Probe.hh

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#ifndef PROBE_HH
#define PROBE_HH
 
#include "static_string_view.hh"
#include "Subject.hh"
#include "strCat.hh"
#include <string>
 
namespace openmsx {
 
class Debugger;
 
class ProbeBase : public Subject<ProbeBase>
{
public:
        ProbeBase(const ProbeBase&) = delete;
        ProbeBase& operator=(const ProbeBase&) = delete;
 
        [[nodiscard]] const std::string& getName() const { return name; }
        [[nodiscard]] std::string_view getDescription() const { return description; }
        [[nodiscard]] virtual std::string getValue() const = 0;
 
protected:
        ProbeBase(Debugger& debugger, std::string name,
                  static_string_view description);
        ~ProbeBase();
 
private:
        Debugger& debugger;
        const std::string name;
        const static_string_view description;
};
 
 
template<typename T> class Probe final : public ProbeBase
{
public:
        Probe(Debugger& debugger, std::string name,
              static_string_view description, T t);
 
        Probe& operator=(const T& newValue) {
                if (value != newValue) {
                        value = newValue;
                        notify();
                }
                return *this;
        }
 
        [[nodiscard]] operator const T&() const {
                return value;
        }
 
private:
        [[nodiscard]] std::string getValue() const override;
 
        T value;
};
 
template<typename T>
Probe<T>::Probe(Debugger& debugger_, std::string name_,
                static_string_view description_, T t)
        : ProbeBase(debugger_, std::move(name_), std::move(description_))
        , value(std::move(t))
{
}
 
template<typename T>
std::string Probe<T>::getValue() const
{
        return strCat(value);
}
 
// specialization for void
template<> class Probe<void> final : public ProbeBase
{
public:
        Probe(Debugger& debugger, std::string name, static_string_view description);
        void signal();
 
private:
        [[nodiscard]] std::string getValue() const override;
};
 
} // namespace openmsx
 
#endif