Uncomment resolutions of applied LWG issues

[CaseyCarter]

Covers:

• LWG-3085
• LWG-3664
• LWG-3723
• LWG-3742
• LWG-3807
• LWG-3857
• LWG-3867

I've verified that we completely implement the resolutions of these issues.

Drive-by: remove extraneous () in the constraints on basic_string_view's range constructor.

[strega-nil-ms]

This is missing changes in:

• tests/libcxx/expected_results.txt:623
• tests/libcxx/skipped_tests.txt:623
• tests/std/tests/P0220R1_string_view/test.cpp:376

diff --git a/tests/libcxx/expected_results.txt b/tests/libcxx/expected_results.txt
index dcb235da..bf43ff99 100644
--- a/tests/libcxx/expected_results.txt
+++ b/tests/libcxx/expected_results.txt
@@ -620,7 +620,7 @@ std/language.support/support.limits/support.limits.general/format.version.compil
 # libc++ doesn't yet implement LWG-3670
 std/ranges/range.factories/range.iota.view/iterator/member_typedefs.compile.pass.cpp FAIL
 
-# libc++ doesn't speculatively implement LWG-3857
+# libc++ doesn't yet implement LWG-3857
 std/strings/string.view/string.view.cons/from_range.pass.cpp FAIL
 std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp FAIL
 std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp FAIL
diff --git a/tests/libcxx/skipped_tests.txt b/tests/libcxx/skipped_tests.txt
index 6f494826..95e3cc63 100644
--- a/tests/libcxx/skipped_tests.txt
+++ b/tests/libcxx/skipped_tests.txt
@@ -620,7 +620,7 @@ language.support\support.limits\support.limits.general\format.version.compile.pa
 # libc++ doesn't yet implement LWG-3670
 ranges\range.factories\range.iota.view\iterator\member_typedefs.compile.pass.cpp
 
-# libc++ doesn't speculatively implement LWG-3857
+# libc++ doesn't yet implement LWG-3857
 strings\string.view\string.view.cons\from_range.pass.cpp
 strings\string.view\string.view.cons\from_string1.compile.fail.cpp
 strings\string.view\string.view.cons\from_string2.compile.fail.cpp
diff --git a/tests/std/tests/P0220R1_string_view/test.cpp b/tests/std/tests/P0220R1_string_view/test.cpp
index 78324c1c..0484c73d 100644
--- a/tests/std/tests/P0220R1_string_view/test.cpp
+++ b/tests/std/tests/P0220R1_string_view/test.cpp
@@ -373,7 +373,6 @@ constexpr bool test_case_range_constructor() {
     static_assert(!is_convertible_v<string_view, basic_string_view<char, constexpr_char_traits>>);
     static_assert(!is_convertible_v<basic_string_view<char, constexpr_char_traits>, string>);
 
-    // LWG-3857 basic_string_view should allow explicit conversion when only traits vary
     static_assert(is_constructible_v<string_view, basic_string<char, constexpr_char_traits>>);
     static_assert(is_constructible_v<basic_string_view<char, constexpr_char_traits>, string_view>);

[CaseyCarter]

This is missing changes in:

• tests/libcxx/expected_results.txt:623
• tests/libcxx/skipped_tests.txt:623

These are fixed in #3464. (I did some more extensive edits to these files, and wanted to avoid merge conflicts, so I left them alone in this PR.)

• tests/std/tests/P0220R1_string_view/test.cpp:376

Yeow - fixed. (I audited for other missed occurrences of all the pertinent LWG issues, and only found the mentions of LWG-3857 in the skip files you mention above.)

[StephanTLavavej]

I am neutral on the P0220R1_string_view change - while product code doesn't cite resolved LWG issues, test code often does (similar to how we cite bugs, even though ultimately it's the Standard telling us what to do), and this one just mentioned the number, instead of saying "per the proposed resolution". That said, this one is simple so the LWG issue doesn't provide significant useful context.

[StephanTLavavej]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

[StephanTLavavej]

// Thanks for removing these comments! 😻🎉🚀