assert(condition[, message]) patch

[BCS]

In article <e5ki8s$jfc$1 at digitaldaemon.com>, Walter Bright says...
>
>braddr at puremagic.com wrote:
>> I have been toying with D to bring myself up to speed and I found myself writing
>> a lot of unit tests, always a good thing.  In those unit tests I found myself
>> writing a lot of blocks like:
>> 
>> if (cond)
>> {
>> writefln("some debugging output to make my life easier");
>> assert(false);
>> }
>> 
>> I know many don't like unit tests to have output, but I do.
>
>Why not:
>
>	assert(!cond); // some debugging output to make my life easier
>
>? You'll need to go look at the source anyway when the assert trips, so 
>what advantage is there to print the comment?

a little run time info could be realy helpfull.

#   assert(str.length < 5, `the string "` ~ str ~ `" is more than 5 char long`);

or in the case someone was talking about (MMX stuff)


..

char[] assertMsg
assert(compArray(c,d,assertMsg), assertMsg);

..

bool compArray(int[] a, int[] b, inout char[] msg)
{
if(a==b) return true;

if(a.length != b.length)
{
msg = "Unequal length";
return false;
}

foreach(int i, int j; a)
if(a[i] != b[i])
{
msg = "element #" ~ toString(i) ~ " unequal";
return false;
}
msg = "somthings wrong";
return false;
}