Some keywords (type, CONSTANT) are not properly coloured in editor

[ubidefeo]

Describe the problem

The IDE uses a standard C++ syntax highlighting system. The result is that some keywords/types/CONSTANTS that are specific to the Arduino programming language do not get syntax highlighting in the Arduino IDE editor.

Examples include:

• byte
• OUTPUT
• INPUT
• INPUT_PULLUP
• LOW
• HIGH

To Reproduce

Steps to reproduce the behavior:

1. Create a Sketch
2. Replace its content with the following

   byte myNumber = 0;
   void setup() {
     pinMode(LED_BUILTIN, OUTPUT);
     pinMode(3, INPUT);
   }
   void loop() {
     digitalWrite(LED_BUILTIN, HIGH);
     delay(500);
     digitalWrite(LED_BUILTIN, LOW);
     delay(500);
   }

Expected behavior

Syntax highlighting is provided for all keywords of the Arduino programming language.

Arduino IDE version

2.0.0-beta.7

Operating system

All

Additional context

Note that highlighting for many of the Arduino language keywords are already provided by the C++ highlighter. No special treatment for those keywords is necessary.

---

Also reported at:

• Add syntax highlighting of constants/macros #1785
• some functions and constants doesn't colored like Arduino IDE 1.x #1485
• Byte type is not blue #890
• 'byte' not marked #108
• https://forum.arduino.cc/t/pinmode-output-input-and-input-pullup-do-not-change-color/861049/1
• https://forum.arduino.cc/t/pinmode-output-input-and-input-pullup-do-not-change-color/861049/3
• https://forum.arduino.cc/t/pinmode-output-input-and-input-pullup-do-not-change-color/861049/11
• https://forum.arduino.cc/t/code-colouring-boolean-vs-char/1033122
• https://forum.arduino.cc/t/arduino-ide-2-0-editor-text-color-mismatch-on-keyword-byte/1033975
• https://forum.arduino.cc/t/disimproved-editor-2-x/1049962
• https://forum.arduino.cc/t/ide-v2-0-2-program-interface-functions/1055809/3
• https://forum.arduino.cc/t/ide-2-1-1-colores-de-palabras-reservadas/1150024
• https://forum.arduino.cc/t/arduino-ide-2-2-1-vs-ide-1-8-13/1189218/5
• https://forum.arduino.cc/t/kodning-i-sketch/1212686
• https://forum.arduino.cc/t/pinmode-not-working/1244177
• https://forum.arduino.cc/t/arduino-ide-2-3-4-highlighting-keywords/1349225

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details

[mklemarczyk]

Any progress on this one? It has been almost a year.

[eMUQI]

Is this a feature or a bug? The Arduino 2.0.0 stable version now released on the Arduino official website still has this problem. Any progress on this?
@fstasi @ubidefeo