qmk_firmware/keyboards/checkerboards/g_idb60/g_idb60.h

 /*
 Copyright 2021 Nathan Spears

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "quantum.h"

#define xxx KC_NO

#define LAYOUT_all( \
    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0A, k0B, k0C, k0D, k2D, \
    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1A, k1B, k1C, k1D,      \
    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2A, k2B, k2C,           \
    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3A, k3B, k3C,           \
    k40, k41, k42,                k43,                k44, k45, k46            \
) { \
    { k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0A, k0B, k0C, k0D }, \
    { k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1A, k1B, k1C, k1D }, \
    { k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2A, k2B, k2C, k2D }, \
    { k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3A, k3B, k3C, xxx }, \
    { k40, k41, k42, xxx, xxx, xxx, k43, xxx, xxx, xxx, k44, k45, k46, xxx }  \
}