An remapped HHKB layout for C++ programmers.

unimap_cpp_v1.c

#include "unimap_trans.h"

enum macro_id {
    CPP_POINTER,
    CPP_COMMENT,
};

// L0, for remapped X keycodes
// 1st row
#define AC_L0_LPRN       ACTION_MODS_KEY(MOD_LSFT, KC_9)
#define AC_L0_RPRN       ACTION_MODS_KEY(MOD_LSFT, KC_0)
// 2nd row
#define AC_L0_LCBK       ACTION_MODS_KEY(MOD_LSFT, KC_LBRACKET)
#define AC_L0_RCBK       ACTION_MODS_KEY(MOD_LSFT, KC_RBRACKET)
// 3rd row
#define AC_L0_COLN       ACTION_MODS_KEY(MOD_LSFT, KC_SCOLON)


#define AC_FN1           ACTION_LAYER_MOMENTARY(1)
// #define AC_FN2           ACTION_LAYER_TAP_KEY(2, KC_LCTRL)
#define AC_FN2           ACTION_LAYER_MOMENTARY(2)
#define AC_FN3           ACTION_LAYER_MOMENTARY(3)

#define AC_ENT2          ACTION_MODS_TAP_KEY(MOD_RCTL, KC_ENTER)

// L2, mainly for navigation
#define AC_L2(KEY)       ACTION_MODS_KEY(MOD_LCTL, KC_##KEY)
#define AC_L2_LNST       ACTION_MODS_KEY(MOD_LCTL, KC_A)
#define AC_L2_LNED       ACTION_MODS_KEY(MOD_LCTL, KC_E)

// L3, for remapped Shift+X keycodes
#define AC_L3(KEY)       ACTION_MODS_KEY(MOD_LSFT, KC_##KEY)

// 1st row
#define AC_L3_GRAV       ACTION_KEY(KC_GRAVE)
#define AC_L3_DBQT       ACTION_MODS_KEY(MOD_LSFT, KC_QUOTE)
#define AC_L3_SGQT       ACTION_KEY(KC_QUOTE)
#define AC_L3_PIPE       ACTION_MODS_KEY(MOD_LSFT, KC_BSLASH)
#define AC_L3_MINS       ACTION_KEY(KC_MINUS)
#define AC_L3_PLUS       ACTION_MODS_KEY(MOD_LSFT, KC_EQUAL)
#define AC_L3_LPRN       ACTION_MODS_KEY(MOD_LSFT, KC_9)
#define AC_L3_RPRN       ACTION_MODS_KEY(MOD_LSFT, KC_0)
#define AC_L3_LBKT       ACTION_KEY(KC_LBRACKET)
#define AC_L3_RBKT       ACTION_KEY(KC_RBRACKET)
#define AC_L3_AT         ACTION_MODS_KEY(MOD_LSFT, KC_2)
// 2nd row
#define AC_L3_TIDL       ACTION_MODS_KEY(MOD_LSFT, KC_GRAVE)
#define AC_L3_LSBK       ACTION_MODS_KEY(MOD_LSFT, KC_COMMA)
#define AC_L3_RSBK       ACTION_MODS_KEY(MOD_LSFT, KC_DOT)
#define AC_L3_HASH       ACTION_MODS_KEY(MOD_LSFT, KC_3)
#define AC_L3_DLLR       ACTION_MODS_KEY(MOD_LSFT, KC_4)

#define AC_L3_CCMT       ACTION_MACRO(CPP_COMMENT)
// 4th row
#define AC_L3_USCR       ACTION_MODS_KEY(MOD_LSFT, KC_MINUS)
#define AC_L3_QSTM       ACTION_MODS_KEY(MOD_LSFT, KC_SLASH)
#define AC_L3_CPTR       ACTION_MACRO(CPP_POINTER)
#define AC_L3_BSLS       ACTION_KEY(KC_BSLS)

#ifdef KEYMAP_SECTION_ENABLE
const action_t actionmaps[][UNIMAP_ROWS][UNIMAP_COLS] __attribute__ ((section (".keymap.keymaps"))) = {
#else
const action_t actionmaps[][UNIMAP_ROWS][UNIMAP_COLS] PROGMEM = {
#endif
    [0] = UNIMAP_HHKB(
    ESC, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   L0_LPRN,L0_RPRN,EQL,GRV,
    TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   L0_LCBK,L0_RCBK,    BSPC,
    FN2, A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,L0_COLN,            ENT2,
    FN3, Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,    FN3,            FN1,
         LALT,LGUI,               SPC,                     RGUI,RALT),

    // This is HHKB original Fn1 layer 
    [1] = UNIMAP_HHKB(
    PWR, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, INS, DEL,
    CAPS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,PSCR,SLCK,PAUS,TRNS,TRNS,     TRNS,
    TRNS,VOLD,VOLU,MUTE,TRNS,TRNS,PAST,PSLS,TRNS,TRNS,TRNS,TRNS,          PENT,
    TRNS,     TRNS,TRNS,TRNS,TRNS,TRNS,PPLS,PMNS,TRNS,TRNS,TRNS,     TRNS,TRNS,
         TRNS,TRNS,               TRNS,                    TRNS,TRNS),

    [2] = UNIMAP_HHKB(
    L2(ESC), L2(1),   L2(2),   L2(3),   L2(4),   L2(5),   L2(6),   L2(7),   L2(8),   L2(9),   L2(0),   L2(MINS),L2(EQL), L2(BSLS),L2(GRV),
    L2(TAB), L2(Q),   L2(W),   L2(E),   L2(R),   L2(T),   L2(Y),   L2_LNST, UP,      L2_LNED, HOME,    PGUP,    L2(RBRC),         L2(BSPC),
    NO,      L2(A),   L2(S),   L2(D),   L2(F),   L2(G),   L2(H),   LEFT,    DOWN,    RIGHT,   END,     PGDN,                      L2(ENT),
    L2(LSFT),L2(Z),   L2(X),   L2(C),   L2(V),   L2(B),   L2(N),   L2(M),   L2(COMM),L2(DOT), L2(SLSH),         L2(RSFT),NO,
         L2(LALT),L2(LGUI),             L2(SPC),                   L2(RGUI),L2(RALT)),

    [3] = UNIMAP_HHKB(
    L3_GRAV,L3(1),  L3_DBQT,L3_SGQT,L3_PIPE,L3(5),  L3(6),  L3(7),  L3(8),  L3_MINS,L3_PLUS,L3_LBKT,L3_RBKT,L3_USCR,L3_TIDL,
    L3_AT,  L3(Q),  L3(W),  L3(E),  L3(R),  L3(T),  L3(Y),  L3(U),  L3(I),  L3(O),  L3(P),  L3_LSBK,L3_RSBK,        DEL,
    TRNS,   L3(A),  L3(S),  L3(D),  L3(F),  L3(G),  L3(H),  L3(J),  L3(K),  L3(L),  L3_HASH,L3_DLLR,                L3_CCMT,
    TRNS,   L3(Z),  L3(X),  L3(C),  L3(V),  L3(B),  L3(N),  L3(M),  L3_QSTM,L3_CPTR,L3_BSLS,        TRNS,           TRNS,
         TRNS,  TRNS,                  L3_USCR,               TRNS,  TRNS),
};


const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
{
    switch (id) {
        case CPP_POINTER:
            return (record->event.pressed ?
                    MACRO( I(0), T(MINUS), ST(DOT), END ) :
                    MACRO_NONE );

        case CPP_COMMENT:
            return (record->event.pressed ?
                    MACRO( I(0), T(SLSH), T(SLSH), T(SLSH), END ) :
                    MACRO_NONE );
    }
    return MACRO_NONE;
}