[Ironruby-core] Code Review: NewSingletons3

[Curt Hagenlocher]

Looks good.

-----Original Message-----
From: Tomas Matousek 
Sent: Saturday, June 06, 2009 9:14 PM
To: IronRuby External Code Reviewers
Cc: ironruby-core at rubyforge.org
Subject: Code Review: NewSingletons3

  tfpt review "/shelveset:NewSingletons3;REDMOND\tomat"
  
  Initial work to improve singletons.
  
  *	Improves reflection cache generator - it searches IronRuby.dll for all types marked by [ReflectionCache] attribute and generates ref-cache entries for all their methods and properties marked with [Emitted] attribute.
  *	Merges RubyModule.Subclass into RubyModule, i.e. RubyModule now implements IRubyObject.
  *	IRubyObjects now hold on their immediate class (not nominal class) and that reference might change once from a non-singleton to a singleton class.
  This change allows IRubyObject singletons (including modules and classes when used in static method calls) to have the same rules as non-singleton objects. The rule no longer needs to hold on such objects.
  *	Implements module freezing: methods, constants, instance and class variables, mixins cannot be modified on a frozen module. Besides, if an object is frozen its singleton class is (recursively) frozen as well. 
  *	Fixes object freezing: instance variables cannot be modified on a frozen object (we allowed it).

Tomas