Array literals are weird. (page 5)

May 05, 2021

Re: Array literals are weird.

Posted by Imperatorn
in reply to Imperatorn

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Imperatorn

Posted in reply to Imperatorn

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On Wednesday, 5 May 2021 at 09:18:58 UTC, Imperatorn wrote:

On Wednesday, 5 May 2021 at 08:58:41 UTC, user1234 wrote:

On Saturday, 1 May 2021 at 11:32:47 UTC, Blatnik wrote:

I love how D redesigned the terrible C/C++ arrays. And it's awesome that array operations like element wise +, -, etc. are built into the language - it makes me want to use arrays and slices for everything. But there are still some rough edges in the design.

I have experimented some and found a few workarounds which might be acceptable.

But, I'm having some weird bug. On dmd and dmd-beta it works, but on dmd-nightly I get:

cannot interpret array literal expression [1, 2, 3] + [3, 2, 1] at compile time

I think this might be a regression?

Like, this works as I want:
https://run.dlang.io/is/rHRiP9

If I use dmd or dmd-beta. But if I change it to dmd-nightly it doesn't :(

😢😢😢

Output locally from https://run.dlang.io/is/ZUFFfZ:

PS C:\Temp\D\temp> dmd .\arrays.d
2096L
PS C:\Temp\D\temp> .\arrays.exe
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]
PS C:\Temp\D\temp> ldc2 .\arrays.d
2096L
PS C:\Temp\D\temp> .\arrays.exe
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]
[4, 4, 4]

On 04.05.21 20:16, Q. Schroll wrote: > > The operation necessitates an allocation and people here don't like hidden allocations. (Just some of them. Some of them obnoxiously loud. They shouldn't dictate language evolution.)

import std.stdio; immutable ic = [1, 2, 3] + [3, 2, 1]; const ca2 = [1, 2, 3] + [3, 2, 1]; enum ea2 = [1, 2, 3] + [3, 2, 1]; int[] i3 = [1, 2, 3] + [3, 2, 1]; auto a6 = [1, 2, 3] + [3, 2, 1]; void main() { pragma(msg, __VERSION__); auto a = [1, 2, 3]; auto b = [3, 2, 1]; enum ia2 = [1, 2, 3] + [3, 2, 1] + [1, 1, 1]; int[3] d; d = a[] + b[]; writeln(ia2); writeln(ic); writeln(ca2); writeln(ea2); writeln(a6); writeln(d); }

On Wednesday, 5 May 2021 at 09:33:47 UTC, Imperatorn wrote:

On Wednesday, 5 May 2021 at 09:28:45 UTC, Imperatorn wrote:

On Wednesday, 5 May 2021 at 09:18:58 UTC, Imperatorn wrote:

On Wednesday, 5 May 2021 at 08:58:41 UTC, user1234 wrote:

On Saturday, 1 May 2021 at 11:32:47 UTC, Blatnik wrote:

I have experimented some and found a few workarounds which might be acceptable.

But, I'm having some weird bug. On dmd and dmd-beta it works,

This all works with 2.096.0 and beta but not nightly

lol, nightlies are not updated since 13 monthes...

https://forum.dlang.org/post/avkkqfjtfrwtmnvpxbot@forum.dlang.org

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