Test: unsigned_underflow.cpp
unsigned_underflow.cpp:15:9: error: expected unqualified-id before 'return'
   15 |         return (tail_ - head_ + capacity_) % capacity_;  // Correct modular arithmetic
      |         ^~~~~~
unsigned_underflow.cpp:18:6: error: expected ';' after class definition
   18 |     }
      |      ^
      |      ;
unsigned_underflow.cpp: In constructor 'RingBuffer::RingBuffer(size_t)':
unsigned_underflow.cpp:7:35: error: class 'RingBuffer' does not have any field named 'capacity_'
    7 |     RingBuffer(size_t capacity) : capacity_(capacity), head_(0), tail_(0) {}
      |                                   ^~~~~~~~~
unsigned_underflow.cpp:7:56: error: class 'RingBuffer' does not have any field named 'head_'
    7 |     RingBuffer(size_t capacity) : capacity_(capacity), head_(0), tail_(0) {}
      |                                                        ^~~~~
unsigned_underflow.cpp:7:66: error: class 'RingBuffer' does not have any field named 'tail_'
    7 |     RingBuffer(size_t capacity) : capacity_(capacity), head_(0), tail_(0) {}
      |                                                                  ^~~~~
unsigned_underflow.cpp: In member function 'void RingBuffer::push(int)':
unsigned_underflow.cpp:10:9: error: 'buffer_' was not declared in this scope
   10 |         buffer_.push_back(value);
      |         ^~~~~~~
unsigned_underflow.cpp:11:9: error: 'tail_' was not declared in this scope
   11 |         tail_ = (tail_ + 1) % capacity_;
      |         ^~~~~
unsigned_underflow.cpp:11:31: error: 'capacity_' was not declared in this scope
   11 |         tail_ = (tail_ + 1) % capacity_;
      |                               ^~~~~~~~~
unsigned_underflow.cpp: At global scope:
unsigned_underflow.cpp:20:20: error: non-member function 'bool isEmpty()' cannot have cv-qualifier
   20 |     bool isEmpty() const {
      |                    ^~~~~
unsigned_underflow.cpp: In function 'bool isEmpty()':
unsigned_underflow.cpp:21:16: error: 'head_' was not declared in this scope
   21 |         return head_ == tail_;
      |                ^~~~~
unsigned_underflow.cpp:21:25: error: 'tail_' was not declared in this scope
   21 |         return head_ == tail_;
      |                         ^~~~~
unsigned_underflow.cpp: At global scope:
unsigned_underflow.cpp:24:1: error: expected unqualified-id before 'private'
   24 | private:
      | ^~~~~~~
unsigned_underflow.cpp:29:1: error: expected declaration before '}' token
   29 | };
      | ^
unsigned_underflow.cpp: In function 'int main()':
unsigned_underflow.cpp:38:42: error: 'class RingBuffer' has no member named 'available'
   38 |     std::cout << "Available: " << buffer.available() << std::endl;
      |                                          ^~~~~~~~~
unsigned_underflow.cpp:39:39: error: 'class RingBuffer' has no member named 'isEmpty'
   39 |     std::cout << "Empty: " << (buffer.isEmpty() ? "yes" : "no") << std::endl;
      |                                       ^~~~~~~