Bounds check
Chris via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Fri May 23 08:28:07 PDT 2014
On Friday, 23 May 2014 at 15:25:37 UTC, Meta wrote:
> On Friday, 23 May 2014 at 15:14:47 UTC, Chris wrote:
>> The following:
>>
>> import std.stdio;
>>
>> void main() {
>> int[5] arg;
>> arg[10] = 3; // Compiler says (of course):
>> Error: array index 10 is out of bounds arg[0 .. 5]
>> }
>>
>> import std.stdio;
>>
>> void main() {
>> int[5] arg;
>> foreach (i; 0..10) {
>> arg[i] = i;
>> }
>> }
>>
>> Compiler says nothing, but we get a runtime error 'Range
>> violation'.
>>
>> Bug or design?
>
> It is design I believe, but it should be possible for the
> compiler to unroll this loop at compile time and detect the out
> of bounds access.
That's what I thought too.
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