1 unstable release
| 0.1.1 | Feb 27, 2022 |
|---|---|
| 0.1.0 |
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#757 in Programming languages
19KB
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OOLANG
OOLANG is an esoteric stack-based programming language where all instructions/commands are differnet unicode O characters
Usage
We have a custom Web IDE at https://oolang.tech, for experimenting in the browser.
You can also install OOLANG on your system with Cargo:
cargo install oolang
OOLANG files end in .oo, and consist of a number of commands specified each by a single unicode glyph. Any other character is ignored. Comments are supported using the # character, which comments out up to the end of the line.
oorun file.oo will execute your OOLANG program, reading from stdin and outputting to stdout.
Language Specification
OOLANG emulates a stack machine, not dissimilar to how the JVM or Python's bytecode interpreter works.
The virtual machine consists of a stack of bytes, and 256 bytes of addressable memory. A valid OOLANG program may consist of any combination of the the following 10 commands:
| Command | Unicode Character Name | Command Name | Description |
|---|---|---|---|
O |
Latin Capital Letter O | PUSH |
Push the value 1 onto the top of the stack |
0 |
Digit Zero | POP |
Pop the value from the top of the stack, discarding it |
Ǿ |
Latin Capital Letter O with Stroke and Acute | INC |
Pop the top stack value, increment it, push the result |
Ꮻ |
Cherokee Letter Wi | DEC |
Pop the top stack value, decrement it, push the result |
⭕ |
Heavy Large Circle | ADD |
Pop the top two stack values, add them, push the result |
𐍉 |
Gothic Letter Othal | JNZ |
Jump to the address at the top of the stack, if the 2nd-top value is non-zero |
Ꝍ |
Latin Capital Letter O with Loop | JZ |
Jump to the address at the top of the stack, if the 2nd-top value is zero |
◎ |
Bullseye | LOAD |
Pop from the stack, and push the value at the memory address specified |
◯ |
Large Circle | STORE |
Pop the top two values from the stack, storing the 2nd at the address specified by the 1st |
⒪ |
Parenthesized Latin Small Letter O | READ |
Read the next byte from stdin, pushing it to the top of the stack, or 0 if stdin is empty |
ₒ |
Latin Subscript Small Letter O | WRITE |
Pop from the stack and write the value to stdin as an ascii character |
Architecture
The language and interpreter are written in Rust. The compiled binary executable acts as a command line program, but the interpreter crate also exposes a public API. When compiled to webassembly, this API is used to provide functionality for the Web IDE within the browser.
Dependencies
~555KB