Rust: remove VariantDef

Author: redsun82

rust/ast-generator/src/main.rs

@@ -385,8 +385,8 @@ struct ExtractorInfo {
 }
 
 fn enum_to_extractor_info(node: &AstEnumSrc) -> Option<ExtractorEnumInfo> {
-    if matches!(node.name.as_str(), "VariantDef" | "Adt") {
-        // these are not used as types of fields, so we don't need to generate extractors for them
+    if node.name == "Adt" {
+        // no fields have `Adt` type, so we don't need extraction for it
         return None;
     }
     Some(ExtractorEnumInfo {
@@ -484,6 +484,8 @@ fn main() -> anyhow::Result<()> {
         .parse()
         .expect("Failed to parse grammar");
     let mut grammar = codegen::grammar::lower(&grammar);
+    // remove the VariantDef enum, there is no use for it at the moment
+    grammar.enums.retain(|e| e.name != "VariantDef");
 
     let mut super_types: BTreeMap<String, BTreeSet<String>> = BTreeMap::new();
     for node in &grammar.enums {