From: Robert Ramey (ramey_at_[hidden])
Date: 2006-09-16 02:26:46
Experiment with something like:
class param_choice {
enum
{
PARAM_CHOICE_UINT8,
PARAM_CHOICE_UINT16,
PARAM_CHOICE_UINT32,
PARAM_CHOICE_INT8,
PARAM_CHOICE_BOOL
} m_current_value;
template<class Archive>
save(Archive &ar, unsigned int version);
std::string svalue;
switch(m_current_value){
case PARAM_CHOICE_UINT8:
svalue = "PARAM_CHOICE_UINT8";
...
}
ar << BOOST_SERIALIZATION_NVP(svalue);
}
template<class Archive>
load(Archive &ar, unsigned int version){
std::string svalue;
ar >> BOOST_SERIALIZATION_NVP(svalue);
if(svalue == std::string("PARAM_CHOICE_UINT8")
m_current_value = PARAM_CHOICE_UINT8;
else
if(...
...
}
};
Robert Ramey
"Graham Hudspith" <graham.hudspith_at_[hidden]> wrote in message news:000301c6d7fb$8e8a76c0$7701a8c0_at_ubiquisys.local...
Another "basic" question for the list again, apologies in advance.
I have a class with a data member which is an enumeration, e.g.:
typedef enum param_choice
{
PARAM_CHOICE_UINT8,
PARAM_CHOICE_UINT16,
PARAM_CHOICE_UINT32,
PARAM_CHOICE_INT8,
PARAM_CHOICE_BOOL
} param_choice_e;
I can quite happily user the Boost Serialization library to save and restore a class with a data member of this type:
class Stuff
{
friend std::ostream& operator<<(std::ostream& os, const Stuff& stuff
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive& ar, const unsigned int file_version)
{
ar & BOOST_SERIALIZATION_NVP(choice);
}
param_choice choice;
public:
Stuff () {}
Stuff (param_choice theChoice);
};
This is using XML as the file-format. The data member appears in the file as an integer.
However, what I would LIKE to do is output the value of "choice" as a string (e.g. instead of outputing <choice>2</choice>, the file contains <choice>UINT32</choice>). And do a conversion when I read it all back in again, of course.
Can someone please provide some pointers to where I can find out how to do this? Or an example?
Is the solution going to end up along the lines of:
a.. Split the serialize into separate load and save routines
b.. In the save, convert the data member into a string and output this to the archive
c.. In the load, input from the archive into a string and then store this into the data member
Best regards in anticipation,
Graham.
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