qmk-firmware/users/billypython/billypython.c

#include "billypython.h"

__attribute__((weak))
bool process_record_keymap(uint16_t keycode, keyrecord_t *record) {
  return true;
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  if (!process_record_keymap(keycode, record)) {
    return false;
  }

  switch (keycode) {
  case CLEAR:
    if (record->event.pressed) {
      SEND_STRING(SS_LCTRL("a") SS_TAP(X_DELETE));
    }
    return false;

  default:
    return true;
  }
}

__attribute__((weak))
uint32_t layer_state_set_keymap(uint32_t state) {
  return state;
}

layer_state_t layer_state_set_user(layer_state_t state) {
  return layer_state_set_keymap(state);
}