From 3a85d0b12802e6ac6aeb2201c7ce0a3089be1e63 Mon Sep 17 00:00:00 2001
From: ksss <co000ri@gmail.com>
Date: Thu, 25 Dec 2025 10:47:06 +0900
Subject: [PATCH] Support selector for `String#strip` family.

---
 core/string.rbs            | 12 +++++------
 test/stdlib/String_test.rb | 42 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 6 deletions(-)

diff --git a/core/string.rbs b/core/string.rbs
index 869ef864e..59d3122d4 100644
--- a/core/string.rbs
+++ b/core/string.rbs
@@ -3670,7 +3670,7 @@ class String
   # Related: see [Converting to New
   # String](rdoc-ref:String@Converting+to+New+String).
   #
-  def lstrip: () -> String
+  def lstrip: (*selector) -> String
 
   # <!--
   #   rdoc-file=string.c
@@ -3683,7 +3683,7 @@ class String
   #
   # Related: see [Modifying](rdoc-ref:String@Modifying).
   #
-  def lstrip!: () -> self?
+  def lstrip!: (*selector) -> self?
 
   # <!--
   #   rdoc-file=string.c
@@ -4195,7 +4195,7 @@ class String
   # Related: see [Converting to New
   # String](rdoc-ref:String@Converting+to+New+String).
   #
-  def rstrip: () -> String
+  def rstrip: (*selector) -> String
 
   # <!--
   #   rdoc-file=string.c
@@ -4208,7 +4208,7 @@ class String
   #
   # Related: see [Modifying](rdoc-ref:String@Modifying).
   #
-  def rstrip!: () -> self?
+  def rstrip!: (*selector) -> self?
 
   # <!--
   #   rdoc-file=string.c
@@ -4681,7 +4681,7 @@ class String
   # Related: see [Converting to New
   # String](rdoc-ref:String@Converting+to+New+String).
   #
-  def strip: () -> String
+  def strip: (*selector) -> String
 
   # <!--
   #   rdoc-file=string.c
@@ -4694,7 +4694,7 @@ class String
   #
   # Related: see [Modifying](rdoc-ref:String@Modifying).
   #
-  def strip!: () -> self?
+  def strip!: (*selector) -> self?
 
   # <!--
   #   rdoc-file=string.c
diff --git a/test/stdlib/String_test.rb b/test/stdlib/String_test.rb
index 4e02c6be9..c9b69f696 100644
--- a/test/stdlib/String_test.rb
+++ b/test/stdlib/String_test.rb
@@ -1099,6 +1099,13 @@ def test_lstrip
                       ' hello', :lstrip
     assert_send_type  '() -> String',
                       'hello', :lstrip
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type  '(String::selector) -> String',
+                          "01234abc56789", :lstrip, selector
+      end
+    end
   end
 
   def test_lstrip!
@@ -1106,6 +1113,13 @@ def test_lstrip!
                       +' hello', :lstrip!
     assert_send_type  '() -> nil',
                       +'hello', :lstrip!
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type  '(String::selector) -> String',
+                          "01234abc56789", :lstrip!, selector
+      end
+    end
   end
 
   def test_match
@@ -1252,6 +1266,13 @@ def test_rstrip
                       'hello ', :rstrip
     assert_send_type  '() -> String',
                       'hello', :rstrip
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type '(String::selector) -> String',
+                         "01234abc56789", :rstrip, selector
+      end
+    end
   end
 
   def test_rstrip!
@@ -1259,6 +1280,13 @@ def test_rstrip!
                       +'hello ', :rstrip!
     assert_send_type  '() -> nil',
                       +'hello', :rstrip!
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type '(String::selector) -> String',
+                         "01234abc56789", :rstrip!, selector
+      end
+    end
   end
 
   def test_scan
@@ -1491,6 +1519,13 @@ def test_strip
                       ' hello ', :strip
     assert_send_type  '() -> String',
                       'hello', :strip
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type '(String::selector) -> String',
+                         "01234abc56789", :strip, selector
+      end
+    end
   end
 
   def test_strip!
@@ -1498,6 +1533,13 @@ def test_strip!
                       ' hello ', :strip!
     assert_send_type  '() -> nil',
                       'hello', :strip!
+
+    if_ruby("4.0"...) do
+      with_string "0-9" do |selector|
+        assert_send_type '(String::selector) -> String',
+                         "01234abc56789", :strip!, selector
+      end
+    end
   end
 
   def test_sub