Location.h

#ifndef ROSE_Location_H
#define ROSE_Location_H

#include <ostream>
#include <string>

namespace Rose {

class Location {
public:
    // NOTICE: Subclasses must implemented a static "parse" method


    virtual ~Location() = default;

    virtual std::string toString() const = 0;

    virtual void print(std::ostream&) const = 0;

    virtual std::string printableName() const = 0;

    virtual bool isEqual(const Location &other) const = 0;
    virtual bool operator==(const Location &other) const final {
        return isEqual(other) && other.isEqual(*this);
    }
    virtual bool operator!=(const Location &other) const final {
        return !(*this == other);
    }
    virtual bool operator<(const Location&) const = 0;
    virtual bool operator<=(const Location&) const = 0;
    virtual bool operator>(const Location&) const = 0;
    virtual bool operator>=(const Location&) const = 0;

#ifdef _MSC_VER
    // buggy compiler unable to compile this declaration; error is "C2216: 'explicit' cannot be used with 'sealed'". So we'll
    // rely on the non-Microsoft compilers to enforce the "final".
    virtual explicit operator bool() const {
        return isValid();
    }
#else
    virtual explicit operator bool() const final {
        return isValid();
    }
#endif
    virtual bool isValid() const = 0;
    virtual bool operator!() const final {
        return isEmpty();
    }
    virtual bool isEmpty() const final {
        return *this ? false : true;
    }
};

inline std::ostream& operator<<(std::ostream &out, const Location &x) {
    x.print(out);
    return out;
}


} // namespace
#endif