CODEWITHSUNDEEP
c++pointersdictionary
Aleks
Aleks

Reputation: 410

C ++ Issue with map and the Compare Class

I was hoping maybe someone could help me solve my issue. I get a lovely

No matching function for call to object of type 'const pCompare'

struct pCompare
 {
    bool operator()( const std::string & str1, const std::string & str2 ) const
    {
        return str1.compare( str2 ) == 0;
    }
 };
 std::string *t = new std::string ( "/test.html" );
 std::map<std::string*, std::string, pCompare> test;
 test.insert ( std::pair<std::string*, std::string> ( t, "héhé" ) );
 std::cout << test.find(new std::string ("/test.html") )->second;

Thanks for your help !

Upvotes: 0

Views: 792

Answers (1)

hege
hege

Reputation: 1017

First of all, do not do this, as it will screw up your map: You need an ordering function for the map, not an equality test.

Anyway, I guess you problem is that your key type std::string* but your function tests for string& . I haven't tried this, but this should do the trick:

bool operator()( std::string * str1, const std::string * str2 ) const
{
    return *str1 < *str2;
}

Upvotes: 4

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