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devel / comp.lang.c++ / VS2022 now possibly fit for purpose

SubjectAuthor
* VS2022 now possibly fit for purposeMr Flibble
`- Re: VS2022 now possibly fit for purposeChris M. Thomasson

1
VS2022 now possibly fit for purpose

<17605440b2f826c5$2$1196251$faa1aca7@news.newsdemon.com>

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https://www.rocksolidbbs.com/devel/article-flat.php?id=172&group=comp.lang.c%2B%2B#172

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Date: Thu, 18 May 2023 20:41:36 +0100
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From: flibble2@reddwarf.jmc.corp (Mr Flibble)
Subject: VS2022 now possibly fit for purpose
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 by: Mr Flibble - Thu, 18 May 2023 19:41 UTC

Hi!

Microsoft have finally shipped (17.7.0 Preview 1.0) a fix for a bug I
reported in back in March (which was a duplicate of a similar bug
reported in December) --
https://developercommunity.visualstudio.com/t/Problem-with-constexpr-and-accessing-non/10307212https://developercommunity.visualstudio.com/t/Problem-with-constexpr-and-accessing-non/10307212

Namely, the well-formed C++ below now compiles.

I wonder if Bonita Montero will now apologize for being a wrong, obtuse
Muppet.

/Flibble

#include <type_traits>
#include <memory>
#include <iostream>

namespace detail
{ template<typename T> struct is_smart_ptr : std::false_type {};
template<typename T> struct is_smart_ptr<std::shared_ptr<T>> :
std::true_type {};
template<typename T> struct is_smart_ptr<std::unique_ptr<T>> :
std::true_type {};
template<typename T>
inline constexpr bool is_smart_ptr_v = is_smart_ptr<T>::value;
}

template <typename T>
struct jar
{ typedef T value_type;

template <typename... Args>
void add(Args&&... aArgs)
{
if constexpr (!detail::is_smart_ptr_v<value_type>)
std::cout << "a";
else if constexpr (detail::is_smart_ptr_v<value_type> &&
std::is_abstract_v<typename value_type::element_type>)
std::cout << "b";
}
};

struct foo
{ };

int main()
{ jar<foo> j;
j.add(42);
return 0;
}

------

Build started...
1>------ Build started: Project: ConsoleApplication1, Configuration:
Debug x64 ------
1>Scanning sources for module dependencies...
1>std.ixx
1>std.compat.ixx
1>Compiling...
1>std.ixx
1>std.compat.ixx
1>ConsoleApplication1.cpp
1>ConsoleApplication1.vcxproj ->
C:\Users\leigh\source\repos\ConsoleApplication1\x64\Debug\ConsoleApplication1.exe
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Build started at 8:35 PM and took 17.065 seconds ==========

Re: VS2022 now possibly fit for purpose

<u45vhd$c0mv$1@dont-email.me>

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From: chris.m.thomasson.1@gmail.com (Chris M. Thomasson)
Newsgroups: comp.lang.c++
Subject: Re: VS2022 now possibly fit for purpose
Date: Thu, 18 May 2023 12:50:06 -0700
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 by: Chris M. Thomasson - Thu, 18 May 2023 19:50 UTC

On 5/18/2023 12:41 PM, Mr Flibble wrote:
> Hi!
>
> Microsoft have finally shipped (17.7.0 Preview 1.0) a fix for a bug I
> reported in back in March (which was a duplicate of a similar bug
> reported in December) --
> https://developercommunity.visualstudio.com/t/Problem-with-constexpr-and-accessing-non/10307212https://developercommunity.visualstudio.com/t/Problem-with-constexpr-and-accessing-non/10307212
>
> Namely, the well-formed C++ below now compiles.
>
> I wonder if Bonita Montero will now apologize for being a wrong, obtuse
> Muppet.
[...]
> Build started...
> 1>------ Build started: Project: ConsoleApplication1, Configuration:
> Debug x64 ------
> 1>Scanning sources for module dependencies...
> 1>std.ixx
> 1>std.compat.ixx
> 1>Compiling...
> 1>std.ixx
> 1>std.compat.ixx
> 1>ConsoleApplication1.cpp
> 1>ConsoleApplication1.vcxproj ->
> C:\Users\leigh\source\repos\ConsoleApplication1\x64\Debug\ConsoleApplication1.exe
> ========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
> ========== Build started at 8:35 PM and took 17.065 seconds ==========
>

Nice!

https://developercommunity.visualstudio.com/t/if-constexpr-compiler-bug-regression-/10235474

Well, shit I have:

https://i.ibb.co/J33b7fp/image.png

installed.

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