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Better hermetic scoping

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This commit is contained in:
Nathan Braswell
2020-09-19 00:04:09 -04:00
parent 1d97366933
commit e8899fc093
1 changed files with 30 additions and 4 deletions
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34
new_kraken.kp
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@@ -1,5 +1,5 @@
((wrap (vau _ (quote)
((wrap (vau root_env (quote)
((wrap (vau _ (let1)
(let1 lambda (vau se (p b) (wrap (eval (array vau (quote _) p b) se)))
@@ -32,13 +32,39 @@
rec-lambda (vau se (p b) (eval (array Y (array lambda (quote (recurse)) (array lambda p b)))))
rep (Y (lambda (recurse) (wrap (vau de () (do (println (eval (read-string (get_line "> ")) de))
(recurse))))))
is_pair? (lambda (x) (and (array? x) (> (len x) 0)))
quasiquote (vY (lambda (recurse) (vau de (x)
(cond (is_pair? x)
(cond (and (symbol? (idx x 0)) (= (get-text (idx x 0)) "unquote"))
(eval (idx x 1) de)
true
(cond (and (is_pair? (idx x 0)) (symbol? (idx (idx x 0) 0)) (= (get-text (idx (idx x 0) 0)) "splice-unquote"))
(concat (eval (idx (idx x 0) 1) de) (vapply recurse (array (slice x 1 -1)) de))
true
(concat (array (vapply recurse (array (idx x 0)) de)) (vapply recurse (array (slice x 1 -1)) de))))
true x))))
scope_let (quasiquote ((unquote let) (
root_env (unquote root_env)
lambda (unquote lambda)
rec-lambda (unquote rec-lambda)
let (unquote let)
do (unquote do)
concat (unquote concat)
lapply (unquote lapply)
vapply (unquote vapply)
Y (unquote Y)
vY (unquote vY)
quasiquote (unquote quasiquote)
)
))
)
(do
(println "Welcome to Kraken! Parameters were" *ARGV*)
(cond (and (>= (len *ARGV*) 3) (= "-C" (idx *ARGV* 1))) (eval (read-string (idx *ARGV* 2)))
(> (len *ARGV*) 1) (eval (read-string (slurp (idx *ARGV* 1))))
true (rep)
(cond (and (>= (len *ARGV*) 3) (= "-C" (idx *ARGV* 1))) (eval (concat scope_let (array (read-string (idx *ARGV* 2)))) root_env)
(> (len *ARGV*) 1) (eval (concat scope_let (array (read-string (slurp (idx *ARGV* 1))))) root_env)
true (eval (concat scope_let (array (array rep))) root_env)
)
)
)