LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague #3749

burblebee · 2020-02-19T05:48:58Z

Notes/issues:

This was based on branch motions-2020-02-lwg-2 in order to resolve conflicts which would otherwise arise.
LWG3247 not applied; conflicts with wording in LWG3299 (contacted lwgchair)
LWG3269 [time.parse]/p3 Fixed wording in list of constraints by adding "has" before "value is".
LWG3334 What about function declarations which are still in synopsis [syncstream.osyncstream.overview]?
LWG1203 I don't see that the modified operators were ever declared in class basic_istream - why is that? Note also that the referenced text was modified by other issues.
LWG3314 Wording in [time.duration.io] conflicts with that of LWG3317; applied anyway.
** Edit issue: \impldef may need work; Latex can't handle my attempts at:

\impldef{whether \tcode{\placeholder{units_suffix}} is \tcode{"\textmu{}s"} or \tcode{"us"} when \tcode{Period::type} is \tcode{micro}}
\impldef{whether the unit suffix is \tcode{"\textmu{}s"} or \tcode{"us"} when \tcode{Period::type} is \tcode{micro}}

Fixes #3705.
Fixes cplusplus/nbballot#371.
Fixes cplusplus/nbballot#269.
Fixes cplusplus/nbballot#270.
Fixes cplusplus/nbballot#226.
Fixes cplusplus/nbballot#151.
Fixes cplusplus/nbballot#167.
Fixes cplusplus/nbballot#280 (LWG3281 was superseded by LWG3282).
Fixes cplusplus/nbballot#281.

source/ranges.tex

source/utilities.tex

source/containers.tex

jensmaurer

Please augment each commit description with a "Also fixes NB US xxx (C++20 CD)." where applicable.

For example, LWG3328 fixes NL 375.
This is recorded in the source paper as "Addresses NL 375".

This is probably a situation where a force-push is desirable, despite these being straw-polls papers.

jensmaurer · 2020-02-21T21:41:05Z

LWG 3282 also fixes US 285, but is not marked as such.

Merged with P1721R2, which also converted the Remarks: element to a Constraints: element, but with a more consistent wording pattern.

…metic from pointer-interconvertible object

…ot satisfied in the example

…ime<Duration2, TimeZonePtr2> [time.zone.zonedtime.ctor] Inserted "the type" before the non-functions in the constraints because otherwise the wording "the return type of f(A) and B" can be parsed in a way that makes no sense.

…ides

…at negative numbers

[iterator.concept.winc] Fix "Expressions" to be singular when refering to "E".

…ally mean what we say" wording

…load constexpr

[range.refinements] Removed redundant parens and added missing "is true".

…th seconds

…ble iterators

… irange<const V>

…tor for a move-only iterator

Also fixes NB US 152 (C++20 CD).

… 169) Also fixes NB DE 169 (C++20 CD).

…tor_category

jensmaurer changed the title ~~Motions 2020 02 lwg 3~~ LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague Feb 19, 2020

jensmaurer added this to the post-2020-02 milestone Feb 19, 2020

JohelEGP suggested changes Feb 19, 2020

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JohelEGP reviewed Feb 20, 2020

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jensmaurer requested changes Feb 21, 2020

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jensmaurer added the changes requested Changes to the wording or approach have been requested and not yet applied. label Feb 21, 2020

JohelEGP mentioned this pull request Feb 21, 2020

LWG Poll 2: P2051R0 C++ Standard Library Issues to be moved in Prague #3748

Merged

burblebee force-pushed the motions-2020-02-lwg-3 branch from f95425d to 1493b4e Compare February 22, 2020 22:26

burblebee removed the changes requested Changes to the wording or approach have been requested and not yet applied. label Feb 22, 2020

burblebee requested a review from jensmaurer February 22, 2020 22:30

zygoloid force-pushed the motions-2020-02-lwg-3 branch 2 times, most recently from 9585655 to 24a0b15 Compare February 27, 2020 02:59

Dawn Perchik and others added 17 commits February 27, 2020 13:52

LWG1203 More useful rvalue stream insertion

ffb23d0

Merged with P1721R2, which also converted the Remarks: element to a Constraints: element, but with a more consistent wording pattern.

LWG2859 Definition of reachable in [ptr.launder] misses pointer arith…

5cb2353

…metic from pointer-interconvertible object

LWG3018 shared_ptr of function type

c36fe2d

LWG3050 Conversion specification problem in chrono::duration constructor

7fb48d1

LWG3141 CopyConstructible doesn't preserve source values

0433c2b

LWG3150 UniformRandomBitGenerator should validate min and max

4f8b121

LWG3175 The CommonReference requirement of concept SwappableWith is n…

f45c8df

…ot satisfied in the example

LWG3200 midpoint should not constrain T is complete

43307b1

LWG3201 lerp should be marked as noexcept

b795649

LWG3237 LWG 3038 and 3190 have inconsistent PRs

b1ac52a

LWG3238 Insufficiently-defined behavior of std::function deduction gu…

000771c

…ides

LWG3242 std::format: missing rules for arg-id in width and precision

6a5a1e0

LWG3243 std::format and negative zeroes

894c265

LWG3247 ranges::iter_move should perform ADL-only lookup of iter_move

852dd05

LWG3248 std::format #b, #B, #o, #x, and #X presentation types misform…

10bf2e6

…at negative numbers

LWG3250 std::format: # (alternate form) for NaN and inf

d13144b

Dawn Perchik added 27 commits February 27, 2020 17:56

LWG3362 Strike stop_source's operator!=

51f8eb3

LWG3363 drop_while_view should opt-out of sized_range

3065e49

LWG3364 Initialize data members of ranges and their iterators

a6c77a7

LWG3367 Integer-class conversions should not throw

e1322a6

[iterator.concept.winc] Fix "Expressions" to be singular when refering to "E".

LWG3369 span's deduction-guide for built-in arrays doesn't work

78cf96a

LWG3371 visit_format_arg and make_format_args are not hidden friends

b65c9bb

LWG3372 format_to should not try to deduce Out twice

681890f

LWG3373 {to,from}_chars_result and format_to_n_result need the "we re…

287caa4

…ally mean what we say" wording

LWG3374 P0653 + P1006 should have made the other std::to_address over…

5161ed3

…load constexpr

LWG3375 decay in viewable_range should be remove_cvref

de5d45f

LWG3377 elements_view::iterator befriends a specialization of itself

aedc6e2

LWG3379 "safe" in several library names is misleading

ee3a10b

LWG3380 common_type and comparison categories

bb8cc74

LWG3381 begin and data must agree for contiguous_range

2dad1b6

[range.refinements] Removed redundant parens and added missing "is true".

LWG3382 NTTP for pair and array

55f729c

LWG3383 [time.zone.leap.nonmembers] sys_seconds should be replaced wi…

824d859

…th seconds

LWG3384 transform_view::sentinel has an incorrect operator-

2da18b6

LWG3385 common_iterator is not sufficiently constrained for non-copya…

69d825b

…ble iterators

LWG3387 [range.reverse.view] reverse_view<V> unintentionally requires…

96e2bc4

… irange<const V>

LWG3388 view iterator types have ill-formed <=> operators

944bb13

LWG3389 A move-only iterator still does not have a counted_iterator

5c30109

LWG3390 make_move_iterator() cannot be used to construct a move_itera…

f343f31

…tor for a move-only iterator

LWG3393 Missing/incorrect feature test macro for coroutines

859d793

LWG3395 Definition for three-way comparison needs to be updated (US 152)

b6ef98b

Also fixes NB US 152 (C++20 CD).

LWG3396 Clarify point of reference for source_location::current() (DE…

ade9b15

… 169) Also fixes NB DE 169 (C++20 CD).

LWG3397 ranges::basic_istream_view::iterator should not provide itera…

99cce31

…tor_category

LWG3398 tuple_element_t is also wrong for const subrange

7f42183

zygoloid force-pushed the motions-2020-02-lwg-3 branch from 28fe6c3 to 7f42183 Compare February 28, 2020 01:56

zygoloid merged commit 1f642ba into master Feb 28, 2020

jensmaurer deleted the motions-2020-02-lwg-3 branch February 12, 2021 20:52

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LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague #3749

LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague #3749

burblebee commented Feb 19, 2020 •

edited by zygoloid

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jensmaurer commented Feb 21, 2020

LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague #3749

LWG Poll 3: P2117R0 C++ Standard Library Issues Resolved Directly In Prague #3749

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jensmaurer commented Feb 21, 2020

burblebee commented Feb 19, 2020 •

edited by zygoloid

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