void main()
{
    auto x = 9223372036854775808; // long.max + 1
}

> onlineapp.d(3): Error: signed integer overflow

According to spec x should be of type ulong and this should compile? It indeed compiles if I add the uL postfix.

Is this a bug or indented behaviour?

On Saturday, 14 December 2019 at 07:09:30 UTC, Tobias Pankrath wrote:
> void main()
> {
>     auto x = 9223372036854775808; // long.max + 1
> }

You need to tell, that this is an unsigned long literal, else the compiler treats it as an int:

void main()
{
    auto x = 9223372036854775808UL; // long.max + 1
}

On Saturday, 14 December 2019 at 07:44:37 UTC, berni44 wrote:
> On Saturday, 14 December 2019 at 07:09:30 UTC, Tobias Pankrath wrote:
>> void main()
>> {
>>     auto x = 9223372036854775808; // long.max + 1
>> }
>
> You need to tell, that this is an unsigned long literal, else the compiler treats it as an int:
>
> void main()
> {
>     auto x = 9223372036854775808UL; // long.max + 1
> }

As far as I understand the spec, the type is inferred from the value range:

> Literal Type
> Usual decimal notation
>0 .. 2_147_483_647 int
> 2_147_483_648 .. 9_223_372_036_854_775_807 long
> 9_223_372_036_854_775_808 .. 18_446_744_073_709_551_615 ulong

See: https://dlang.org/spec/lex.html#integerliteral

What I am aiming at: Is the spec wrong or am I misunderstanding it and did this change recently?

On Saturday, 14 December 2019 at 09:33:13 UTC, Tobias Pankrath wrote:
> See: https://dlang.org/spec/lex.html#integerliteral
>
> What I am aiming at: Is the spec wrong or am I misunderstanding it and did this change recently?

You are right. The implementation does not do what the specs tell here.
I filed a bug report: https://issues.dlang.org/show_bug.cgi?id=20449

On Saturday, 14 December 2019 at 10:32:10 UTC, berni44 wrote:
> On Saturday, 14 December 2019 at 09:33:13 UTC, Tobias Pankrath wrote:
>> See: https://dlang.org/spec/lex.html#integerliteral
>>
>> What I am aiming at: Is the spec wrong or am I misunderstanding it and did this change recently?
>
> You are right. The implementation does not do what the specs tell here.
> I filed a bug report: https://issues.dlang.org/show_bug.cgi?id=20449

Thank you!