Revisions to class enum was not declared in this scope

added 6 characters in body

Source Link

edited Apr 7, 2021 at 8:56

18.3k
4
32
50

This is a known bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

The workaround for this bug is to follow good practice and declare all the structs, enums and classes before the first function definition.

This is a bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

The workaround for this bug is to follow good practice and declare all the structs, enums and classes before the first function definition.

This is a known bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

The workaround for this bug is to follow good practice and declare all the structs, enums and classes before the first function definition.

added 143 characters in body

Source Link

edited Jun 24, 2019 at 4:56

Juraj ♦

18.3k
4
32
50

This is a bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

The workaround for this bug is to follow good practice and declare all the structs, enums and classes before the first function definition.

This is a bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

This is a bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

The workaround for this bug is to follow good practice and declare all the structs, enums and classes before the first function definition.

Source Link

answered Jun 23, 2019 at 18:14

Juraj ♦

18.3k
4
32
50

This is a bug of Arduino builder, if you have functions before structs, classes or enums in sketch.

The sketch:

void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

is processed to this .cpp file

#include <Arduino.h>
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
#line 1 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"

#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo();
#line 7 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
String cycleToString(CYCLE cycle);
#line 17 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void setup();
#line 22 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void loop();
#line 2 "/tmp/arduino_modified_sketch_327776/sketch_jun23a.ino"
void foo() {
}

enum class CYCLE { TypeA, TypeB };

String cycleToString (CYCLE cycle) {
  if (cycle == CYCLE::TypeA) {
    return "TypeA";
  }
  else if (cycle == CYCLE::TypeB) {
    return "TypeB";
  }
  return "Undefined";
}

void setup() {
}

void loop() {
}

as you can see the forward declarations of functions are before the first function so before the enum.

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