Rust: drop AssocItem and ExternItem classes

Author: aibaars

rust/ast-generator/src/main.rs

@@ -24,6 +24,8 @@ fn class_name(type_name: &str) -> String {
         "ArrayExpr" => "ArrayExprInternal".to_owned(),
         "AsmOptions" => "AsmOptionsList".to_owned(),
         "MacroStmts" => "MacroBlockExpr".to_owned(),
+        "AssocItem" => "Item".to_owned(),
+        "ExternItem" => "Item".to_owned(),
         _ if type_name.starts_with("Record") => type_name.replacen("Record", "Struct", 1),
         _ if type_name.ends_with("Type") => format!("{}Repr", type_name),
         _ => type_name.to_owned(),
@@ -88,7 +90,7 @@ struct Schema {
 fn get_bases(name: &str, super_types: &BTreeMap<String, BTreeSet<String>>) -> Vec<String> {
     super_types
         .get(name)
-        .map(|tys| tys.iter().map(|t| class_name(t)).collect())
+        .map(|tys| tys.iter().map(|t| class_name(t)).unique().collect())
         .unwrap_or_else(|| vec!["AstNode".to_string()])
 }