Reading and converting binary file 2 bits at a time

[Gary Willoughby via Digitalmars-d-learn]

On Saturday, 29 August 2015 at 21:50:12 UTC, Mike James wrote:
> On Saturday, 29 August 2015 at 20:15:53 UTC, Marc Schütz wrote:
>> Just cast to `Crumbs[]` directly:
>>
>>     import std.bitmanip;
>>     import std.stdio;
>>     import std.file;
>>
>>     struct Crumbs {
>>         mixin(bitfields!(
>>             ubyte, "one",   2,
>>             ubyte, "two",   2,
>>             ubyte, "three", 2,
>>             ubyte, "four",  2
>>         ));
>>     }
>>
>>     void main(string[] argv)
>>     {
>>         auto raw = read("binaryfile");
>>         auto buffer = cast(Crumbs[]) raw;
>>
>>         foreach (cmb; buffer) {
>>             writefln("Crumb one:   %s", cmb.one);
>>             writefln("Crumb two:   %s", cmb.two);
>>             writefln("Crumb three: %s", cmb.three);
>>             writefln("Crumb four:  %s", cmb.four);
>>         }
>>     }
>
> I like that :-)

But it might not be safe: 
http://forum.dlang.org/thread/ztefzijqhwrouzlagrpq@forum.dlang.org