What about using char's then? În 15 iunie 2024 15:36:16 EEST, "Mattias Andrée" <maand...@kth.se> a scris: >I have some general issues with _Bool: > >Arithmetic or bitwise operations on _Bool is subject to type promotion >making them rather pointless. > >With also be a problem if they were not, as you than couldn't sum of _Bool's >to find how many were set (commonly this we be to detect if more than 1 was >set). > >It is implementation-define which signness _Bool has, meaning, I don't know >if it will be promoted to a signed or an unsigned int. > >_Bool is only useful to make sure that a non-zero value is converted to the >value 1. And if this is absolutely necessarily, you should make this explicit, >e.g. with `!!x` or `x?1:0`. _Bool can introduce implicit and unnecessary >overhead to ensure that the value is always 1 or 0. And despite all this, >you can mess up and get _Bool's with a non-boolean value. > >It is implementation-defined how wide a _Bool is. > >_Bool will be at least the size of a byte, if you really want it to be a bit >if you have many of them, you can use bit fields or good old names values to >store multiple boolean values in one int. Generally you don't gain any real >savings by using a single byte type instead of an int if you only one or two >booleans. > >Basically, I like things to be explicit and well-defined. > > > >On Sat, 15 Jun 2024 11:54:02 +0000 >Zac <mac...@protonmail.com> wrote: > >> In a number of spots in dwm and st I've seen the use of integers as >> booleans. e.g. >> - dwm.c line 95, 140, 1870 >> - drw.c line 252 >> - st.c line 44, 48 >> >> That's not an extensive list; just some examples. >> >> I'm curious why you use ints though. Because bools are 31 bits smaller than >> ints, which is 31 bits of memory saved. Not that 31 bits is very much, but >> still... >> > >
-- Linux-gentoo-x86_64-Intel-R-_Core-TM-_i5-7400_CPU_@_3.00GHz COMMON_FLAGS="-O3 -pipe -march=native -ftree-vectorize -ffast-math -funswitch-loops -fuse-linker-plugin -flto -fdevirtualize-at-ltrans -fno-plt -fno-semantic-interposition -falign-functions=64 -fgraphite-identity -floop-nest-optimize" USE="-* git verify-sig rsync-verify man alsa X grub ssl ipv6 lto libressl olde-gentoo asm native-symlinks threads jit jumbo-build minimal strip system-man" INSTALL_MASK="/etc/systemd /lib/systemd /usr/lib/systemd /usr/lib/modules-load.d /usr/lib/tmpfiles.d *tmpfiles* /var/lib/dbus /lib/udev /usr/share/icons /usr/share/applications /usr/share/gtk-3.0/emoji /usr/lib64/palemoon/gtk2"
