43 lines
1.7 KiB
Markdown
43 lines
1.7 KiB
Markdown
|
|
## Ludus: A friendly, dynamic, functional language
|
|
|
|
A reference implementation of an interpreter for the Ludus programming language, using Clojure as a host language.
|
|
|
|
Ludus is part of the [_Thinking with Computers_ project](https://thinking-with-computers.github.io), run by Scott Richmond at the University of Toronto. Ludus is our research language, which aspires to be a free translation of Logo for the 2020s.
|
|
|
|
### Status
|
|
Pre-alpha, still under active development. See [the ludus-spec repo for progress notes and additional documentation](https://github.com/thinking-with-computers/ludus-spec/blob/main/todo.md).
|
|
|
|
### Use
|
|
* Clone this repo.
|
|
- `git clone https://github.com/thinking-with-computers/cludus`
|
|
* Have Clojure and Leiningen installed.
|
|
- On a Mac: `brew install clojure leiningen`
|
|
* `lein run {script}`, it runs your script.
|
|
* Alternately, download a binary on the [releases page](https://github.com/thinking-with-computers/cludus/releases).
|
|
|
|
### `Hello, world!`
|
|
Ludus is a scripting language. At current it does not have a REPL (our aim is to get interactive coding absolutely correct).
|
|
|
|
Either
|
|
```
|
|
"Hello, world!"
|
|
```
|
|
`=> "Hello, world!"`
|
|
|
|
Ludus scripts (and blocks) simply return their last expression; this script returns the bare string (to `stdout`) and exits.
|
|
|
|
Or:
|
|
```
|
|
print ("Hello, world!")
|
|
```
|
|
```
|
|
=> Hello, world!
|
|
=> :ok
|
|
```
|
|
|
|
Or, you can use a the `print` function, which sends a string to `stdout`. Because `print` returns the keyword `:ok` when it completes, that is the result of the last expression in the script--and so Ludus also prints this.
|
|
|
|
### More on Ludus
|
|
Most of the (very active, somewhat messy) thinking about Ludus is housed in the [ludus-spec repository](https://github.com/thinking-with-computers/ludus-spec).
|