refactor(ast): Make ast enum non_exhaustive

crates/ast_node/src/lib.rs

@@ -158,29 +158,34 @@ pub fn ast_node(
     let mut item = TokenStream::new();
     match input.data {
         Data::Enum(..) => {
-            struct EnumArgs {
-                clone: bool,
-            }
-            impl parse::Parse for EnumArgs {
-                fn parse(i: parse::ParseStream<'_>) -> syn::Result<Self> {
-                    let name: Ident = i.parse()?;
-                    if name != "no_clone" {
-                        return Err(i.error("unknown attribute"));
-                    }
-                    Ok(EnumArgs { clone: false })
+            use syn::parse::Parser;
+
+            let attrs = <syn::punctuated::Punctuated<syn::Ident, syn::Token![,]>>::parse_terminated
+                .parse(args)
+                .expect("failed to parse #[ast_node]");
+
+            let mut has_no_clone = false;
+            let mut has_no_unknown = false;
+            for attr in &attrs {
+                if attr == "no_clone" {
+                    has_no_clone = true;
+                } else if attr == "no_unknown" {
+                    has_no_unknown = true;
+                } else {
+                    panic!("unknown attribute: {attr:?}")
                 }
             }
-            let args = if args.is_empty() {
-                EnumArgs { clone: true }
-            } else {
-                parse(args).expect("failed to parse args of #[ast_node]")
-            };
 
-            let clone = if args.clone {
+            let clone = if !has_no_clone {
                 Some(quote!(#[derive(Clone)]))
             } else {
                 None
             };
+            let non_exhaustive = if !has_no_unknown {
+                Some(quote!(#[cfg_attr(feature = "unknown", non_exhaustive)]))
+            } else {
+                None
+            };
 
             item.extend(quote!(
                 #[allow(clippy::derive_partial_eq_without_eq)]
@@ -198,6 +203,7 @@ pub fn ast_node(
                     ::swc_common::DeserializeEnum,
                 )]
                 #clone
+                #non_exhaustive
                 #[cfg_attr(
                     feature = "rkyv-impl",
                     derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)

crates/swc_css_ast/src/at_rule.rs

@@ -18,7 +18,7 @@ pub struct AtRule {
     pub block: Option<SimpleBlock>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum AtRuleName {
     #[tag("DashedIdent")]
@@ -46,7 +46,7 @@ impl PartialEq<Atom> for AtRuleName {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum AtRulePrelude {
     #[tag("ListOfComponentValues")]
@@ -99,7 +99,7 @@ pub struct ScopeRange {
     pub scope_end: Option<ForgivingSelectorList>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ColorProfileName {
     #[tag("DashedIdent")]
@@ -122,7 +122,7 @@ pub struct FontFeatureValuesPrelude {
     pub font_family: Vec<FamilyName>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum DocumentPreludeMatchingFunction {
     #[tag("Url")]
@@ -131,7 +131,7 @@ pub enum DocumentPreludeMatchingFunction {
     Function(Function),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum KeyframesName {
     #[tag("CustomIdent")]
@@ -170,7 +170,7 @@ pub struct KeyframeBlock {
     pub block: SimpleBlock,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum KeyframeSelector {
     #[tag("Ident")]
@@ -188,7 +188,7 @@ pub struct ImportPrelude {
     pub import_conditions: Option<Box<ImportConditions>>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ImportHref {
     #[tag("Url")]
@@ -197,7 +197,7 @@ pub enum ImportHref {
     Str(Str),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ImportLayerName {
     #[tag("Ident")]
@@ -222,7 +222,7 @@ pub struct NamespacePrelude {
     pub uri: Box<NamespacePreludeUri>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum NamespacePreludeUri {
     #[tag("Url")]
@@ -269,14 +269,14 @@ impl EqIgnoreSpan for MediaQuery {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaType {
     #[tag("Ident")]
     Ident(Ident),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaConditionType {
     #[tag("MediaCondition")]
@@ -300,7 +300,7 @@ pub struct MediaConditionWithoutOr {
     pub conditions: Vec<MediaConditionWithoutOrType>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaConditionAllType {
     #[tag("MediaNot")]
@@ -316,7 +316,7 @@ pub enum MediaConditionAllType {
     MediaInParens(MediaInParens),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaConditionWithoutOrType {
     #[tag("MediaNot")]
@@ -371,7 +371,7 @@ impl EqIgnoreSpan for MediaOr {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaInParens {
     #[tag("MediaCondition")]
@@ -384,7 +384,7 @@ pub enum MediaInParens {
     GeneralEnclosed(GeneralEnclosed),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaFeature {
     #[tag("MediaFeaturePlain")]
@@ -400,7 +400,7 @@ pub enum MediaFeature {
     RangeInterval(MediaFeatureRangeInterval),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaFeatureName {
     #[tag("Ident")]
@@ -410,7 +410,7 @@ pub enum MediaFeatureName {
     ExtensionName(ExtensionName),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum MediaFeatureValue {
     #[tag("Number")]
@@ -502,7 +502,7 @@ pub struct SupportsCondition {
     pub conditions: Vec<SupportsConditionType>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SupportsConditionType {
     #[tag("SupportsNot")]
@@ -560,7 +560,7 @@ impl EqIgnoreSpan for SupportsOr {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SupportsInParens {
     #[tag("SupportsCondition")]
@@ -573,7 +573,7 @@ pub enum SupportsInParens {
     GeneralEnclosed(GeneralEnclosed),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SupportsFeature {
     #[tag("Declaration")]
@@ -582,7 +582,7 @@ pub enum SupportsFeature {
     Function(Function),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum GeneralEnclosed {
     #[tag("Function")]
@@ -620,7 +620,7 @@ pub struct PageSelectorPseudo {
     pub value: Ident,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum LayerPrelude {
     #[tag("LayerName")]
@@ -651,7 +651,7 @@ pub struct ContainerCondition {
     pub query: ContainerQuery,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ContainerName {
     #[tag("CustomIdent")]
@@ -665,7 +665,7 @@ pub struct ContainerQuery {
     pub queries: Vec<ContainerQueryType>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ContainerQueryType {
     #[tag("ContainerQueryNot")]
@@ -723,7 +723,7 @@ impl EqIgnoreSpan for ContainerQueryOr {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum QueryInParens {
     #[tag("ContainerQuery")]
@@ -740,7 +740,7 @@ pub enum QueryInParens {
     GeneralEnclosed(GeneralEnclosed),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SizeFeature {
     #[tag("SizeFeaturePlain")]
@@ -822,7 +822,7 @@ pub struct SizeFeatureRangeInterval {
     pub right: Box<SizeFeatureValue>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SizeFeatureValue {
     #[tag("Number")]
@@ -841,7 +841,7 @@ pub enum SizeFeatureValue {
     Function(Function),
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum SizeFeatureName {
     #[tag("Ident")]
@@ -893,7 +893,7 @@ impl Take for CustomMediaQuery {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum CustomMediaQueryMediaType {
     #[tag("Ident")]

crates/swc_css_ast/src/base.rs

@@ -16,7 +16,7 @@ pub struct Stylesheet {
     pub rules: Vec<Rule>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum Rule {
     #[tag("QualifiedRule")]
@@ -53,7 +53,7 @@ impl Take for QualifiedRule {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum QualifiedRulePrelude {
     #[tag("SelectorList")]
@@ -70,7 +70,7 @@ impl Take for QualifiedRulePrelude {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum StyleBlock {
     #[tag("AtRule")]
@@ -101,7 +101,7 @@ impl Take for SimpleBlock {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum FunctionName {
     #[tag("Ident")]
@@ -162,7 +162,7 @@ pub struct ListOfComponentValues {
     pub children: Vec<ComponentValue>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum ComponentValue {
     // No grammar
@@ -284,7 +284,7 @@ impl From<Rule> for ComponentValue {
     }
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum DeclarationOrAtRule {
     #[tag("Declaration")]
@@ -306,7 +306,7 @@ pub struct Declaration {
     pub important: Option<ImportantFlag>,
 }
 
-#[ast_node]
+#[ast_node(no_unknown)]
 #[derive(Eq, Hash, Is, EqIgnoreSpan)]
 pub enum DeclarationName {
     #[tag("Ident")]