This is a simple interpreter for Paul Graham's Bel language.
The aim of this implementation is to support bootstrapping the language using its own source code which is written in Bel.
$ java -jar carillon-0.1.0.jar bel.bel --repl
BEL REPL. Press ^D to exit.
> (cons 'a 'b '(c d e))
(a b c d e)
> (cons \h "ello")
"hello"
> (2 '(a b c))
b
> (set w '(a (b c) d (e f)))
(a (b c) d (e f))
> (find pair w)
(b c)
> (pop (find pair w))
b
> w
(a (c) d (e f))
> (dedup:sort < "abracadabra")
(it freezes at the last expression for some reason...)
Reading expression and most core parts work. Try running the original Bel examples.
Some parts are work in progress, such as: continuations, threading, streams. Performance is just horrible at the moment.
Should you have any questions or ideas, please feel free to open an Issue.
Download a JAR file from the Releases section of this repository. Run the program with the jar command.
To run the REPL: jar ./carillon-0.1.0.jar --repl
To eval a bel file: jar ./carillon-0.1.0.jar FILE1.bel
You can also load a file before entering the REPL.
To evaluate the Bel interpreter, download the bel.bel file from PG's site. Then run:
java ./carillon-0.1.0.jar bel.bel --repl
For development, you will need Java JDK 8 and Maven.
Copyright 2019 Janos Erdos
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