Re: strange compiler warnings - can't get rid of them?
Re: strange compiler warnings - can't get rid of them?
- Subject: Re: strange compiler warnings - can't get rid of them?
- From: "Clark Cox" <email@hidden>
- Date: Tue, 27 Nov 2007 09:30:58 -0800
On Nov 27, 2007 8:52 AM, Jens Miltner <email@hidden> wrote:
> Hi,
>
> I have the following line in my source code:
>
>
> NSSize warningIconSize = NSMakeSize(iconSize.width * 0.75, iconSize.height *
> 0.75);
>
> This line triggers the following errors:
>
>
> warning: passing argument 1 of 'NSMakeSize' as 'float' rather than 'double'
> due to prototype
> warning: passing argument 2 of 'NSMakeSize' as 'float' rather than 'double'
> due to prototype
>
The warning is correct (you asked for -Wconversion after all). The
type of the expression (iconSize.width * 0.75) is double, and you are
converting it to a float by passing it to NSMakeSize.
-Wconversion largely exists to catch problems when going from K&R C
(where it was quite tricky to pass a 'float' argument) to ANSI/ISO C ,
and as such doesn't have much use in other situations.
You can either turn off the warning or use this instead:
NSSize warningIconSize = {iconSize.width * 0.75, iconSize.height * 0.75};
--
Clark S. Cox III
email@hidden
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