Cleverness of the compiler

[Shammah Chancellor]

On 2013-11-25 00:08:50 +0000, Namespace said:

> I love this feature, but I'm unsure how it works. Can someone explain 
> me, how the compiler deduce that he should read 4 bytes for each index 
> (the 'at' function)? The type is void*, not int*.

It doesn't work.  That code is buggy.  It's overwriting previous 
elements with new ones.   Indexing a void* only moves up by 1 byte.

void main() {
  pragma(msg, void.sizeof)
	Tarray arr;
	arr.push(42);
	int a;
	arr.at(0, &a);
	writeln(a, "::", arr.length, "::", arr.capacity);
	arr.push(23);
	arr.at(1, &a);
	writeln(a, "::", arr.length, "::", arr.capacity);
	arr.push(1337);
	arr.at(2, &a);
	writeln(a, "::", arr.length, "::", arr.capacity);
  writeln(arr.capacity);
	arr.push(ushort.max); //Write a ushort to test.
	arr.at(3, &a); //Only works because we're on a little endian platform
	writeln(a, "::", arr.length, "::", arr.capacity);
	arr.at(2, &a);
	writeln(a, "::", arr.length, "::", arr.capacity);
}