The default interpreter for the eevo programming language. Read and evaluate all files in order given, if file name is - read from stdin. If no files are supplied launch the read-evaluate-print-loop (REPL) for interactive running of commands.

Options

-e EXPRESSION

Read EXPRESSION as a line of eevo code, evaluate, and print result

-r

Launch the REPL prompt. Default if no arguments are given. Useful for loading files and then running REPL after. Equivalent to -e ‘(repl)’

-h

Print help and exit

-v

Print version info and exit

Usage

Run the program from the command line to type a single command and press enter to see the result.

$ eevo
> Pair 1 2
[1 ... 2]
> list 1 (+ 1 1) 3 (* 2 2)
[1 2 3 4]

Alternatively you can pass a file name which will be opened and run, outputting the result before exiting.

$ echo '((Func (x) (+ x 1)) 10)' > inc.evo
$ eevo inc.evo
11

Commands can also be piped directing into eevo through the command line.

$ echo '(= "foo" "foo")' | eevo
True

Or given directly to eevo as an argument:

$ eevo -e "(reverse '(1/2 1/4 1/8 1/16))"
(1/16 1/8 1/4 1/2)

See Also

eevo(7)

See project at https://edryd.org/projects/eevo

View source code at https://git.edryd.org/eevo

Author

Edryd van Bruggen ed@edryd.org

License

zlib License