1 files changed, 39 insertions, 0 deletions
diff --git a/mrblib/error.rb b/mrblib/error.rb
index 5d49ec1e4..16e88eefb 100644
--- a/mrblib/error.rb
+++ b/mrblib/error.rb
@@ -13,6 +13,44 @@ class Exception
   end
 end
 
+# ISO 15.2.24
+class ArgumentError < StandardError
+end
+
+# ISO 15.2.25
+class LocalJumpError < StandardError
+end
+
+# ISO 15.2.26
+class RangeError < StandardError
+end
+
+class FloatDomainError < RangeError
+end
+
+# ISO 15.2.26
+class RegexpError < StandardError
+end
+
+# ISO 15.2.29
+class TypeError < StandardError
+end
+
+# ISO 15.2.31
+class NameError < StandardError
+end
+
+# ISO 15.2.32
+class NoMethodError < NameError
+end
+
+# ISO 15.2.33
+class IndexError < StandardError
+end
+
+class KeyError < IndexError
+end
+
 # ISO 15.2.37
 class ScriptError < Exception
 end
@@ -23,3 +61,4 @@ end
 
 class NotImplementedError < ScriptError
 end
+