From a367373fe3e9fd405bb11b0eafb7b74865d884ad Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Sat, 16 Nov 2019 19:47:31 +0900
Subject: Revert "Implement Ruby2.7's frozen strings from `Symbol#to_s`"

This feature was reverted from Ruby 2.7.
---
 mrbgems/mruby-symbol-ext/mrblib/symbol.rb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'mrbgems/mruby-symbol-ext')

diff --git a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
index 4b4cf83fe..99fa275d5 100644
--- a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
+++ b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
@@ -10,7 +10,7 @@ class Symbol
   # Same as <code>sym.to_s.capitalize.intern</code>.
 
   def capitalize
-    self.to_s.capitalize.to_sym
+    (self.to_s.capitalize! || self).to_sym
   end
 
   ##
@@ -20,7 +20,7 @@ class Symbol
   # Same as <code>sym.to_s.downcase.intern</code>.
 
   def downcase
-    self.to_s.downcase.to_sym
+    (self.to_s.downcase! || self).to_sym
   end
 
   ##
@@ -30,7 +30,7 @@ class Symbol
   # Same as <code>sym.to_s.upcase.intern</code>.
 
   def upcase
-    self.to_s.upcase.to_sym
+    (self.to_s.upcase! || self).to_sym
   end
 
   ##
@@ -41,7 +41,7 @@ class Symbol
 
   def casecmp(other)
     return nil unless other.kind_of?(Symbol)
-    lhs =  self.to_s.upcase
+    lhs =  self.to_s; lhs.upcase!
     rhs = other.to_s.upcase
     lhs <=> rhs
   end
-- 
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