hashtable.cpp

// hashtable.hpp
class HashTable {
public:
  struct HashTable::HashEntry* insert(int);

  struct HashEntry {
    // Some stuff
  };
};


// hashtable.cpp
struct HashTable::HashEntry* HashTable::insert(int item) {
  // Do stuff
  return &elements[0];
}


// Compile Error:
// In file included from hashtable.cpp:2:
// hashtable.hpp:10: error: ‘HashEntry’ in class ‘HashTable’ does not name a type
// hashtable.cpp:19: error: prototype for ‘HashTable::HashEntry* HashTable::insert(int)’ does not match any in class ‘HashTable’
// hashtable.hpp:10: error: candidate is: int* HashTable::insert(int)
// hashtable.cpp:19: error: ‘HashTable::HashEntry* HashTable::insert(int)’ cannot be overloaded
// hashtable.hpp:10: error: with ‘int* HashTable::insert(int)’
// make: *** [hashtable.o] Error 1