https://github.com/uzimaru0000/ulmus

Ulmus is a Lisp implementation made with Elm
https://github.com/uzimaru0000/ulmus

Last synced: about 1 month ago
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Ulmus is a Lisp implementation made with Elm

• Host: GitHub
• URL: https://github.com/uzimaru0000/ulmus
• Owner: uzimaru0000
• License: mit
• Created: 2021-06-15T19:31:03.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2021-06-21T18:38:28.000Z (about 3 years ago)
• Last Synced: 2024-05-18T20:47:59.353Z (about 1 month ago)
• Language: Elm
• Homepage: https://package.elm-lang.org/packages/uzimaru0000/ulmus/latest/
• Size: 113 KB
• Stars: 5
• Watchers: 2
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-elm-pltd - ulmus - Ulmus is a Lisp implementation made with Elm. (Languages / Interpreters)

README

        
# ulmus

Ulmus is a Lisp implementation made with Elm

```elm

import Parser

import Platform exposing (worker)

import Ulmus

import Ulmus.AST as Ulmus exposing (show)

import Ulmus.Parser exposing (parser)

eval : String -> Result String AST

eval code =

    Parser.run parser code

        |> Result.mapError (always "error")

        |> Result.andThen (Ulmus.evalAll (Sybl NIL))

        |> Result.map Tuple.first

-- Value

eval "3" --> Ok (Sybl (Num 3))

eval "3.14" --> Ok (Sybl (Num 3.14))

eval "\"Hello\"" --> Ok (Sybl (Str "Hello"))

eval "nil" --> Ok (Sybl NIL)

eval "t" --> Ok (Sybl T)

-- Calculate

eval "(+ 1 2)" --> Ok (Sybl (Num 3))

eval "(+ 1 (* 1 2))" --> Ok (Sybl (Num 3))

-- Lambda

eval "((lambda (x) (+ x 1)) 10)" --> Ok (Sybl (Num 11))

-- If

eval "((lambda (x) (if (> x 10) x (* x 10))) 3)" --> Ok (Sybl (Num 30))

-- Cond

eval """

((lambda (x)

    (cond

      ((eq (mod x 15) 0) "fizzbuzz")

      ((eq (mod x 3) 0) "fizz")

      ((eq (mod x 5) 0) "buzz")

      (else x)

    )

 )

 15

)

""" --> Ok (Sybl (Str "fizzbuzz"))

-- Define function

eval """

(define fact (x)

  (if (<= x 1)

    x

    (* x (fact (- x 1)))

  )

)

(fact 10)

""" --> Ok (Sybl (Num 3628800))

-- comment

eval """

;; this line is comment

(+ 1 2)

"""

```

## Modules

### `Ulmus`

Core module

### `Ulmus.AST`

AST module

### `Ulmus.Parser`

Parser module

### `Ulmus.BuildIn`

BuildIn functions