On 01/10/13 16:26, Oren Ben-Kiki wrote:
Perhaps if the type system was smart enough to provide a default
implementation of the Default trait for everything that had the ToStr
trait, and allowing overrides for specific types?
I know that currently this sort of inference is not supported, but it
is intended that it would be possible in the future, right?
I think we should just replace ToStr and the #[deriving] with Default
and a default method .to_str() on that trait, since ToStr's current
design makes it very allocation-heavy (it has to allocate a new ~str for
each subfield, rather than just appending to a common buffer as using
the new format infrastructure would allow).
Also, not directly related to this exact discussion, but we could
probably cope with having fewer format specifiers, e.g. format!("{:b}",
true) could just be format!("{}", true), and similarly for `c`. (and
even `s` itself!)
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