malloc/free wrappers for classes

gistfile1.d

import core.exception : onOutOfMemoryError;
import core.stdc.stdlib : malloc, free;
import std.conv : emplace;

T alloc(T, Args...)(auto ref Args args) if(is(T == class))
{
	enum size = __traits(classInstanceSize, T);

	if(auto p = malloc(size))
	{
		scope(failure) free(p);
		return emplace!T(p[0 .. size], args);
	}
	else
		onOutOfMemoryError();
}

void dealloc(T)(ref T obj) if(is(T == class))
{
	scope(exit)
	{
		free(cast(void*)obj);
		obj = null;	
	}

	destroy(obj);
}