From: Kurt Stephens <ks@...>
Date: 2009-11-21T14:30:50+09:00
Subject: [ruby-core:26852] Internals: #to_s .vs. #to_str?

Is there a description of the semantic differences between #to_s and 
#to_str?  Are there any particular constraints on the results of these 
methods?  Is it considered "legal" to return frozen Strings in some 
cases for either of the two?   Is one used internal for implicit casts?

I have some ideas that may reduce GC work and improve large String 
concatenation.

I do remember a discussion about the differences between #to_a and 
#to_ary, but I don't quite remember why they are semantically different.

Thanks,
Kurt