From: GOTO Kentaro <gotoken@...>
Date: 2002-10-02T11:31:59+09:00
Subject: Re: thoughts on typelessness

At Wed, 2 Oct 2002 10:58:08 +0900,
Paul Brannan wrote:
> But in my mind, this is still an explicit conversion, because String#%
> explicitly calls to_s().

I don't think that is explicit conversion because we couldn't know
which method would be called.  For example, I was surprised by 

  % ruby -e 'class A; def to_int() 10 end end; p("%o" % A.new)' 
  "12"
  % ruby17 -e 'class A; def to_int() 10 end end; p("%o" % A.new)' 
  "12"
  % ruby17 -e 'class A; def to_i() 10 end end; p("%o" % A.new)' 
  "12"
  % ruby17 -e 'class A; def to_i() 10 end; def to_int() 0 end end; p("%o" % A.new)' 
  "0"
  % ruby -e 'class A; def to_i() 10 end end; p("%o" % A.new)' 
  -e:1:in `%': failed to convert A into Integer (TypeError)
          from -e:1


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