Re: designated inits

[Andi Hellmund <mail at andihellmund dot com>]

todd freed wrote:
> Referring to section 5.21 of the docs - Designated Initializers
>
> typedef struct
> {
>    int a;
>    int b;
> } foo;
>
> Is there a way I can get this effect
>
> foo myfoo = { .a = 0, .b = 0 };
>
> without specifying each field? I just want the whole structure
> initialized to zero.

You could do this:

foo myfoo = {0};

which means that the first member is explicitly initialized to zero and 
the remaining members are implicitly initialized, also zero.


> foo myfoo;
>
> then I get 'use of uninitialized value' errors in valgrind.

Depending on where you define 'myfoo', this error might be correct. If 
the definition is function-local, then the error is correct, otherwise - 
if defined in the global scope - the members are implicitly initialized 
to zero.

Andi