From 08eafe21d305e17c41b0221cae22dc1e90bee9cf Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 4 Oct 2019 14:42:01 +0900
Subject: Implement Ruby2.7's frozen strings from `Symbol#to_s`.

---
 mrbgems/mruby-symbol-ext/mrblib/symbol.rb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'mrbgems')

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