Hello, this programm compile successfully with dmd but with gdc i get the following error message:

v_args1.d:6: template instance va_start!(char[]) va_start is not a template declaration, it is a function v_args1.d:6: function expected before (), not 'void'



import std.c.stdarg;

int foo(char[] x, ...) {

va_list ap; va_start!(typeof(x))(ap, x); printf("&x = %p, ap = %p\n", &x, ap); printf("%.*s\n",x);

int i; i = va_arg!(typeof(i))(ap); printf("i = %d\n", i); va_end(ap);

return i; }

int main() { int j;

j = foo("hello", 3); printf("j = %d\n", j);

return 0; }

nix wrote:
> Hello, this programm compile successfully with dmd but with gdc i get the following error message: 
> 
> v_args1.d:6: template instance va_start!(char[]) va_start is not a template declaration, it is a function v_args1.d:6: function expected before (), not 'void' 
> 
> 
> 
> import std.c.stdarg; 
> 
> int foo(char[] x, ...) { 
> 
> va_list ap; va_start!(typeof(x))(ap, x); printf("&x = %p, ap = %p\n", &x, ap); printf("%.*s\n",x); 
> 
> int i; i = va_arg!(typeof(i))(ap); printf("i = %d\n", i); va_end(ap); 
> 
> return i; } 
> 
> int main() { int j; 
> 
> j = foo("hello", 3); printf("j = %d\n", j); 
> 
> return 0; } 
> 
> 
> 

Argh, I didn't implement va_start correctly.  As a workaround, you can use "va_start(ap,x);"

Is foo supposed to be an "extern(C)" function?  If not, you can use the predefined variable "_argptr" and there is no need to call va_start.

David

Thank you for the quick answer

Manfred

David Friedman wrote:

> nix wrote:
>> Hello,
>> this programm compile successfully with dmd but with
>> gdc i get the following error message:
>> 
>> v_args1.d:6: template instance va_start!(char[]) va_start is not a
>> template declaration, it is a function
>> v_args1.d:6: function expected before (), not 'void'
>> 
>> 
>> 
>> import std.c.stdarg;
>> 
>> int foo(char[] x, ...) {
>> 
>> va_list ap;
>> va_start!(typeof(x))(ap, x);
>> printf("&x = %p, ap = %p\n", &x, ap);
>> printf("%.*s\n",x);
>> 
>> int i;
>> i = va_arg!(typeof(i))(ap);
>> printf("i = %d\n", i);
>> va_end(ap);
>> 
>> return i;
>> }
>> 
>> int main() {
>> int j;
>> 
>> j = foo("hello", 3);
>> printf("j = %d\n", j);
>> 
>> return 0;
>> }
>> 
>> 
>> 
> 
> Argh, I didn't implement va_start correctly.  As a workaround, you can
> use "va_start(ap,x);"
> 
> Is foo supposed to be an "extern(C)" function?  If not, you can use the predefined variable "_argptr" and there is no need to call va_start.
> 
> David