From c9de0146ea191f83da34fbe6ec014aad4c6da14f Mon Sep 17 00:00:00 2001
From: OJ Kwon <kwon.ohjoong@gmail.com>
Date: Wed, 29 Jun 2022 15:18:00 -0700
Subject: [PATCH 1/2] feat(swc/common): interfaces for versioned wrapper

---
 crates/swc_common/src/plugin.rs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/crates/swc_common/src/plugin.rs b/crates/swc_common/src/plugin.rs
index afc77ad33fb6..08d7e7baac93 100644
--- a/crates/swc_common/src/plugin.rs
+++ b/crates/swc_common/src/plugin.rs
@@ -174,4 +174,20 @@ impl Serialized {
 #[derive(Archive, Deserialize, Serialize)]
 #[repr(transparent)]
 #[archive_attr(repr(transparent), derive(CheckBytes))]
-pub struct VersionedSerializable<T>(#[with(AsBox)] pub (u32, T));
+pub struct VersionedSerializable<T>(#[with(AsBox)] (u32, T));
+
+impl<T> VersionedSerializable<T> {
+    pub fn new(value: T) -> Self {
+        // TODO: we'll add compile time flag to augment schema version per binary.
+        // User should not try to set version by themselves.
+        VersionedSerializable((1, value))
+    }
+
+    pub fn version(&self) -> u32 {
+        self.0 .0
+    }
+
+    pub fn inner(&self) -> &T {
+        &self.0 .1
+    }
+}

From 72a3930320ee2f5f034be333a9661bfa445b7034 Mon Sep 17 00:00:00 2001
From: OJ Kwon <kwon.ohjoong@gmail.com>
Date: Wed, 29 Jun 2022 16:23:15 -0700
Subject: [PATCH 2/2] feat(swc/common): allow to take inner from versioned

---
 crates/swc_common/src/plugin.rs   | 11 +++++++++--
 crates/swc_ecma_ast/src/module.rs |  6 ++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/crates/swc_common/src/plugin.rs b/crates/swc_common/src/plugin.rs
index 08d7e7baac93..ff55d2c706ea 100644
--- a/crates/swc_common/src/plugin.rs
+++ b/crates/swc_common/src/plugin.rs
@@ -4,7 +4,7 @@
 //! `swc_common`.
 #![allow(unused)]
 
-use std::any::type_name;
+use std::{any::type_name, mem};
 
 use anyhow::Error;
 use bytecheck::CheckBytes;
@@ -178,7 +178,7 @@ pub struct VersionedSerializable<T>(#[with(AsBox)] (u32, T));
 
 impl<T> VersionedSerializable<T> {
     pub fn new(value: T) -> Self {
-        // TODO: we'll add compile time flag to augment schema version per binary.
+        // TODO: we'll add compile time flag to augment schema version.
         // User should not try to set version by themselves.
         VersionedSerializable((1, value))
     }
@@ -190,4 +190,11 @@ impl<T> VersionedSerializable<T> {
     pub fn inner(&self) -> &T {
         &self.0 .1
     }
+
+    pub fn take(&mut self) -> T
+    where
+        T: Default,
+    {
+        mem::take(&mut self.0 .1)
+    }
 }
diff --git a/crates/swc_ecma_ast/src/module.rs b/crates/swc_ecma_ast/src/module.rs
index 4bc570f110a4..838a33bf3350 100644
--- a/crates/swc_ecma_ast/src/module.rs
+++ b/crates/swc_ecma_ast/src/module.rs
@@ -14,6 +14,12 @@ pub enum Program {
     Script(Script),
 }
 
+impl Default for Program {
+    fn default() -> Self {
+        Program::Module(Module::dummy())
+    }
+}
+
 #[ast_node("Module")]
 #[derive(Eq, Hash, EqIgnoreSpan)]
 pub struct Module {