Question

So, I have this situation where I need to see if an object is in my stl map. If it isn’t, I am going to add it.

char symbolName[] = { 'H', 'e', 'l', 'l', 'o', '\0' }; map<string,TheObject> theMap; if (theMap.find(symbolName)==theMap.end()) {             TheObject theObject(symbolName);             theMap.insert(pair<string, TheObject>(symbolName,                     theObject)); } 

I am getting a core dump on the: theMap.find when the object is not already in the map. Supposedly, if the item is not in the map, it is supposed to return an iterator equivelent to map::end

What is going on here?

GCC: 3.4.6

Answer 1

It can crash because of many reasons. Without knowing the definition of at least TheObject‘s constructors, i think we are largely left to guess at the problem. So far, your code looks fine, but it can be simplified:

char symbolName[] = 'Hello'; map<string,TheObject> theMap; theMap.insert(make_pair(symbolName, TheObject(symbolName))); 

It won’t do anything if the symbol is already mapped, discarding the new TheObject object.