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debugability: macro metaprogramming: vararg counter returns 0 when token start with parenthesis #542

@mwierzbix

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@mwierzbix

Following macros:

  1. META_COUNT_VARAGS_BEFORE_COMPILE()
  2. META_COUNT_VARAGS_BEFORE_COMPILE(A)
  3. META_COUNT_VARAGS_BEFORE_COMPILE(1,2,3)
  4. META_COUNT_VARAGS_BEFORE_COMPILE((1+2)<<2)
  5. META_COUNT_VARAGS_BEFORE_COMPILE(2*(1+2))

should expand to:

  1. 0
  2. 1
  3. 3
  4. 1
  5. 1

but currently they expand to:

  1. 0
  2. 1
  3. 3
  4. 0
  5. 1

This, combined with _TRACE_EVENT_NTH in BASE_LOG in trace.h will break FW during any calls to _trace_event(..., (x+y)<<z , ...) in runtime (so no compiler warnings).

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