Hi,
On Sun, 21 Jul 2019, Ivan Medoedov wrote:
Typo:
Foo* foo = ALLOC_INIT(Foo, { .field = 123, .field2 = 456 });
Next time, please be specific in your bug reports, it should contain a
self-contained example of the problem you're seeing. With the info
available I constructed the example below, and it works just fine.
Then I realized that maybe you indeed mean GNU designated initializers and
the runtime behaviour instead of not being able to compile something. I
was able to generate a segfault at runtime when using the GNU form (i.e.
'{ foo: val }'). That's now fixed in mob.
% cat alloc-init.c
typedef __SIZE_TYPE__ size_t;
struct S {
int a, b;
};
extern void * malloc(size_t);
extern void * memcpy(void *, const void *, size_t);
extern int printf(const char *, ...);
void *memdup(const void *src, size_t sz);
#define ALLOC_INIT(type, ...) \
(type *)memdup((type[]){ __VA_ARGS__ }, sizeof(type))
int main()
{
struct S *ps = ALLOC_INIT(struct S, {.a = 3, .b = 4});
printf("%d %d\n", ps->a, ps->b);
return 0;
}
void *memdup(const void *src, size_t sz) {
void *mem = malloc(sz);
return mem ? memcpy(mem, src, sz) : 0;
}
Ciao,
Michael.
On Sun, Jul 21, 2019 at 7:56 PM Ivan Medoedov <ivan.medoe...@gmail.com>
wrote:
Indeed. Sorry, my bad.
Looks like the error is caused by __VA_ARGS__
I'm using the following macro:
#define ALLOC_INIT(type, ...) (type *)memdup((type[]){ __VA_ARGS__ },
sizeof(type))
https://tia.mat.br/posts/2015/05/01/initializing_a_heap_allocated_structure
_in_c.html
Foo* foo = ALLOC_INIT(Foo, { field: 123, field2: 456 });
error: field expected
This macro works fine with GCC and Clang.
On Sun, Jul 21, 2019 at 6:50 PM Michael Matz <matz....@frakked.de>
wrote:
Hi,
On Sun, 21 Jul 2019, Ivan Medoedov wrote:
> Hello,
> { .field = value } syntax is not supported by TCC.
Why do you think so?
% cat designated-init.c
struct S {
int a, b;
};
struct S s = {.a = 2, .b = 3};
% ./tcc -c designated-init.c && echo ok
ok
%
Ciao,
Michael.
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