Can't use sizeof... to initialize struct template members

[Ebola-Chan-bot]

#include<stdint.h>
template<typename... Ts>
struct InfoArray {
  uint8_t Number = sizeof...(Ts);
};

The code above does not compile.

C:\Users\vhtmf\Documents\Arduino\sketch_nov5a\sketch_nov5a.ino:4:20: error: expected ';' at end of member declaration
   uint8_t Number = sizeof...(Ts);
                    ^
C:\Users\vhtmf\Documents\Arduino\sketch_nov5a\sketch_nov5a.ino:4:26: error: expected unqualified-id before '...' token
   uint8_t Number = sizeof...(Ts);
                          ^
C:\Users\vhtmf\Documents\Arduino\sketch_nov5a\sketch_nov5a.ino:4:20: error: expected primary-expression at end of input
   uint8_t Number = sizeof...(Ts);
                    ^

exit status 1

Compilation error: expected ';' at end of member declaration

[christyogi]

Use constexpr static uint8_t Number = sizeof...(Ts);

[Ebola-Chan-bot]

Use constexpr static uint8_t Number = sizeof...(Ts);

Your code doesn't have the same meaning as mine. What I need must be a non-static member variable.

[christyogi]

This maybe?

#include<stdint.h>
template<typename... Ts>
struct InfoArray {
  uint8_t Number;
  InfoArray() : Number{sizeof...(Ts)} {};
};

[christyogi]

Just doing

  uint8_t Number = {sizeof...(Ts)};

seems fine in fact

[Ebola-Chan-bot]

Just doing

  uint8_t Number = {sizeof...(Ts)};

seems fine in fact

This is exactly what I did as a workaround.