PROGMEM and Serial.print

is possible c++ function overloading tell difference between a string in progmem , "normal string" in ram?  casting typedef "prog_char" (as defined in pgmspace.h) doesn't seem sufficient (i guess both resolve same basic type far c++ concerned?)

i wondering myself, , little sketch seem show answer "yes":

code: [select]

#include <avr/pgmspace.h>

char string[] = "string1";
char progmem pstring[] = "string2";

class foo
{
public:
 void f(char *p)
 {
   serial.print("in char * version of f: ");
   serial.println(p);
 }

 void f(pgm_p p)
 {
   char buf[20];
   strcpy_p(buf, p);
   serial.print("in pgm_p version of f: ");
   serial.println(buf);
 }
};

void setup()
{
 foo f;
 serial.begin(9600);
 f.f(string);
 f.f((pgm_p)pstring);
}

void loop(){}

mikal

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