Cannot overload std::string const & function with const char *

Question

so I've got this:

class SettingBase {
public:
    virtual ~SettingBase() { }
};

template<typename T>
class Setting : private SettingBase {
    friend class Section;
public:
    std::string const &get_name() { return name; } // and my compiler
    const char *get_name() { return name.c_str(); } // doesn't like this.

    T const &get_value() throw() { return value; }

private:
    Setting(std::string name, T value) : name(name), value(value) { }
    Setting(const char *name, T value) : name(std::string(name)), value(value) { }

    std::string name;
    T value;
};

and then gcc says

config.cpp:74:17: error: ‘const char* Setting<T>::get_name()’ cannot be overloaded
config.cpp:73:24: error: with ‘const std::string& Setting<T>::get_name()’

Any particular reason for this?

Thanks,

Julian.

James McNellis · Accepted Answer · 2012-02-18 21:50:04Z

4

You cannot overload solely based on return type because the return type is not considered during overload resolution.

Two overloads must have different parameter types, different numbers of parameters, or (for member functions) different const-, volatile-, and reference-qualification.

edited Feb 18, 2012 at 21:50

answered Feb 18, 2012 at 19:08

James McNellis

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Comments

Alok Save · Accepted Answer · 2012-02-18 19:08:50Z

1

Because return type is not a criteria for function overloading.

answered Feb 18, 2012 at 19:08

Alok Save

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