Digest for comp.lang.c++@googlegroups.com - 6 updates in 1 topic

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• typedef structures broken - 6 Updates

typedef structures broken

Malcolm McLean <malcolm.arthur.mclean@gmail.com>: Jul 22 01:21AM -0700 Windows Visual C++ is now rejecting typedefed structures without tags.   e.g the following code   typedef struct { double x; double y; } Point;   clang still accepts it.   Anyone more information on this?

Bonita Montero <Bonita.Montero@gmail.com>: Jul 22 11:20AM +0200 Am 22.07.2023 um 10:21 schrieb Malcolm McLean: > double x; > double y; > } Point;   I can compile this with current MSVC and -std:C++14, -std:C++17 and -std:C++20.

Keith Thompson <Keith.S.Thompson+u@gmail.com>: Jul 22 03:45AM -0700 > } Point;   > clang still accepts it.   > Anyone more information on this?   What's the error message?   -- Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com Will write code for food. void Void(void) { Void(); } /* The recursive call of the void */

Malcolm McLean <malcolm.arthur.mclean@gmail.com>: Jul 22 04:21AM -0700 On Saturday, 22 July 2023 at 11:45:23 UTC+1, Keith Thompson wrote:   > > clang still accepts it.   > > Anyone more information on this? > What's the error message?   It broke on an Azure build. (Azure is a system which hosts compilers in the cloud. I develop on the Mac then submit the programs. Azure builds a Windows compatible version. But I can't easily regenerate the error message.) It was something like struct tag missing.

David Brown <david.brown@hesbynett.no>: Jul 22 05:50PM +0200 On 22/07/2023 10:21, Malcolm McLean wrote: > } Point;   > clang still accepts it.   > Anyone more information on this?   Pasting it into godbolt and testing with the latest MSVC does not complain. But I don't know the command-line switches involved.   Perhaps you have particular switches that make it reject this, even though it is valid code (AFAIK) ?

Malcolm McLean <malcolm.arthur.mclean@gmail.com>: Jul 22 09:34AM -0700 On Saturday, 22 July 2023 at 16:50:40 UTC+1, David Brown wrote: > complain. But I don't know the command-line switches involved.   > Perhaps you have particular switches that make it reject this, even > though it is valid code (AFAIK) ?   With Azure pipelines the pipeline is usually set up by other people who choose the compiler version and the flags. This avoids a situation in which a developer sets various esoteric options on his desktop and creates an executable, which can't be replicated by anyone else. But the disadvantage is that you don't actually know how it's been set up.   But something has gone wrong. I cut and pasted C circle drawing code into a .cpp file. And it rejected the typedef. When I converted the structure to the C++ idomatic form ( struct MyStructure { }; ), it was accepted.

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