On Friday, 1 April 2016 at 21:25:46 UTC, Yuxuan Shui wrote:
Clang has this nice feature that it will warn you when you
passed wrong arguments to printf:
#include <stdio.h>
int main(){
long long u = 10;
printf("%c", u);
}
clang something.c:
something.c:4:15: warning: format specifies type 'int' but the
argument has type 'long long' [-Wformat]
With the CTFE power of D, we should be able to do the same
thing when the format string is available at compile time.
Instead of throwing exceptions at run time.
Not as-is, because the format string is a runtime argument and
not a compile-time constant.
Consider:
writefln(rand() >= 0.5 ? "%s" : "%d", 123);
It's certainly possible with a new, templated writef function.
Hypothetically:
writefln_ctfe!"%s"(1234); // would fail
