import std.stdio;

void main() {

    auto x = 9223372036854775807L;
    auto x2 = 9223372036854775807L + 1;
    long x3 = -9223372036854775808U;
    //auto x4 = -9223372036854775808L; //Error: signed integer overflow

    writeln(x + 1); //-9223372036854775808
    writeln(x2);    //-9223372036854775808
    writeln(x3);    //-9223372036854775808
    //writeln(x4);
}

On Wednesday, 30 December 2015 at 14:07:54 UTC, Daniel Kozak wrote:
> import std.stdio;
>
> void main() {
>
>     auto x = 9223372036854775807L;
>     auto x2 = 9223372036854775807L + 1;
>     long x3 = -9223372036854775808U;
>     //auto x4 = -9223372036854775808L; //Error: signed integer overflow
>
>     writeln(x + 1); //-9223372036854775808
>     writeln(x2);    //-9223372036854775808
>     writeln(x3);    //-9223372036854775808
>     //writeln(x4);
> }

I reported this bug about 2-3 months ago, and people said something like it is same in C, and was reported a long time ago etc. So, nothing is changing about it.

On 12/30/15 9:07 AM, Daniel Kozak wrote:
> import std.stdio;
>
> void main() {
>
>      auto x = 9223372036854775807L;
>      auto x2 = 9223372036854775807L + 1;
>      long x3 = -9223372036854775808U;
>      //auto x4 = -9223372036854775808L; //Error: signed integer overflow

Not a bug.

This is parsed as - (9223372036854775808L)

That number cannot be represented in signed long, so it fails.

The only correct thing to do is via x3.

-Steve

On Wednesday, 30 December 2015 at 20:13:46 UTC, Steven Schveighoffer wrote:
> On 12/30/15 9:07 AM, Daniel Kozak wrote:
>> import std.stdio;
>>
>> void main() {
>>
>>      auto x = 9223372036854775807L;
>>      auto x2 = 9223372036854775807L + 1;
>>      long x3 = -9223372036854775808U;
>>      //auto x4 = -9223372036854775808L; //Error: signed integer overflow
>
> Not a bug.
>
> This is parsed as - (9223372036854775808L)
>
> That number cannot be represented in signed long, so it fails.
>
> The only correct thing to do is via x3.
>
> -Steve

Thanks :)