Thread: Variadic Template Strangeness

I have the following code:

Code:

#include <iostream>

using namespace std;

template<typename... Args>
void ConsoleLog(Args... args)
{
  std::initializer_list<int>{ (std::cout << std::forward<Args>(args), 0)... };
}

int main()
{
  ConsoleLog("foo", 1, 3.14, false, std::endl);
  cout << "Hello, World!" << endl;
  return 0;
}

It fails, with the message:

Code:

main.cpp:13:46: error: too many arguments to function 'void ConsoleLog(Args...) [with Args = {}]'

If I remove std::endl from the argument list, it compiles just fine.

What rule is being violated by passing std::endl in this context?

I get the same output on all versions of G++ that I've tried, including 6.1.1.

Might be easier for ConsoleLog itself to always write a newline and flush.

Originally Posted by laserlight

Might be easier for ConsoleLog itself to always write a newline and flush.

That was my solution as well. It makes sense that logging to the console would always terminate with a proper line ending.