bool is_terrain_mapped(const coord_def &p);

}
bool is_terrain_mapped(const coord_def &p)
{
    return (env.map(p).flags & MAP_MAGIC_MAPPED_FLAG);

        if (env.map(p).flags & MAP_MAGIC_MAPPED_FLAG)

        if (is_terrain_mapped(p))

        if (!wizard_map && is_terrain_known(*ri)
            && !(env.map(*ri).flags & MAP_MAGIC_MAPPED_FLAG))

        if (!wizard_map && is_terrain_known(*ri) && !is_terrain_mapped(*ri))

    {

    }

        case '~':

        case '~': fg = TILE_UNSEEN_ITEM; break;

        case 244:

    int t  = _tileidx_monster(idx, detected);
    int t0 = t & TILE_FLAG_MASK;

    int t    = _tileidx_monster(idx, detected);
    int t0   = t & TILE_FLAG_MASK;

            // if necessary add item brand

            // If necessary add item brand.

        // if necessary add item brand

        // If necessary add item brand.

        // Retain the magic mapped terrain, but don't give away the real
        // features either.
        if (is_terrain_mapped(gc))
        {
            unsigned int feature = grd(gc);
            unsigned int grid_symbol;
            unsigned short grid_color;
            get_item_symbol(feature, &grid_symbol, &grid_color);
            unsigned int fg;
            unsigned int bg;
            tileidx_unseen(fg, bg, grid_symbol, gc);
            env.tile_bk_bg(gc) = bg;
        }

            if (!is_terrain_seen(*ri))

            if (!is_terrain_seen(*ri) && !is_terrain_mapped(*ri))