Hi all,
although this is a problem of the C standard, I still
find it annoying that the following code produces warnings
about incompatible pointer types (this has been discussed
before, see below):
extern void test(const double x[2][2]);
void foo(void)
{
double x[2][2];
const double (*y)[2] = x;
test(x);
}
Could we have an option to turn these warnings off?
Or, even better, have these warnings only with '-pedantic'?
I could try to come up with a patch...
This is not allowed because in C the qualifier always
belongs to the element type, and the allowed pointer
conversion rules do not include this case - which I assume
is an oversight of the standards committee.
Converting a pointer to an array to a pointer to a
constant array (i.e. an array with constant element type)
seems to be a perfectly reasonable and safe thing to do.
This is different from the case of converting a pointer
to a pointer, e.g. char** to const char** which is unsafe.
Martin
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47143
http://stackoverflow.com/questions/4573349/c-function-const-multidimensional-array-argument-strange-warning
http://gustedt.wordpress.com/2011/02/12/const-and-arrays/
