Farm
| Paradigm(s) | imperative |
|---|---|
| Designed by | Julien Reichert & Vivien Maisonneuve |
| Appeared in | 2008 |
| Memory system | tape-based |
| Dimensions | one-dimensional |
| Computational class | Turing complete |
| Major implementations | OCaml implementation |
| Influenced by | Brainfuck |
Farm is an esoteric language based on brainfuck with some shortcut instructions, like changing the current pointed case to a (97 in ASCII code). As the name may suggest it, instructions are actually animal onomatopea, which can be written in french or english (some are even translated in german and dutch).
To run the program, there must be in first argument an input file containing ASCII text to be copied down with the instruction 'gloup'.
Language overview
The beginning of any program must be either cocorico or cock a doodle doo and the end must always be houuu or howl.
The language has a notation of comments - % ignores everything until the end of line, it will also ignore every character which is not a letter (except the - in hee-haw). Also note that for an instruction to be accepted, the onomatopea must be only one of the following:
- lower case only,
- upper case only or
- only lower case except for the first character.
Here is the complete list of onomatopea which have a brainfuck equivalent:
| Onomatopea | brainfuck equivalent | Description |
|---|---|---|
ouah, waf, wau, bark, arf, woof or ouaf
|
+
|
increment current byte (wraps around at 255) |
miaou, meow, miau, miauw, mew or miaow
|
-
|
decrement current byte (wraps around at 255) |
meuh or moo
|
>
|
increment pointer (doubles the array if it would get out of bounds to the right) |
coin, quack or couac
|
<
|
decrement pointer (throws an error if it gets out of bound) |
gloup, gloups or bloup
|
,
|
read one byte from input (throws error if there are no bytes to be read) |
groink or grunt
|
.
|
output the current byte as ASCII character |
sss or hiss
|
[
|
go past corresponding blater or blat if the current byte is zero
|
blater or blat
|
]
|
jump back to corresponding sss or hiss if the current byte is non-zero
|
The following onomatopea are shortcuts helpful for string operations:
| Onomatopea | Description |
|---|---|
cui, piu, chirp, tchip, twiet or tweet
|
write 97 (value of a)
|
squick, squeak or squeal
|
write 122 (value of z)
|
groar or roar
|
write 65 (value of A)
|
bzz or buzz
|
write 90 (value of Z)
|
hihan, heehaw or hee-haw
|
write 48 (value of 0)
|
bee or bleat
|
write 57 (value of 9)
|
cot or cluck
|
write 32 (value of )
|
The following onomatopea are shortcuts helpful for memory operations:
| Onomatopea | Description |
|---|---|
rouuu
|
exchange the current byte and the one in memory (initially zero) |
leo
|
replace current byte on tape with byte in memory (won't override the value in memory) |
coucou
|
begins the registering of a list of instructions (erases the current memory) |
glouglou or gobble
|
ends this registering, all memorized instructions are NOT done |
hihihi
|
makes at once all instructions in the memorized list |
Example program
An example of a program in Farm, printing Hello world!:
Cock a doodle doo roar bark bark bark bark bark bark bark grunt chirp bark bark bark bark grunt sss meow moo bark moo bark quack quack blater moo moo bark bark bark bark bark bark bark grunt grunt sss meow moo bark moo bark quack quack blater moo moo bark bark bark grunt moo cluck grunt moo squick meow meow meow grunt quack quack grunt bark bark bark grunt quack grunt quack quack meow grunt cluck bark grunt howl