try/catch idiom in std.datetime

[Dicebot]

On Wednesday, 20 November 2013 at 23:57:40 UTC, Andrei 
Alexandrescu wrote:
> No, because the quantity being measured is "worse".
>
> Andrei

If it would have been an inherent well-defined trait of an object 
itself, it would have been objective comparison. As this quantity 
is defined purely (and no real measurable traits other than 
consistency were proposed) by observing subject, it can't be an 
objective measurement and this objective comparison.

Objective comparison is something like comparing average amount 
of extra symbols per lexer token between two code styles.