Fist
Jump to navigation
Jump to search
Fist is an esolang created by User:Viba. Its name is derived from "Finite State", as Fist is merely finite state machine equivalent. It is effectively a more compact form of their earlier esolang FakeScript.
Description
Each line is a command. The following commands exist:
| Command | Description |
|---|---|
.X |
Outputs string X. |
? |
Accepts input as a string. |
X>Y |
If the previously accepted input is equal to X, jump to label Y. If X is an empty string (ie. >Y), jump to label Y unconditionally.
|
:X |
Declares a label identified as X. |
The program halts after the bottom of the program is reached.
Examples
Hello, world!
.Hello, world!
Truth-machine
? 0>0 1>1 >hlt :0 .0 >hlt :1 .1 >1 :hlt
+ interpreter
:c ? +>+ >c :+ .+ >c
It is can be implemented, because it is language with only "Push" command
Nope. interpreter
? .Nope.
Logic Gates
NOT
? 0>0 1>1 :0 .1 >end :1 .0 :end
AND
? 0>0x 1>1x :0x ? 1>0 0>0 :1x ? 1>1 0>0 :0 .0 >end :1 .1 :end
OR
? 0>0x 1>1x :0x ? 1>1 0>0 :1x ? 1>1 0>1 :0 .0 >end :1 .1 :end
NAND
? 0>0x 1>1x :0x ? 1>1 0>1 :1x ? 1>0 0>1 :0 .0 >end :1 .1 :end
NOR
? 0>0x 1>1x :0x ? 1>0 0>1 :1x ? 1>0 0>0 :0 .0 >end :1 .1 :end
XOR
? 0>0x 1>1x :0x ? 1>1 0>0 :1x ? 1>0 0>1 :0 .0 >end :1 .1 :end
XNOR
? 0>0x 1>1x :0x ? 1>0 0>1 :1x ? 1>1 0>0 :0 .0 >end :1 .1 :end
+- interpreter
:code ? +>+ ->- #>end :+ .1 >code :- .0 >code :end
Uses # to end the program. Counter value is numbers of 1 outputed - numbers of 0 outputed