C++ inheritance, can't access the inherited elements

Question

class SymbolNode {
    public:
        string name;
        Type type;
        int offset;
        SymbolNode(string name_, Type type_, int offset_): name(name_), type(type_), offset(offset_) {
        }
    };

class FuncNode : public SymbolNode {
    public:
        Type returnType;
        vector<Type> entries;
        FuncNode(string name_, Type type_, int offset_,Type returnType,vector<Type> entries):
                SymbolNode(name_,type_,offset_) ,returnType(returnType),entries(entries) {}
    };   

So I have the inherited class FuncNode of the base class SymbolNode. And when I try to access the elements of func I can't access all of them. I would like to add func to vector Symbols . But also have the ability to access all the elements.

std::shared_ptr<SymbolNode> func= make_shared<FuncNode>("inc",FUNC,1,INT,entries);
vector<std::shared_ptr<SymbolNode>> Symbols;

Answer 1

Try dynamic_cast or static_cast

Answer 2

std::shared_ptr<SymbolNode> func= make_shared<FuncNode>("inc",FUNC,1,INT,entries);

IN the above line, func is a (shared) pointer to the base class. As such, it doesn't know what it's derived type this. Hence, it can't access the members of FuncNode

You can express it as this:

std::shared_ptr<FuncNode> func= make_shared<FuncNode>("inc",FUNC,1,INT,entries);

Or do this:

std::shared_ptr<SymbolNode> symnode = make_shared<FuncNode>("inc",FUNC,1,INT,entries);

std::shared_ptr<FuncNode> func = static_pointer_cast<FuncNode>(symnode);