I decided to get all the arrays to use the same interface as far as possible,
so I can "typeclass" them.. Imagine my annoyance when this program:
var aa = 0,0,0,0,0,0,0,0,0,0;
var va = varray[int] (10,0);
var da = darray[int] (10ul,0);
var sa = sarray[int] (0);
var i:int; forall i in 0 upto 9 do
set(&aa,i,i); println$ i,get(aa,i);
set(va,i,i); println$ i,get(va,i);
set(da,i.ulong,i); println$ i,get(da,i);
set(sa,i.ulong,i); println$ i,get(sa,i.ulong);
done
gave a bus error (on darray case). [Can you see why?]
So I thought, oh no, not a horrible
C++ bug in the gc again ... then I remembered, no .. Felix is actually
pretty reliable these days so .. darray uses varray so ..
proc _unsafe_set[t]: varray[t] * !ints * t = "$1[$2]=$3;";
proc set[t,ii in ints] (a:varray[t], i:ii,v:t) {
assert 0ul <= i.ulong and i.ulong < len a;
_unsafe_set(a,i.ulong,v);
}
Assertion Failure
Felix location: build/release/lib/std/varray.flx 79[5]-79[46]
C++ location : test/regress/rt/array-02.cpp 238
Well! How can this be?? So ..
var aa = 0,0,0,0,0,0,0,0,0,0;
var va = varray[int] (10,0);
var da = darray[int] (10ul,0);
var sa = sarray[int] (0);
len aa= 10
len va= 2
len da= 10
Wha?? Length 2?? Can you see why?
[BTW: Felix actually has a "range_check" macro and a special term,
but it is hard to use at the moment because the macro, like assert,
requires both Felix and C++ source references. The advantage
is it tells you the wrong value and the range it is supposed to be in.
I need to fix that]
--
john skaller
skal...@users.sourceforge.net
------------------------------------------------------------------------------
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http://p.sf.net/sfu/intel-dev2devfeb
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