gnuplot-beta

Advice in C code

[V. <gae...@no...>]

    Hello all,

    I've been working a bit on the povray terminal (I am very slow
but it has finally made some progress).

    I have a question to which I have not been able to find local advice
on :

    Is the syntax :

    current_color =3D (rgb_color){0, 0, 0};

    Standard and portable. It compiles with gcc 3.3.5 but I do not know
if it is standard C.

    Thank you

--
    Ga=EBl

Re: Advice in C code

[Hans-Bernhard B. <br...@ph...>]

Ga=EBl Varoquaux wrote:
>     Is the syntax :
>=20
>     current_color =3D (rgb_color){0, 0, 0};
>=20
>     Standard and portable.=20

Yes and no.  It's a GCC extension (--> see

	info gcc "C Extensions" compound

) that was adopted into C99. C99 is formally "the standard" since its
ratification, but it's an almost purely hypothetical thing in praxis.

 > It compiles with gcc 3.3.5 but I do not know
> if it is standard C.

It's not.  You'll notice if you tell GCC to disable extensions (-ansi=20
-pedantic, plus some -D flags to re-enable usual functionality of the C=20
library).