From eba4b1fd76ae22efc23341f028deb924fdc9401c Mon Sep 17 00:00:00 2001 From: ksss Date: Sun, 5 Mar 2017 22:57:56 +0900 Subject: Check modifiable for String `bang' methods --- mrblib/string.rb | 2 ++ 1 file changed, 2 insertions(+) (limited to 'mrblib') diff --git a/mrblib/string.rb b/mrblib/string.rb index aa2ca9973..b13cfd69a 100644 --- a/mrblib/string.rb +++ b/mrblib/string.rb @@ -78,6 +78,7 @@ class String # # ISO 15.2.10.5.19 def gsub!(*args, &block) + raise RuntimeError, "can't modify frozen String" if frozen? str = self.gsub(*args, &block) return nil if str == self self.replace(str) @@ -123,6 +124,7 @@ class String # # ISO 15.2.10.5.37 def sub!(*args, &block) + raise RuntimeError, "can't modify frozen String" if frozen? str = self.sub(*args, &block) return nil if str == self self.replace(str) -- cgit v1.2.3