i'm try to use a std::map with the key as Struct, but it fails on find the key. what is wrong here? Find does not find but insert will not change the count in the map.....
#pragma once
#include <map>
struct OccTestdef
{
public:
int Typ;
int Length;
OccTestdef(int typ, int length) :Typ(typ), Length(length) {};
bool operator < (const OccTestdef& R) const
{
if (Typ < R.Typ) return true;
if (Length < R.Length) return true;
return false;
}
};
typedef std::map<OccTestdef, int> Testmap;
typedef std::pair<OccTestdef, int> Testpair;
class testocc
{
public:
testocc();
~testocc(){}
bool runtest();
private:
Testmap tests;
int addOrInsert(int left, int num, int value);
};
and the cpp:
#include "testocc.h"
testocc::testocc()
{
tests = Testmap();
}
// Will Return the Map-Value if found or -1 if new Inserted
int testocc::addOrInsert(int left, int num, int value)
{
int res;
OccTestdef tn(left, num);
auto result = tests.find(tn);
if (result != tests.end()) {
res = result->second;
}
else
{
tests.insert(Testpair(tn, value));
res = -1;
}
return res;
}
bool testocc::runtest()
{
int res;
bool result;
// Fill map with 4 Entries
tests.insert(Testpair( OccTestdef(1, 100), 1));
tests.insert(Testpair(OccTestdef(1, 200), 2));
tests.insert(Testpair(OccTestdef(1, 300), 3));
tests.insert(Testpair(OccTestdef(1, 400), 4));
result = (tests.size() == 4);
// Try to find or Insert
res = addOrInsert(1, 200, 2);
//res should be 2
result = (res == 2);
result = (tests.size() == 4);
res = addOrInsert(2, 200, 20);
// Res must be -1 because new inserted
result = (res == -1);
// Count is not changed
result = (tests.size() == 5);
//These fails why?
res = addOrInsert(2, 200, 20);
//res should be 20
result = (res == 20);
return result;
}
I don't understand why the test.find() is not working as expected.
Your opeator<
will not order your elements properly because you return true if Typ
is smaller or if Length
is smaller.
#include <tuple>
bool operator < (const OccTestdef& R) const
{
return std::tie(Typ, Length) < std::tie(R.Typ, R.Length);
}
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