Minimal operation language
- Not to be confused with Minimal.
Minimal operation language is a test esolang by User:PythonshellDebugwindow.
Syntax
Each line is a sequence of unsigned integers of arbitrary size separated by operators (other than lines with goto), e.g.:
1 + 2 - 3 * 4 / 5
Spaces (other than newlines) don't matter. The result of each line is printed to STDOUT with a newline, so the above code would print:
0
because with Minimal operation language's OOO (see #Operators), and / being floor division:
(1 + 2) - ((3 * 4) / 5) = 0.6
Any question marks will be replaced with user input with the prompt ? , e.g.:
?
is a numeric cat program. Also:
1?5
with input 7 gives:
175
or with input 123 gives:
11235
or with input abc gives:
105
because abc is not a valid integer in Minimal operation language (regex: [0-9]+, no preceding + allowed)
Operators
| Operator | Operation | Precedence |
|---|---|---|
+ |
Addition | 5 |
- |
Subtraction | 6 |
* |
Multiplication | 3 |
/ |
Floor division | 4 |
^ |
Exponentiation | 2 |
( |
Grouping | 1 |
) |
Grouping | 1 |
== |
Equality | 7 |
!= |
Inequality | 8 |
Precedence is 1 for highest, meaning the higher the precedence, the sooner that operation will be solved. The subtraction operator returns the absolute value of its result, the equality operator returns 1 if its LHS and RHS are the same, otherwise 0, and the inequality operator returns 0 if its LHS and RHS are the same, otherwise 1.
Gotos
When a line starts with : (colon), the program will jump to the (0-based) Nth line of the program, where N is the number on the line after evaluation (minus the colon). The number on the line will not be printed, and jumping to an out-of-range line will terminate the program without an error. If a line starts with ; (semicolon) instead of :, then the number on the line will be printed before the jump, e.g.:
1 + 1 :0
would print out 2 forever, and:
1 + 1 ;0
would print out 2 (followed by 0) forever (2\n0\n2\n0...).
Conditional gotos
If you prefix a : or ; with a number, then the jump will only happen if that left number is not equal to 0. If a : is used, then no value will be printed out, even if the left number is equal to 0, but if a ; is used, then the right value will be printed out. For example:
?:3 0 :4 1
will print out 0 if user input is invalid or equal to 0, and will print out 1 otherwise. This example can be easily modified into a truth-machine.
Examples
Numeric cat
?
Add two inputs
? + ?
Truth-machine
?:3 0 :5 1 :3
Computational class
This language has no sign of memory, so it is a Finite-state automaton.
Resources
- An interpreter written in NodeJS by User:PythonshellDebugwindow (unfinished as of now)
- Interpreter written in Node.js by User:Hakerh400
- Interpreter written in Io by User:A (dead link)