Re: [boost] [constrained_value] default initialization

Subject: Re: [boost] [constrained_value] default initialization
From: Robert Kawulak (robert.kawulak_at_[hidden])
Date: 2008-12-07 12:56:25

Hi Jeff,
 
> I couldn't find mention of what is the initial value of
> 
> bounded_int<int, 123, 456>::type some_var;
> 
> I assume it follows the rules for an int?

Default construction always causes the underlying value to be value-initialised,
so it'll be 0. Since 0 is not within the allowed range, the error policy will be
invoked throwing an exception.

> The Simple constrained objects examples says the following is legal:
> 
> even_int a;
> 
> What about:
> 
> odd_int b;

Same as above -- the underlying value will be 0 and the error policy will be
invoked.

Best regards,
Robert