Coding ERROR compiling MARLIN 2.0

Using Arduino Programming Questions
1

CODE:
error: missing binary operator before token "("
#if EITHER(PARKING_EXTRUDER, MAGNETIC_PARKING_EXTRUDER)
^

Is Arduino IDE able to handle this "If EITHER(..."??
..and why NOT?

2

We can't see your code.

Please don't forget the code tags.

3

That depends on how the macro 'EITHER' is defined. I found it in Marlin/src/core/macros.h and it compiles without error for me.

// Macros to support option testing
#define NOT(x) IS_PROBE(_CAT(_NOT_, x)) // NOT('0') gets '1'. Anything else gets '0'.
#define SECOND(a,b,...)  b
#define _CAT(a,V...) a##V
#define CAT(a,V...) _CAT(a,V)
#define IS_PROBE(V...) SECOND(V, 0)     // Get the second item passed, or 0
#define PROBE() ~, 1                    // Second item will be 1 if this is passed
#define _NOT_0 PROBE()
#define NOT(x) IS_PROBE(_CAT(_NOT_, x)) // NOT('0') gets '1'. Anything else gets '0'.
#define _ISENA_     ~,1
#define _ISENA_1    ~,1
#define _ISENA_0x1  ~,1
#define _ISENA_true ~,1
#define _ISENA(V...)        IS_PROBE(V)
#define _ENA_1(O)           _ISENA(CAT(_IS,CAT(ENA_, O)))
#define _DIS_1(O)           NOT(_ENA_1(O))
#define _DO_2(W,C,A,B)     (_##W##_1(A) C _##W##_1(B))
#define __DO_N(W,C,N,V...) _DO_##N(W,C,V)
#define _DO_N(W,C,N,V...)  __DO_N(W,C,N,V)

// Use NUM_ARGS(__VA_ARGS__) to get the number of variadic arguments
#define _NUM_ARGS(_,n,m,l,k,j,i,h,g,f,e,d,c,b,a,Z,Y,X,W,V,U,T,S,R,Q,P,O,N,M,L,K,J,I,H,G,F,E,D,C,B,A,OUT,...) OUT
#define NUM_ARGS(V...) _NUM_ARGS(0,V,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)

#define DO(W,C,V...)       (_DO_N(W,C,NUM_ARGS(V),V))
#define DISABLED(V...)      DO(DIS,&&,V)
#define ANY(V...)          !DISABLED(V)
#define EITHER(V1,V2)       ANY(V1,V2)

#define PARKING_EXTRUDER 0
#define MAGNETIC_PARKING_EXTRUDER 1

#if EITHER(PARKING_EXTRUDER, MAGNETIC_PARKING_EXTRUDER)

#endif

void setup() {}
void loop() {}
4

.. and you are using ARDUINO IDE?

I looked in my version of MACROS.h and it do not look like yours, so have to find another version.

BUT... Thanks anyway...

5

Which specific version of Marlin are you compiling, which version of the Arduino IDE, which operation system, and for which 3D printer? Preferably post a link to the Configuration.h and Configuration_adv.h files if you downloaded them.

6

I just included the declaration of the EITHER() macro, not the whole file. Using the whole file, this compiles without error:

Arduino: 1.8.13 (Mac OS X), Board: "Arduino Uno"

#include "macros.h"

#define PARKING_EXTRUDER 0
#define MAGNETIC_PARKING_EXTRUDER 1

#if EITHER(PARKING_EXTRUDER, MAGNETIC_PARKING_EXTRUDER)

#endif

void setup() {}
void loop() {}
7

I found the right file, so now my problem is gone... Thanks to you johnwasser

8

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