Use class without instance (like e.g. String)

[franks_pv]

@gfvalvo

Example:

class myClass {
  public:
    myClass(uint32_t x) : val(x) {};
    const char *formatPrint() {
      snprintf(stringBuf, maxLength, "Formated: %lu", val);
      return stringBuf;
    }

  private:
    static constexpr size_t maxLength {20};
    uint32_t val;
    char stringBuf[maxLength + 1] {0};
};

void setup() {
  Serial.begin(115200);
  delay(1000);

  Serial.println(myClass(123456).formatPrint());

}

void loop() {
}

Output:

Formated: 123456

Thank you for this example. This is exactly the solution I'm looking for. I've now learned that this feature works with every class - this I didn't know yet.

Thank you @all for your greatful support.

regards
Frank