It's the macro G_VARIANT_TYPE_BYTESTRING itself that make the warning, you can
either edit the macro or simply add one that would not do the C cast:
(MyType)variable
which is not really safe and have better alternative for C++, since the type is
known a static_cast should be used instead:
static_cast<MyType>(variable)
#ifdef __cplusplus
#define G_VARIANT_TYPE_BYTESTRING (static_cast<const GVariantType
*>("ay"))
#else /* This is pure C implementation */
#define G_VARIANT_TYPE_BYTESTRING ((const GVariantType *) "ay")
#endif
Maybe this code is out of your reach (both usage and declaration and inside a
lib that cannot be modified), at which point you will have to disable the
warning at that particular place (sorry I don't known how to do this, since I
normally fix the lib and never leave warning alive).
-----Original Message-----
From: Damian Ivanov <damianator...@gmail.com>
Sent: August 20, 2019 10:17 AM
To: Jérôme Godbout <godbo...@amotus.ca>
Cc: interest@qt-project.org
Subject: Re: [Interest] old style cast
but this is about G_VARIANT_TYPE_BYTESTRING which is #defined in
gvarianttype.h as commented in the original message and casting this has no
effect:
static_cast<const GVariantType *>(G_VARIANT_TYPE_BYTESTRING)
On Tue, Aug 20, 2019 at 4:13 PM Jérôme Godbout <godbo...@amotus.ca> wrote:
>
> You should use static_cast instead of old C cast:
> ((const GVariantType *) "ay")
> should be
> static_cast<const GVariantType *>("ay")
>
>
> -----Original Message-----
> From: Interest <interest-boun...@qt-project.org> On Behalf Of Damian
> Ivanov
> Sent: August 20, 2019 5:51 AM
> To: interest@qt-project.org
> Subject: [Interest] old style cast
>
> Hello,
>
> What is the correct way to do the following so it doesn't warn about the use
> of old stylecast?
> //G_VARIANT_TYPE_BYTESTRING = is defined in gvarianttype.h
> // #define G_VARIANT_TYPE_BYTESTRING ((const GVariantType *) "ay")
> // value is of type GVariant *value
>
> if (g_variant_is_of_type(value, G_VARIANT_TYPE_BYTESTRING)) // warn:
> use of old style cast
>
> Thank you for suggestions.
>
> Regards,
> Damian
> _______________________________________________
> Interest mailing list
> Interest@qt-project.org
> https://lists.qt-project.org/listinfo/interest
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