The fairy-lisp from zephyrfalcon

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Interpreter for an experimental Lisp dialect

Shell 0.19% D 89.59% Scheme 10.04% Slash 0.14% Forth 0.04%

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fairy-lisp's Issues

list are not mutable? e.g.: (set! (car x) 4) ERROR: SET!: name must be a symbol

In Lisp (SBCL), list is mutable:

* (defvar x '(1 2 3))
X
* x
(1 2 3)
* (setf (car x) 4)
4
* x
(4 2 3)

in fairy-lisp:

$ ./fairy-lisp 
Welcome to Fairy Lisp 0.1.
> (define x '(1 2 3))
(1 2 3)
> (car x)
1
> (set! (car x) 4)
ERROR: SET!: name must be a symbol
---frame 0---
  compound -- not done
  expression: (set! (car x) 4)
  evaluated: []
  to be evaluated: ["set!", "(car x)", "4"]
::
errors.TypeError@source/special.d(271): SET!: name must be a symbol
----------------
??:? [0x564d26dda856]
??:? [0x564d26dda4d2]
??:? [0x564d26e023f6]
??:? [0x564d26de282c]
source/special.d:271 [0x564d26d3c20c]
source/interpreter.d:185 [0x564d26d3ee89]
source/interpreter.d:211 [0x564d26d3f897]
source/interpreter.d:222 [0x564d26d3cd4a]
source/repl.d:42 [0x564d26d3c49b]
source/app.d:16 [0x564d26d523c0]

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