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  9. Building demo projects with c++ 20 don't compile

Building demo projects with c++ 20 don't compile

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23 Nov 2021 10:32 #10381 by support
Replied by support on topic Building demo projects with c++ 20 don't compile
Hello.

I also get the warning:

Native\SDK\include\QuickOpc.h(19,1): warning C4279: 'or': identifier in type library 'BED7F4EA-1A96-11D2-8F08-00A0C9A6186D' is a keyword; use the 'rename' qualifier

So, this tells me what to do: In the QuickOpc.h file, I replaced
#define IMPORT_MSCORLIB "libid:BED7F4EA-1A96-11D2-8F08-00A0C9A6186D"
with
#define IMPORT_MSCORLIB "libid:BED7F4EA-1A96-11D2-8F08-00A0C9A6186D" \
	rename("or", "or1")
This resolves both the warning and the errors.

We will include this change with the next QuickOPC version. Thank you for reporting it.

Best regards

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22 Nov 2021 14:43 - 23 Nov 2021 07:57 #10374 by Erik
Building demo projects with c++ 20 don't compile was created by Erik
Hello,

I am trying to build the demo project for C++. With C++14 and C++ 17 the projects are building.
I have tried to build the software with version 2018.3 and with the newest version 2021.3.
I have changed the setting in the properties for the project:
Configuration properties
--> Generial
--> C++ Language Standard (ISO C++20 Standard (/std:c++ 20)

But with C++20 the projects are not building. See below for the output for the project RandomReads:


Severity Code Description Project File Line Suppression State
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14554
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14554
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14557
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14557
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14567
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14567
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14570
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14570
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2059 syntax error: '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2059 syntax error: ')' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14554
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14554
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14557
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14557
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14567
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14567
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14570
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14570
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2143 syntax error: missing ';' before '{' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2143 syntax error: missing ')' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2143 syntax error: missing ';' before '||' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2143 syntax error: missing ';' before '{' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2238 unexpected token(s) preceding ';' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14554
Error C2238 unexpected token(s) preceding ';' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14557
Error C2238 unexpected token(s) preceding ';' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14567
Error C2238 unexpected token(s) preceding ';' RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tlh 14570
Error C2447 '{': missing function header (old-style formal list?) RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2447 '{': missing function header (old-style formal list?) RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302
Error C2761 'HRESULT mscorlib::ITrackingHandler::MarshaledObject(const _variant_t &,mscorlib::_ObjRef *)': redeclaration of member is not allowed RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2296
Error C2761 'HRESULT mscorlib::ITrackingHandler::UnmarshaledObject(const _variant_t &,mscorlib::_ObjRef *)': redeclaration of member is not allowed RandomReads C:\Program Files (x86)\OPC Labs QuickOPC 2021.3\Examples-COM\CPP\VS2019\Win32\RandomReads\x64\Debug\mscorlib.tli 2302

So is it possible to create/build projects with C++ 20?
Last edit: 23 Nov 2021 07:57 by Erik.

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