Test: unsigned_underflow.cpp
unsigned_underflow.cpp:16:10: warning: character constant too long for its type
   16 |         {'FIXED': 'Handle wraparound correctly\n        if (tail_ >= head_) {\n            return tail_ - head_;\n        } else {\n            return (capacity_ - head_) + tail_;\n        }'}
      |          ^~~~~~~
unsigned_underflow.cpp:16:19: warning: character constant too long for its type
   16 |         {'FIXED': 'Handle wraparound correctly\n        if (tail_ >= head_) {\n            return tail_ - head_;\n        } else {\n            return (capacity_ - head_) + tail_;\n        }'}
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
unsigned_underflow.cpp: In member function 'size_t RingBuffer::available() const':
unsigned_underflow.cpp:16:17: error: expected ';' before ':' token
   16 |         {'FIXED': 'Handle wraparound correctly\n        if (tail_ >= head_) {\n            return tail_ - head_;\n        } else {\n            return (capacity_ - head_) + tail_;\n        }'}
      |                 ^
unsigned_underflow.cpp:17:5: warning: no return statement in function returning non-void [-Wreturn-type]
   17 |     }
      |     ^