class SymbolException < Exception
　attr_reader :sym
　def initialize(sym)
　　@sym = sym
　end
end

class Symbol
　alias old_match ===
　def ===(obj)
　　return old_match(obj) unless SymbolException === obj
　　obj.sym == self
　end
end

def raise(*args)
　Kernel.raise *args unless args.length == 1 && Symbol === args[0]
　raise SymbolException.new(args[0])
end



begin
　raise :hoge
rescue :fuga
　p "fuga"
rescue :hoge
　p "hoge"
end

こんなの実装できるとかRuby変態だろ…