mirror of
https://github.com/kanaka/mal.git
synced 2024-09-20 01:57:09 +03:00
101 lines
3.6 KiB
Plaintext
101 lines
3.6 KiB
Plaintext
(de load-relative (Path)
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(load (pack (car (file)) Path)) )
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(load-relative "readline.l")
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(load-relative "types.l")
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(load-relative "reader.l")
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(load-relative "printer.l")
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(load-relative "env.l")
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(load-relative "func.l")
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(load-relative "core.l")
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(de READ (String)
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(read-str String) )
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(def '*ReplEnv (MAL-env NIL))
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(for Bind *Ns (set> *ReplEnv (car Bind) (cdr Bind)))
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(de EVAL (Ast Env)
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(catch 'done
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(while t
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(if (and (= (MAL-type Ast) 'list) (MAL-value Ast))
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(let (Ast* (MAL-value Ast)
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A0* (MAL-value (car Ast*))
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A1 (cadr Ast*)
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A1* (MAL-value A1)
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A2 (caddr Ast*)
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A3 (cadddr Ast*) )
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(cond
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((= A0* 'def!)
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(throw 'done (set> Env A1* (EVAL A2 Env))) )
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((= A0* 'let*)
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(let Env* (MAL-env Env)
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(for (Bindings A1* Bindings)
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(let (Key (MAL-value (pop 'Bindings))
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Value (EVAL (pop 'Bindings) Env*) )
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(set> Env* Key Value) ) )
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(setq Env Env* Ast A2) ) ) # TCO
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((= A0* 'do)
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(mapc '((Form) (EVAL Form Env)) (head -1 (cdr Ast*)))
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(setq Ast (last Ast*)) ) # TCO
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((= A0* 'if)
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(if (not (memq (MAL-type (EVAL A1 Env)) '(nil false)))
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(setq Ast A2) # TCO
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(if A3
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(setq Ast A3) # TCO
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(throw 'done *MAL-nil) ) ) )
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((= A0* 'fn*)
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(let (Binds (mapcar MAL-value A1*)
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Body A2
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Fn (MAL-fn
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(curry (Env Binds Body) @
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(let Env* (MAL-env Env Binds (rest))
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(EVAL Body Env*) ) ) ) )
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(throw 'done (MAL-func Env Body Binds Fn)) ) )
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(T
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(let (Ast* (MAL-value (eval-ast Ast Env))
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Fn (car Ast*)
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Args (cdr Ast*) )
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(if (isa '+MALFn Fn)
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(throw 'done (apply (MAL-value Fn) Args))
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(let Env* (MAL-env (get Fn 'env) (get Fn 'params) Args)
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(setq Ast (get Fn 'ast) Env Env*) ) ) ) ) ) )
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(throw 'done (eval-ast Ast Env)) ) ) ) )
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(de eval-ast (Ast Env)
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(let Value (MAL-value Ast)
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(case (MAL-type Ast)
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(symbol (get> Env Value))
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(list (MAL-list (mapcar '((Form) (EVAL Form Env)) Value)))
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(vector (MAL-vector (mapcar '((Form) (EVAL Form Env)) Value)))
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(map (MAL-map (mapcar '((Form) (EVAL Form Env)) Value)))
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(T Ast) ) ) )
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(set> *ReplEnv 'eval (MAL-fn (curry (*ReplEnv) (Form) (EVAL Form *ReplEnv))))
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(set> *ReplEnv '*ARGV* (MAL-list (mapcar MAL-string (argv))))
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(de PRINT (Ast)
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(pr-str Ast T) )
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(de rep (String)
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(PRINT (EVAL (READ String) *ReplEnv)) )
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(rep "(def! not (fn* (a) (if a false true)))")
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(rep "(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))")
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(load-history ".mal_history")
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(if (argv)
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(rep (pack "(load-file \"" (opt) "\")"))
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(use Input
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(until (=0 (setq Input (readline "user> ")))
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(let Output (catch 'err (rep Input))
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(if (isa '+MALError Output)
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(let Message (MAL-value Output)
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(unless (= Message "end of token stream")
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(prinl "[error] " Message) ) )
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(prinl Output) ) ) ) ) )
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(prinl)
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(bye)
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