From dc315cac89eb12a09d0a7dc4acf1f24b4d3e30a2 Mon Sep 17 00:00:00 2001
From: ksss <co000ri@gmail.com>
Date: Mon, 19 Oct 2026 14:51:56 +0900
Subject: [PATCH] Write annotations of constant, global, and class/module alias
 decls

`RBS::Writer#write_decl` did not call `write_annotation` for
`Constant`, `Global`, `ClassAlias`, and `ModuleAlias`, so `%a{...}`
on those declarations disappeared from the output. The annotations
were added to these AST nodes in 6f8d0f34, 1bc9bb4b, and 075d27c8,
but the writer was not updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 lib/rbs/writer.rb       |  4 ++++
 test/rbs/writer_test.rb | 31 +++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/lib/rbs/writer.rb b/lib/rbs/writer.rb
index 4d2a1d0d21..89f4f9d6d0 100644
--- a/lib/rbs/writer.rb
+++ b/lib/rbs/writer.rb
@@ -159,10 +159,12 @@ def write_decl(decl)
         puts "end"
       when AST::Declarations::Constant
         write_comment decl.comment
+        write_annotation decl.annotations
         puts "#{decl.name}: #{decl.type}"
 
       when AST::Declarations::Global
         write_comment decl.comment
+        write_annotation decl.annotations
         puts "#{decl.name}: #{decl.type}"
 
       when AST::Declarations::TypeAlias
@@ -174,12 +176,14 @@ def write_decl(decl)
 
       when AST::Declarations::ClassAlias
         write_comment decl.comment
+        write_annotation decl.annotations
         write_loc_source(decl) {
           puts "class #{decl.new_name} = #{decl.old_name}"
         }
 
       when AST::Declarations::ModuleAlias
         write_comment decl.comment
+        write_annotation decl.annotations
         write_loc_source(decl) {
           puts "module #{decl.new_name} = #{decl.old_name}"
         }
diff --git a/test/rbs/writer_test.rb b/test/rbs/writer_test.rb
index 44b4c3570d..225f1905ca 100644
--- a/test/rbs/writer_test.rb
+++ b/test/rbs/writer_test.rb
@@ -41,6 +41,37 @@ module C = D
     SIG
   end
 
+  def test_annotated_decl
+    assert_writer <<-SIG
+%a{deprecated}
+FOO: Integer
+
+%a{deprecated}
+$foo: Integer
+
+# Alias of B.
+%a{deprecated}
+class A = B
+
+# Alias of D.
+%a{deprecated}
+module C = D
+
+module Foo
+  %a{deprecated}
+  FOO: Integer
+
+  # Alias of B.
+  %a{deprecated}
+  class A = B
+
+  # Alias of D.
+  %a{deprecated}
+  module C = D
+end
+    SIG
+  end
+
   def test_class_decl
     assert_writer <<-SIG
 class Foo::Bar[X] < Array[String]