Cool pattern or tragic?

[Guillaume Piolat]

The idea is to deliberately mark @system functions that need 
special scrutiny to use, regardless of their memory-safety. 
Function that would typically be named `assumeXXX`.



```d
class MyEncodedThing
{
     Encoding encoding;

     /// Unsafe cast of encoding.
     void assumeEncoding (Encoding encoding) /* here */ @system /* 
here */
     {
         this.encoding = encoding;
     }
}

char* assumeZeroTerminated(char[] str) @system
{
     return str.ptr;
}

```

That way, @safe code will still need to manually @trust them.