Tests/ComplexOneConfig/Library/SystemDir/testSystemDir.h - third_party/github.com/Kitware/CMake - Git at Google

 // Purposely leave off the return type to create a warning.
 foo()
 {
   return 0;
 }
	// Purposely leave off the return type to create a warning.
	foo()
	{
	return 0;
	}