1: // Created by Frank M. Carrano and Timothy M. Henry.
2: // Copyright (c) 2017 Pearson Education, Hoboken, New Jersey.
4: // One definition:
5: template <class KeyType, class ValueType>
6: bool TreeDictionary<KeyType, ValueType>::add(const KeyType& searchKey,
7: const ValueType& newValue)
8: throw(PrecondViolatedExcept)
9: {
10: return itemTree.add(Entry<KeyType, ValueType>(searchKey, newValue));
11: } // end add
13: // Another definition:
14: template <class KeyType, class ValueType>
15: bool TreeDictionary<KeyType, ValueType>::add(const KeyType& searchKey,
16: const ValueType& newValue)
17: throw(PrecondViolatedExcept)
18: {
19: Entry<KeyType, ValueType> newEntry(searchKey, newValue);
20:
21: // Enforce precondition: Ensure distinct search keys
22: if (!itemTree.contains(newEntry))
23: {
24: // Add new entry and return boolean result
25: return itemTree.add(Entry<KeyType, ValueType>(searchKey, newValue));
26: }
27: else
28: {
29: auto message = "Attempt to add an entry whose search key exists in dictionary.";
30: throw(PrecondViolatedExcept(message)); // Exit the method
31: } // end if
32: } // end add