try/catch idiom in std.datetime

[Jesse Phillips]

On Thursday, 21 November 2013 at 07:44:44 UTC, Jonathan M Davis 
wrote:
> As I understand it, when Walter is talking about a validator 
> function, _all_
> it does is validate the input. It doesn't operate on the data 
> beyond doing validation

I doubt Walter first checks that a file is a valid D program 
before tokenizing. More importantly he probably would not go for 
such a change.

The thing is, ISO String isn't a date, we first need to create a 
date and in doing so we validate it is valid and never have to 
check again.