feat: support type-only named import and export specifiers

Author: dsherret

Cargo.toml

@@ -29,9 +29,9 @@ dprint-core = { version = "0.46.4", features = ["formatting"] }
 rustc-hash = "1.1.0"
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = { version = "1.0", optional = true }
-swc_ast_view = { version = "0.36.0", package = "dprint-swc-ecma-ast-view" }
-swc_common = "0.12.2"
-swc_ecmascript = { version = "0.64.0", features = ["parser"] }
+swc_ast_view = { version = "0.37.0", package = "dprint-swc-ecma-ast-view" }
+swc_common = "0.13.1"
+swc_ecmascript = { version = "0.68.0", features = ["parser"] }
 
 [dev-dependencies]
 debug-here = "0.2"

src/parsing/parser.rs

@@ -2656,6 +2656,10 @@ fn parse_yield_expr<'a>(node: &'a YieldExpr, context: &mut Context<'a>) -> Print
 fn parse_export_named_specifier<'a>(node: &'a ExportNamedSpecifier, context: &mut Context<'a>) -> PrintItems {
   let mut items = PrintItems::new();
 
+  if node.is_type_only() && !node.parent().type_only() {
+    items.push_str("type ");
+  }
+
   items.extend(parse_node(node.orig.into(), context));
   if let Some(exported) = node.exported {
     items.push_signal(Signal::SpaceOrNewLine);
@@ -2682,6 +2686,10 @@ fn parse_namespace_export_specifier<'a>(node: &'a ExportNamespaceSpecifier, cont
 fn parse_import_named_specifier<'a>(node: &'a ImportNamedSpecifier, context: &mut Context<'a>) -> PrintItems {
   let mut items = PrintItems::new();
 
+  if node.is_type_only() && !node.parent().type_only() {
+    items.push_str("type ");
+  }
+
   if let Some(imported) = node.imported {
     items.extend(parse_node(imported.into(), context));
     items.push_signal(Signal::SpaceOrNewLine);

tests/specs/declarations/export/ExportNamedDeclaration_All.txt

@@ -25,6 +25,14 @@ export   type    { test };
 [expect]
 export type { test };
 
+== should format a type only export specifiers ==
+export   {  type   n1 };
+export type{  type   n1 };
+
+[expect]
+export { type n1 };
+export type { n1 };
+
 == should format when has zero named exports ==
 export {} from "test";
 

tests/specs/declarations/import/ImportDeclaration_All.txt

@@ -48,6 +48,14 @@ import   type   { n1 } from "test";
 [expect]
 import type { n1 } from "test";
 
+== should format a type only import specifiers ==
+import   {  type   n1 } from "test";
+import type{  type   n1 } from "test";
+
+[expect]
+import { type n1 } from "test";
+import type { n1 } from "test";
+
 == should format when has zero named imports ==
 import {} from "test";