How to handle long serialization mechanism in fmt 5 ?

[jcelerier]

I have a bunch of code with 4.x which uses a single fmt::MemoryWriter to write a lot of things - the things being written can change according to runtime conditions, e.g.

 void debug_stuff(fmt::MemoryWriter& wr, some_stuff, some_other_stuff, ...) { 
   if(whatever)
   {
      wr << some_stuff << some_other_stuff;
   }
   else
   {
     wr << "boop boop" << some_stuff << "beep beep";
     debug_other_stuff(wr, other_stuff);
   }
 }

how to handle these cases with fmt 5.x ?

[jcelerier]

e.g. here's an actual example code I had:

fmt::MemoryWriter& operator<<(fmt::MemoryWriter& w, const ossia::net::node_base& n) {
  auto parent = n.get_parent();
  while (parent != nullptr)
  {
    w << '\t';
    parent = parent->get_parent();
  }
  w << n.get_name();
  if (auto addr = n.get_parameter())
  {
    w << " : " << value_to_pretty_string(addr->value()) << ", AccessMode("
      << addr->get_access() << ")"
      << ", BoundingMode(" << addr->get_bounding() << ")"
      << ", Domain(" << addr->get_domain() << ")"
      << ", Unit(" << ossia::get_pretty_unit_text(addr->get_unit()) << ")";
  }
  return w;
}

[vitaut]

You can call format_to repeatedly, e.g.

void debug_stuff(fmt::memory_buffer& wr, int some_stuff, int some_other_stuff) { 
   if (whatever)
   {
     format_to(wr, "{}{}", some_stuff, some_other_stuff);
   }
   else
   {
     format_to(wr, "boop boop{}beep beep", some_stuff);
     debug_other_stuff(wr, some_other_stuff);
   }
 }