Make default values const expressions

Co-authored-by: Andrea Gilardoni <[email protected]>

Author: pennam

src/ArduinoIoTCloudTCP.h

@@ -47,14 +47,14 @@
 /******************************************************************************
    CONSTANTS
  ******************************************************************************/
-static char const DEFAULT_BROKER_ADDRESS[] = "iot.arduino.cc";
-static uint16_t const DEFAULT_BROKER_PORT_SECURE_AUTH = 8885;
-static uint16_t const DEPRECATED_BROKER_PORT_SECURE_AUTH = 8883;
-static uint8_t const DEPRECATED_BROKER_AUTHORITY_KEY_IDENTIFIER[] = {
+static constexpr char DEFAULT_BROKER_ADDRESS[] = "iot.arduino.cc";
+static constexpr uint16_t DEFAULT_BROKER_PORT_SECURE_AUTH = 8885;
+static constexpr uint16_t DEPRECATED_BROKER_PORT_SECURE_AUTH = 8883;
+static constexpr uint8_t DEPRECATED_BROKER_AUTHORITY_KEY_IDENTIFIER[] = {
                   0x5b, 0x3e, 0x2a, 0x6b, 0x8e, 0xc9, 0xb0, 0x1a, 0xa8, 0x54,
                   0xe6, 0x36, 0x9b, 0x8c, 0x09, 0xf9, 0xfc, 0xe1, 0xb9, 0x80 };
-static uint16_t const DEFAULT_BROKER_PORT_USER_PASS_AUTH = 8884;
-static uint16_t const DEFAULT_BROKER_PORT_AUTO = 0;
+static constexpr uint16_t DEFAULT_BROKER_PORT_USER_PASS_AUTH = 8884;
+static constexpr uint16_t DEFAULT_BROKER_PORT_AUTO = 0;
 
 /******************************************************************************
  * TYPEDEF