mwarning wrote:
Hi,
I try to pass a static array to a variadic C function.
Looks like the array is passed by values as expected,
but the length and pointer are prepended, too.
Is this intentional or a bug?
http://pastebin.com/6ejFF37j
Fixed sized arrays don't have ptr and length members:
import std.stdio;
void main()
{
int[5] array;
writeln(array.sizeof); // prints 20
writeln(array.ptr, ' ', &array); // prints the save value
}
The code you've pasted has this:
extern(C) void* foo(uint x, ...)
{
Stdout("x: ")(x).nl;
Stdout("y: ")(*(&x + 1)).nl; //outputs 64!
return null;
}
The expression *(&x + 1) is undefined behavior, because (&x + 1) is not
valid, i.e. not specified to be accessible by the language.
Ali
