keyGroupOf function

KeyGroup keyGroupOf(
  1. KeyRole role
)

The key colour group of role (digit/decimal/sign → digit; operator; equals; everything else → function).

Implementation

KeyGroup keyGroupOf(KeyRole role) => switch (role) {
  KeyRole.digit || KeyRole.decimal || KeyRole.sign => KeyGroup.digit,
  KeyRole.operator => KeyGroup.operator,
  KeyRole.equals => KeyGroup.equals,
  _ => KeyGroup.function,
};