Compilation error in MSVC 2017 with enabled /Zc:__cplusplus flag

[osipyonok]

Hello!

I've got a compilation error in MSVC 2017 with enabled /Zc:__cplusplus flag.
TBB version: TBB 2020 Update 3
Compiler: Microsoft (R) C/C++ Optimizing Compiler Version 19.16.27027.1 for x64 (141 toolset)
Standard: C++17 (/std:c++17)

Minimal code to reproduce the issue:

#include <tbb/concurrent_vector.h>
int main()
{
	tbb::concurrent_vector<int> vector;
	vector.push_back(1);
	return 0;
}

Build output:

1>c:\libs\tbb\tbb\include\tbb\concurrent_vector.h(680): error C2061: syntax error: identifier 'concurrent_vector<template-type-parameter-1',template-type-parameter-2'>'
1>c:\libs\tbb\tbb\include\tbb\concurrent_vector.h(1167): note: see reference to class template instantiation 'tbb::concurrent_vector<T,A>' being compiled
1>d:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.16.27023\include\memory_resource(845): note: see reference to class template instantiation 'std::pmr::_Intrusive_stackstd::pmr::monotonic_buffer_resource::_Header,void' being compiled
1>d:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.16.27023\include\memory_resource(465): note: see reference to class template instantiation 'std::pmr::_Intrusive_stackstd::pmr::unsynchronized_pool_resource::_Pool::_Chunk,void' being compiled
1>c:\libs\tbb\tbb\include\tbb\concurrent_vector.h(681): error C2334: unexpected token(s) preceding ':'; skipping apparent function body
1>c:\libs\tbb\tbb\include\tbb\concurrent_vector.h(1167): fatal error C1903: unable to recover from previous error(s); stopping compilation

Without /Zc:__cplusplus option it compiles succesfully. Also it compiles with TBB 2020 Update 1 regardless of the /Zc:__cplusplus flag status.

[Megidd]

I can confirm that a fix would be to downgrade to TBB 2020 Update 1 on Windows.

[alanb-sony]

You can either apply the fix from #299 or upgrade to visual studio 2019

[anton-potapov]

should work in oneTBB (as the patch applied)