From: Sebastian Krause <skra@...>
Date: 2011-01-19T00:52:38+09:00
Subject: class context

I thought that the block in the `class_exec`-method would be executed as 
if it appeared within
a class definition. That seems naive as I discovered the following.

Why does an error occur here?

----
irb(main):001:0> RUBY_VERSION
=> "1.9.2"
irb(main):002:0> class C1; Const = 42; end
=> 42
irb(main):003:0> class C1; p Const; end
42
=> 42
irb(main):004:0> C1.class_exec { p Const }
NameError: uninitialized constant Class::Const
     from (irb):4:in `block in irb_binding'
     from (irb):4:in `class_exec'
     from (irb):4
     from /usr/bin/irb:12:in `<main>'
irb(main):005:0> C1.class_eval "p Const"       # furthermore this
42
=> 42

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Regards
Sebastian