@trust is an encapsulation method, not an escape

[Kagamin via Digitalmars-d]

On Friday, 6 February 2015 at 08:58:05 UTC, Walter Bright wrote:
> On 2/6/2015 12:31 AM, Kagamin wrote:
>> On Thursday, 5 February 2015 at 23:39:39 UTC, Walter Bright 
>> wrote:
>>>  static void trustedMemcopy(T[] dest, T[] src) @trusted
>>>  {
>>>    assert(src.length == dest.length);
>>>    memcpy(dest.ptr, src.ptr, src.length * T.sizeof);
>>>  }
>>
>> Should be enforce: assert doesn't guard against malicious 
>> usage.
>
> Cue my endless attempts to explain the difference between input 
> errors and logic errors :-(

Well, ok, not enforce:

static void trustedMemcopy(T[] dest, T[] src) @trusted
{
   if(src.length != dest.length)assert(false);
   memcpy(dest.ptr, src.ptr, src.length * T.sizeof);
}