;\n  }\n}\n"
 );
+test!(unknown_at_rule_no_selector, "@foo {\n  color: red;\n}\n");