Fix #210.

ecmascript/transforms/src/compat/es2015/computed_props/mod.rs

@@ -278,7 +278,7 @@ fn is_complex(props: &[PropOrSpread]) -> bool {
 
 impl<T: StmtLike + VisitWith<ShouldWork>> Fold<Vec<T>> for ComputedProps
 where
-    Vec<T>: FoldWith<Self>,
+    T: FoldWith<Self> + FoldWith<ObjectLitFolder>,
 {
     fn fold(&mut self, stmts: Vec<T>) -> Vec<T> {
         // Fast path when there's no computed properties.
@@ -291,9 +291,6 @@ where
         let mut buf = Vec::with_capacity(stmts.len());
 
         for stmt in stmts {
-            match stmt.try_into_stmt() {
-                Err(module_item) => buf.push(module_item),
-                Ok(stmt) => {
             let mut folder = ObjectLitFolder::default();
             let stmt = stmt.fold_with(&mut folder);
 
@@ -308,9 +305,7 @@ where
                 }))));
             }
 
-                    buf.push(T::from_stmt(stmt));
-                }
-            }
+            buf.push(stmt);
         }
 
         buf

ecmascript/transforms/src/compat/es2015/computed_props/tests.rs

@@ -1,5 +1,19 @@
 use super::*;
 
+test!(
+    ::swc_ecma_parser::Syntax::default(),
+    |_| ComputedProps,
+    issue_210,
+    "
+const b = {[a]: 1}
+export const c = {[a]: 1}
+",
+    "const b = _defineProperty({
+}, a, 1);
+export const c = _defineProperty({
+}, a, 1);"
+);
+
 test!(
     ::swc_ecma_parser::Syntax::default(),
     |_| ComputedProps,