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Const floating point bitcasts and classification #72449

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merged 4 commits into from
Aug 23, 2020
Merged

Const floating point bitcasts and classification #72449

merged 4 commits into from
Aug 23, 2020

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ecstatic-morse
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@ecstatic-morse ecstatic-morse commented May 22, 2020 •
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Makes the f32 and f64 methods described in #72447 and #72505 unstably const.

r? @RalfJung

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 22, 2020
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LGTM, but I'd also like to know what @oli-obk thinks.

@RalfJung RalfJung mentioned this pull request May 22, 2020
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Would it make sense to also add abs_private and is_finite to the batch of functions that are being constified here? It's just a trivial wrapper around to_bits/from_bits.

Asking for #72440.

@marmeladema marmeladema mentioned this pull request May 22, 2020
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Would it make sense to also add abs_private and is_finite to the batch of functions that are being constified here?

Sure.

@ecstatic-morse ecstatic-morse changed the title Const floating point bitcasts Const floating point bitcasts and classification May 23, 2020
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oli-obk commented May 26, 2020

lgtm. Stabilizing these will be blocked on stabilizing floating point types in const fn.

@Elinvynia Elinvynia added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 3, 2020
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Going through old PRs today. Is there still desire for this? I'll close if not.

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Sorry, I had no idea this was waiting for my review. @Elinvynia a ping would have helped. :)

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Unfortunately, we aren't allowed to ping team members.

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@bors r=RalfJung,oli-obk

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bors commented Jun 12, 2020

📌 Commit 9dadeb3 has been approved by RalfJung,oli-obk

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 12, 2020
RalfJung added a commit to RalfJung/rust that referenced this pull request Jun 12, 2020
@RalfJung
Rollup merge of rust-lang#72449 - ecstatic-morse:const-float-bitcast,…
802a9ac 
… r=RalfJung,oli-obk

Const floating point bitcasts and classification

Makes the `f32` and `f64` methods described in rust-lang#72447 and rust-lang#72505 unstably const.

r? @RalfJung
@RalfJung RalfJung mentioned this pull request Jun 12, 2020
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RalfJung commented Aug 7, 2020

@ecstatic-morse sorry for the long silence. Could you rebase and address my latest review? Then I think this can land.

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This is ready to go now. I don't see a path to stabilization for these until we resolve the questions around determinism that are blocking floating point operations inside const fn, but I don't see a reason that nightly users shouldn't be allowed to experiment with them.

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r=me with the test attributes fixed.

@ecstatic-morse @RalfJung
Fix compile-flags directive
130766c 
Co-authored-by: Ralf Jung <post@ralfj.de>
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@bors r+

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bors commented Aug 23, 2020

📌 Commit 130766c has been approved by RalfJung

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Aug 23, 2020
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bors commented Aug 23, 2020

⌛ Testing commit 130766c with merge 0ec9459...

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bors commented Aug 23, 2020

☀️ Test successful - checks-actions, checks-azure
Approved by: RalfJung
Pushing 0ec9459 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Aug 23, 2020
@bors bors merged commit 0ec9459 into rust-lang:master Aug 23, 2020
@CDirkx CDirkx mentioned this pull request Sep 4, 2020
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CDirkx added a commit to CDirkx/rust that referenced this pull request Sep 12, 2020
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Make all methods of Duration const
73e0a56 
Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Also adds tests for these methods in a const context, moved the test to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Sep 12, 2020
@Dylan-DPC
Rollup merge of rust-lang#76335 - CDirkx:const-duration, r=ecstatic-m…
d674504 
…orse

Make all methods of `Duration` unstably const

Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Moved the tests to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440

r? @ecstatic-morse
RalfJung added a commit to RalfJung/rust that referenced this pull request Sep 13, 2020
@RalfJung
Rollup merge of rust-lang#76335 - CDirkx:const-duration, r=ecstatic-m…
b0d59f4 
…orse

Make all methods of `Duration` unstably const

Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Moved the tests to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440

r? @ecstatic-morse
RalfJung added a commit to RalfJung/rust that referenced this pull request Sep 13, 2020
@RalfJung
Rollup merge of rust-lang#76335 - CDirkx:const-duration, r=ecstatic-m…
d6dbe32 
…orse

Make all methods of `Duration` unstably const

Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Moved the tests to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440

r? @ecstatic-morse
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Sep 16, 2020
@Dylan-DPC
Rollup merge of rust-lang#76335 - CDirkx:const-duration, r=ecstatic-m…
bc42cd8 
…orse

Make all methods of `Duration` unstably const

Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Moved the tests to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440

r? @ecstatic-morse
RalfJung added a commit to RalfJung/rust that referenced this pull request Sep 16, 2020
@RalfJung
Rollup merge of rust-lang#76335 - CDirkx:const-duration, r=ecstatic-m…
22dd07d 
…orse

Make all methods of `Duration` unstably const

Make the following methods of `Duration` unstable const under `duration_const_2`:
 - `from_secs_f64`
 - `from_secs_f32`
 - `mul_f64`
 - `mul_f32`
 - `div_f64`
 - `div_f32`

This results in all methods of `Duration` being (unstable) const.

Moved the tests to `library` as part of rust-lang#76268.

Possible because of rust-lang#72449, which made the relevant `f32` and `f64` methods const.

Tracking issue: rust-lang#72440

r? @ecstatic-morse
@ecstatic-morse ecstatic-morse deleted the const-float-bitcast branch October 6, 2020 01:42
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