Hello,
I've got some code which is controlled by

#define 

and

#if 

directives. If I set the

#define KEYPAD 0 

, the compilation fails,
but it compiles ok in the Arduino Studio.

The errors thrown are:
178:18: error: variable or field 'keypadEvent' declared void
Error compiling project sources
Debug build failed for project '<project>'
   * <comment line>
 
<project>.ino: 178:18: error: 'KeypadEvent' was not declared in this scope

What is weird is that line 178 isn't even a code line; it is in the middle of a block of comments...

The code I think it is complaining about begins:

#if KEYPAD
void keypadEvent(KeypadEvent key)
{ 

I tried changing to 'Release' and all it did was to change the line number of the error (it became 177)...

Can't see any breakpoints set.

Hi,

Thanks, it's important to use Release mode to remove possibility of confusion

I assume your code is in .ino file not .cpp? If so then add your own prototype for the method for your user type as follows. Notice a prototype is the same signature as the method but with ; on the end.

void keypadEvent(KeypadEvent key);

void keypadEvent(KeypadEvent key)
{
} 

Hi,

Maybe you don't need it. If KeypadEvent is not also defined in the .ino then you don't need it. If KeypadEvent is defined in the .ino code then you need to place your own prototype in a valid location.

Let's step back and assume KeypadEvent is a standard teensy type so you do not need a prototype.

What do you see in the arduino ide when you attempt to compile?

Hi,

Arduino made a new parser but it breaks easily so they are working on a better one for 1.9. We will move to that because the interim isn't a great solution and is slow.

In the meantime, you have defined a user-defined type in your .ino code so add the prototype as suggested

If this code was in .cpp file you would need to add the prototype normally. I agree that the #if condition would negate that  in this case but as a general rule prototypes are good.

Thanks