Re: [boost] [convert] Default Syntax Idea

Subject: Re: [boost] [convert] Default Syntax Idea
From: Gevorg Voskanyan (v_gevorg_at_[hidden])
Date: 2009-02-25 09:58:54

Stewart, Robert wrote:

[snip]

> To avoid the precedence problem, the available operators that make any sense at 
> all are:
> 
>    convert(s)[5] >> std::hex;
>    convert(s) ! 5 >> std::hex;
>    convert(s) ~ 5 >> std::hex;
>    convert(s) & 5 >> std::hex;
>    convert(s) / 5 >> std::hex;
>    convert(s) % 5 >> std::hex;
> 
> The subscript operator is not bad.  "[5]" implies that 5 is optional in a number 
> of contexts.  Bang suggests using 5 on error.  Tilde doesn't evoke "default" in 
> any way, but it also doesn't look like an egregious misuse of the operator.  The 
> final three just look wrong to me.
> 
> Given that the default value calls should be easy to get right and that the 
> precedence issue will bite many, we should select a different operator if we 
> choose to retain an operator for the job.  Among the available choices, I favor 
> bang:
> 
>    convert(s) ! 5 >> std::hex;

How is that? Both ! and ~ were unary operators last time I checked :)

Best Regards,
Gevorg