explain why some functions are forward declared

Author: soundanalogous

examples/StandardFirmata/StandardFirmata.ino

@@ -91,6 +91,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);

examples/StandardFirmataBLE/StandardFirmataBLE.ino

@@ -108,6 +108,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);

examples/StandardFirmataChipKIT/StandardFirmataChipKIT.ino

@@ -88,6 +88,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);

examples/StandardFirmataEthernet/StandardFirmataEthernet.ino

@@ -161,6 +161,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);

examples/StandardFirmataPlus/StandardFirmataPlus.ino

@@ -116,6 +116,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);

examples/StandardFirmataWiFi/StandardFirmataWiFi.ino

@@ -174,6 +174,8 @@ byte servoCount = 0;
 
 boolean isResetting = false;
 
+// Forward declare a few functions to avoid compiler errors with older versions
+// of the Arduino IDE.
 void setPinModeCallback(byte, int);
 void reportAnalogCallback(byte analogPin, int value);
 void sysexCallback(byte, byte, byte*);