feat(es): Improve APIs for plugin authors (#5632)

- All variants of `Expr` now implement `Into<Box<Expr>>`.
 - All variants of `Expr` now implement `Into<PatOrExpr>`.
 - All variants of `Pat` now implement `Into<PatOrExpr>`.
 - All variants of `Pat` now implement `Into<Param>`.
 - `StmtOrModuleItem` is improved.

crates/swc_ecma_ast/src/expr.rs

@@ -265,11 +265,51 @@ impl Take for Expr {
 
 bridge_expr_from!(Ident, Id);
 bridge_expr_from!(FnExpr, Function);
+bridge_expr_from!(ClassExpr, Class);
 
-bridge_from!(Box<Expr>, Expr, ArrayLit);
-bridge_from!(Box<Expr>, Expr, ObjectLit);
-bridge_from!(Box<Expr>, Expr, MemberExpr);
-bridge_from!(Box<Expr>, Expr, SuperPropExpr);
+macro_rules! boxed_expr {
+    ($T:ty) => {
+        bridge_from!(Box<Expr>, Expr, $T);
+        bridge_from!(PatOrExpr, Box<Expr>, $T);
+    };
+}
+
+boxed_expr!(ThisExpr);
+boxed_expr!(ArrayLit);
+boxed_expr!(ObjectLit);
+boxed_expr!(FnExpr);
+boxed_expr!(UnaryExpr);
+boxed_expr!(UpdateExpr);
+boxed_expr!(BinExpr);
+boxed_expr!(AssignExpr);
+boxed_expr!(MemberExpr);
+boxed_expr!(SuperPropExpr);
+boxed_expr!(CondExpr);
+boxed_expr!(CallExpr);
+boxed_expr!(NewExpr);
+boxed_expr!(SeqExpr);
+bridge_from!(Box<Expr>, Expr, Ident);
+boxed_expr!(Lit);
+boxed_expr!(Tpl);
+boxed_expr!(TaggedTpl);
+boxed_expr!(ArrowExpr);
+boxed_expr!(ClassExpr);
+boxed_expr!(YieldExpr);
+boxed_expr!(MetaPropExpr);
+boxed_expr!(AwaitExpr);
+boxed_expr!(ParenExpr);
+boxed_expr!(JSXMemberExpr);
+boxed_expr!(JSXNamespacedName);
+boxed_expr!(JSXEmptyExpr);
+boxed_expr!(Box<JSXElement>);
+boxed_expr!(JSXFragment);
+boxed_expr!(TsTypeAssertion);
+boxed_expr!(TsConstAssertion);
+boxed_expr!(TsNonNullExpr);
+boxed_expr!(TsAsExpr);
+boxed_expr!(TsInstantiation);
+boxed_expr!(PrivateName);
+boxed_expr!(OptChainExpr);
 
 #[ast_node("ThisExpression")]
 #[derive(Eq, Hash, Copy, EqIgnoreSpan)]
@@ -494,6 +534,12 @@ impl Take for ClassExpr {
     }
 }
 
+impl From<Class> for ClassExpr {
+    fn from(class: Class) -> Self {
+        Self { ident: None, class }
+    }
+}
+
 #[derive(Spanned, Clone, Debug, PartialEq, Serialize)]
 #[cfg_attr(
     feature = "rkyv",
@@ -1168,9 +1214,6 @@ pub enum PatOrExpr {
 bridge_from!(PatOrExpr, Box<Pat>, Pat);
 bridge_from!(PatOrExpr, Pat, Ident);
 bridge_from!(PatOrExpr, Pat, Id);
-bridge_from!(PatOrExpr, Box<Expr>, Expr);
-bridge_from!(PatOrExpr, Box<Expr>, MemberExpr);
-bridge_from!(PatOrExpr, Box<Expr>, SuperPropExpr);
 
 impl PatOrExpr {
     /// Returns the [Pat] if this is a pattern, otherwise returns [None].

crates/swc_ecma_ast/src/pat.rs

@@ -61,8 +61,20 @@ impl Take for Pat {
 
 bridge_pat_from!(BindingIdent, Ident);
 bridge_pat_from!(BindingIdent, Id);
-bridge_from!(crate::Param, crate::Pat, BindingIdent);
-bridge_from!(Box<crate::Pat>, crate::Pat, BindingIdent);
+
+macro_rules! pat_to_other {
+    ($T:ty) => {
+        bridge_from!(crate::Param, crate::Pat, $T);
+        bridge_from!(Box<crate::Pat>, crate::Pat, $T);
+        bridge_from!(crate::PatOrExpr, crate::Pat, $T);
+    };
+}
+
+pat_to_other!(BindingIdent);
+pat_to_other!(ArrayPat);
+pat_to_other!(ObjectPat);
+pat_to_other!(AssignPat);
+pat_to_other!(RestPat);
 
 #[ast_node("ArrayPattern")]
 #[derive(Eq, Hash, EqIgnoreSpan)]

crates/swc_ecma_utils/src/lib.rs

@@ -186,10 +186,16 @@ impl Visit for ArgumentsFinder {
     }
 }
 
-pub trait StmtOrModuleItem: Send + Sync {
+pub trait StmtOrModuleItem: Send + Sync + Sized {
     fn into_stmt(self) -> Result<Stmt, ModuleDecl>;
 
     fn as_stmt(&self) -> Result<&Stmt, &ModuleDecl>;
+
+    fn as_stmt_mut(&mut self) -> Result<&mut Stmt, &mut ModuleDecl>;
+
+    fn from_stmt(stmt: Stmt) -> Self;
+
+    fn try_from_module_decl(decl: ModuleDecl) -> Result<Self, ModuleDecl>;
 }
 
 impl StmtOrModuleItem for Stmt {
@@ -202,6 +208,21 @@ impl StmtOrModuleItem for Stmt {
     fn as_stmt(&self) -> Result<&Stmt, &ModuleDecl> {
         Ok(self)
     }
+
+    #[inline]
+    fn as_stmt_mut(&mut self) -> Result<&mut Stmt, &mut ModuleDecl> {
+        Ok(self)
+    }
+
+    #[inline]
+    fn from_stmt(stmt: Stmt) -> Self {
+        stmt
+    }
+
+    #[inline]
+    fn try_from_module_decl(decl: ModuleDecl) -> Result<Self, ModuleDecl> {
+        Err(decl)
+    }
 }
 
 impl StmtOrModuleItem for ModuleItem {
@@ -220,6 +241,24 @@ impl StmtOrModuleItem for ModuleItem {
             ModuleItem::Stmt(v) => Ok(v),
         }
     }
+
+    #[inline]
+    fn as_stmt_mut(&mut self) -> Result<&mut Stmt, &mut ModuleDecl> {
+        match self {
+            ModuleItem::ModuleDecl(v) => Err(v),
+            ModuleItem::Stmt(v) => Ok(v),
+        }
+    }
+
+    #[inline]
+    fn from_stmt(stmt: Stmt) -> Self {
+        ModuleItem::Stmt(stmt)
+    }
+
+    #[inline]
+    fn try_from_module_decl(decl: ModuleDecl) -> Result<Self, ModuleDecl> {
+        Ok(ModuleItem::ModuleDecl(decl))
+    }
 }
 
 pub trait ModuleItemLike: StmtLike {