From 27398b04967e131be6f8c28cdaee38bafbfed7e3 Mon Sep 17 00:00:00 2001
From: ksss <co000ri@gmail.com>
Date: Wed, 10 Dec 2025 10:38:13 +0900
Subject: [PATCH] Add signature for `OptionParser#raise_unknown`

---
 stdlib/optparse/0/optparse.rbs   | 5 +++++
 test/stdlib/OptionParser_test.rb | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/stdlib/optparse/0/optparse.rbs b/stdlib/optparse/0/optparse.rbs
index 2e1ab967a..b973ac8c3 100644
--- a/stdlib/optparse/0/optparse.rbs
+++ b/stdlib/optparse/0/optparse.rbs
@@ -825,6 +825,11 @@ class OptionParser
   #
   attr_accessor program_name: String
 
+  # <!-- rdoc-file=lib/optparse.rb -->
+  # Whether to raise at unknown option.
+  #
+  attr_accessor raise_unknown: boolish
+
   # <!--
   #   rdoc-file=lib/optparse.rb
   #   - reject(*args, &blk)
diff --git a/test/stdlib/OptionParser_test.rb b/test/stdlib/OptionParser_test.rb
index 290c15d15..30378075e 100644
--- a/test/stdlib/OptionParser_test.rb
+++ b/test/stdlib/OptionParser_test.rb
@@ -201,6 +201,14 @@ def test_program_name=
     assert_send_type "(String) -> String", opt, :program_name=, 'foo'
   end
 
+  def test_raise_unknown
+    assert_send_type "() -> boolish", opt, :raise_unknown
+  end
+
+  def test_raise_unknown=
+    assert_send_type "(boolish) -> boolish", opt, :raise_unknown=, true
+  end
+
   def test_reject
     assert_send_type '(Class) -> void', opt, :reject, Class.new
   end