On 29/07/13 14:49, Felipe Magno de Almeida wrote:
> On Tue, Jul 23, 2013 at 12:01 PM, Gustavo Sverzut Barbieri
> <barbi...@profusion.mobi> wrote:
>
> [snip]
>
>> the con I could see is we loose validation in the caller, you'd need
>> to validate in the function... Example:
>> eo_do(evas_obj, ecore_timer_interval_set(10.0));
>> this would still call directly ecore_timer_interval_set(), which
>> internally would get the eo_o, which should be validated and return if
>> not right. All in all that would be the case, as
>> ecore_timer_interval_set() would need to get the actual method
>> (virtual) to call.
>
> Just an idea that might be expanded. What if you change the syntax a bit to:
>
> eo_do(obj
> , x = eo_call(ecore_foo) (10.0)
> );
>
> This way we can hijack the arguments and the function name in
> preprocessor-time using:
>
> #define EO_FUNCTION_ARGS(...) (__eo_obj, ##__VA_ARGS__) };
> #define eo_call(F) { F EO_FUNCTION_ARGS
>
> #define eo_do( OBJ, ...) \
> do \
> { \
> void* __eo_obj = OBJ; \
> __VA_ARGS__ \
> } \
> while(0) \
>
> int ecore_foo(void*, double)
> {
> return 5;
> }
>
> int main()
> {
> void* obj;
> int x;
> eo_do(obj
> , x = eo_call(ecore_foo) (10.0)
> );
> }
>
> A few problems: get the function's signature in C so the virtual
> method to call can be get and be callable with the arguments
> preprocessed; the function name and its arguments must be expanded in
> order; it uses the GNU extension of statement expressions.
The problem with this, and with eo_call in general is the lack of
support for editor auto-completion, which I see as a must.
--
Tom.
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