Test: unsigned_underflow.cpp
unsigned_underflow.cpp: In member function 'size_t RingBuffer::available() const':
unsigned_underflow.cpp:19:21: error: 'SIZE_MAX' was not declared in this scope
   19 |             return (SIZE_MAX - head_) + tail_ + 1;
      |                     ^~~~~~~~
unsigned_underflow.cpp:3:1: note: 'SIZE_MAX' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
    2 | #include <vector>
  +++ |+#include <cstdint>
    3 |