Understanding Safety of Function Pointers vs. Addresses of Functions

[jmh530 via Digitalmars-d-learn]

On Wednesday, 8 July 2015 at 14:37:23 UTC, jmh530 wrote:
> Thanks. I was worried I was doing something wrong.

It seems like if you wrap the intrinsic function in another 
function than it works fine (below). Easy enough work-around, I 
suppose.

If there is no intention to fix the pointer to assembly function 
issue (I have zero clue how to go about it, maybe there is a good 
reason it can't be fixed), this work-around could be implemented 
in the std.math library for those functions. I.e., put the 
assembly code in separate functions and then have the existing 
intrinsic functions act as wrappers to those.

import std.math : cos;

real cos_wrap(real x) pure nothrow @nogc @safe
{
	return cos(x);
}

void main()
{
	auto fp = &cos_wrap;
	real x = 0;
	real y = fp(x);
}