CODEWITHSUNDEEP
c++classtemplatesheader
bug
bug

Reputation: 71

Template Class: error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

I'm having this errors in the code:

Error is found in this line in private functions: 

vector<HashEntry> array;

    #ifndef _HASHTABLE_H
    #define _HASHTABLE_H
    #include <vector>

    enum EntryType { ACTIVE, EMPTY, DELETED };

    Template <class HashedObj>
    struct HashEntry
    {
    HashedObj element;
    EntryType info;
    HashEntry( const HashedObj & e = HashedObj( ), EntryType i = EMPTY )
    : element( e ), info( i ) { }
    };

    template <class HashedObj>
    class HashTable
    {

    private:
    vector<HashEntry> array;
    int currentSize;
    const HashedObj ITEM_NOT_FOUND;
    bool isActive( int currentPos ) const;
    int findPos( const HashedObj & x ) const;

    public: 
    explicit HashTable( const HashedObj & notFound, int size = 101 );
    HashTable( const HashTable & rhs )
    : ITEM_NOT_FOUND( rhs.ITEM_NOT_FOUND ),
    array( rhs.array ), currentSize( rhs.currentSize ) { }


    const HashedObj & find( const HashedObj & x ) const;
    void makeEmpty( );
    void insert( const HashedObj & x );
    void remove( const HashedObj & x );
    const HashTable & operator=( const HashTable & rhs );

     };
    #endif

How can I fix this error C4430?

Upvotes: 1

Views: 4871

Answers (1)

πάντα ῥεῖ
πάντα ῥεῖ

Reputation: 1

HashEntry itself is a template class, and doesn't automatically deduce the template parameter type from the containing HashTable class. You need to change the array declaration as follows

template <class HashedObj>
class HashTable {

private:
    std::vector<HashEntry<HashedObj>> array;
                      // ^^^^^^^^^^^
    // ...
};

Upvotes: 0

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