From 5c4c00123d16b0d26e078e8dee9d529e9c99ea4d Mon Sep 17 00:00:00 2001
From: Boshen <1430279+Boshen@users.noreply.github.com>
Date: Wed, 28 Aug 2024 15:30:38 +0000
Subject: [PATCH] fix(codegen): print `export @decorator declare abstract class
 Foo` correctly (#5303)

---
 crates/oxc_codegen/src/gen.rs                        | 12 ++++++------
 .../oxc_codegen/tests/integration/snapshots/ts.snap  |  3 +++
 crates/oxc_codegen/tests/integration/ts.rs           |  1 +
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/crates/oxc_codegen/src/gen.rs b/crates/oxc_codegen/src/gen.rs
index 03f390a9e95ec..7d5aee94b09d6 100644
--- a/crates/oxc_codegen/src/gen.rs
+++ b/crates/oxc_codegen/src/gen.rs
@@ -2158,16 +2158,16 @@ impl<'a> Gen for MetaProperty<'a> {
 impl<'a> Gen for Class<'a> {
     fn gen(&self, p: &mut Codegen, ctx: Context) {
         p.add_source_mapping(self.span.start);
-        if self.declare {
-            p.print_str("declare ");
-        }
-        if self.r#abstract {
-            p.print_str("abstract ");
-        }
         let n = p.code_len();
         let wrap = self.is_expression() && (p.start_of_stmt == n || p.start_of_default_export == n);
         p.wrap(wrap, |p| {
             self.decorators.gen(p, ctx);
+            if self.declare {
+                p.print_str("declare ");
+            }
+            if self.r#abstract {
+                p.print_str("abstract ");
+            }
             p.print_str("class");
             if let Some(id) = &self.id {
                 p.print_hard_space();
diff --git a/crates/oxc_codegen/tests/integration/snapshots/ts.snap b/crates/oxc_codegen/tests/integration/snapshots/ts.snap
index a4eaa09690546..5584266fafe65 100644
--- a/crates/oxc_codegen/tests/integration/snapshots/ts.snap
+++ b/crates/oxc_codegen/tests/integration/snapshots/ts.snap
@@ -106,3 +106,6 @@ c = foo<string>;
 
 d = x satisfies y;
 d = ((x) satisfies y);
+
+export @x declare abstract class C {}
+export @x declare abstract class C {}
diff --git a/crates/oxc_codegen/tests/integration/ts.rs b/crates/oxc_codegen/tests/integration/ts.rs
index 326e0da8efc09..7944aae11295a 100644
--- a/crates/oxc_codegen/tests/integration/ts.rs
+++ b/crates/oxc_codegen/tests/integration/ts.rs
@@ -50,6 +50,7 @@ fn ts() {
         "b = (x as y);",
         "c = foo<string>;",
         "d = x satisfies y;",
+        "export @x declare abstract class C {}",
     ];
 
     let snapshot = cases.into_iter().fold(String::new(), |mut w, case| {