Refactor `mruby-catch`; ref #5328

- Move `#catch` definition to `mruby-catch.c` to avoid tweaking
- Remove `#__preserve_catch_method`
- Implement whole `#throw` method in C

1 files changed, 0 insertions, 14 deletions

diff --git a/mrbgems/mruby-catch/mrblib/catch.rb b/mrbgems/mruby-catch/mrblib/catch.rb
index c69cd125e..8e5f59023 100644
--- a/mrbgems/mruby-catch/mrblib/catch.rb
+++ b/mrbgems/mruby-catch/mrblib/catch.rb
@@ -6,17 +6,3 @@ class UncaughtThrowError < ArgumentError
     super("uncaught throw #{tag.inspect}")
   end
 end
-
-module Kernel
-  def catch(tag=Object.new, &block)
-    # A double closure is required to make the nested `catch` distinguishable
-    # and because `break` goes back to `proc->upper`.
-    -> { -> { block.call(tag) }.call }.call
-  end
-  def throw(tag, val=nil)
-    __throw(tag, val)
-    raise UncaughtThrowError.new(tag, val)
-  end
-
-  __preserve_catch_method
-end