Fold Expression not working

AKlep.1 · ‎2020-11-19

I am using IDE 1.5.0 with the -std=gnu++17 flag set

When trying to use fold expression, the compiler throws an error.

KnarfB · ‎2020-11-19

I'm not keen on new language features, but a simple test worked when test() called from main():

  template <typename... Ty>
  auto sum(Ty... args) {
    return (args + ...);
  }
 
  extern "C" int test()
  {
	 return sum(1,2,3);
  }

This is more a g++ question rather than STM.

Cartu38 OpenDev · ‎2020-11-19

STM32CubeIDE 1.5.0 (1.4.2 is fine too) no issue to me if C++17 usage. According to me proper g++ switch is "-std=c++17" not "-std=gnu++17"

AKlep.1 · ‎2020-11-19

It doesn't work for me and on -std = c ++ 17

AKlep.1 · ‎2020-11-19

Correction: works, but IDE emphasizes fold expression. Apparently we should expect further fixes.

Cartu38 OpenDev · ‎2020-11-19

Compiler (gcc/g++ here) is one thing, C editor code analysis engine another ...