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@@ -10,6 +10,7 @@ |
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(import ansi-escape-sequences) |
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(import (chicken file)) |
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(import breadline) |
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(import ncurses) |
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(define (lift fn parser) |
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(bind parser (compose result fn))) |
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@@ -258,7 +259,7 @@ |
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(define (set-hidden object value) |
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(database-set object 'hidden value)) |
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(define (get-hidden object) |
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(database-get object 'hidden #f)) |
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@@ -328,15 +329,27 @@ |
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(loop (cdr ln))))))) |
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(define (lisp body environments exit) |
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(define (lisp-eval body) |
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(cond ((atom? body) body) |
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((symbol? body) (reference body)) |
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((list? body) (let ((ln (map lisp-eval body))) |
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(apply (car ln) (cdr ln)))) |
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(else (exit "Unknown value type in evaluation.")))) |
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(define (reference symbol) |
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(cdr (any-or (curry assoc symbol) environments (exit (string-append "Undefined reference: " (symbol->string symbol)))))) |
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(define (lisp-apply function args) |
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(cond ((procedure? function) |
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(apply function args)) |
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((list? function) |
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(let ((function-arguments (cadr function)) |
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(function-body (cddr function))) |
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(lisp function-body (cons (if (= (length function-arguments) (length argument-values)) |
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(map cons function-arguments args) |
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(exit "Wrong number of arguments to function")) environments) exit))) |
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(else (exit "attempt to call atom")))) |
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(define (lisp-eval body) |
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(cond ((symbol? body) (reference body)) |
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((atom? body) body) |
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((list? body) (let ((ln (map lisp-eval body))) |
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(lisp-apply (car ln) (cdr ln)))) |
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(else (exit "Unknown value type in evaluation.")))) |
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(define (bind name value) |
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(set! environments (cons (let loop ((environment (car environments))) |
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@@ -344,66 +357,61 @@ |
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(list (cons name value)) |
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(if (eq? name (caar environment)) |
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(cons (cons name value) (cdr environment)) |
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(loop (cdr environment))))) |
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(cons (car environment) (loop (cdr environment)))))) |
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(cdr environments)))) |
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(define (lisp-apply function args) |
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(cond ((function? function) |
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(apply function args)) |
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((list? function) |
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(let ((function-arguments (car function)) |
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(function-body (cddr function))) |
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(lisp function-body (cons (if (= (length function-argumentsq) (length argument-values)) |
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(map cons function-arguments args) |
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(exit "Wrong number of arguments to function")) environments) exit))) |
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(_ (exit "attempt to call atom"))))) |
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(lisp-eval body)) |
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(define lisp-builtins |
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`((test . ,(lambda (function-args) |
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`((test . ,(lambda function-args |
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(show "test function called"))) |
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(if . ,(lambda (function-args) |
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(if . ,(lambda function-args |
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(match function-args |
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((e x y) (if (lisp-eval e) |
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(lisp-eval x) |
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(lisp-eval y))) |
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((e x y) (if e |
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x |
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y)) |
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(_ (exit "malformed if expression"))))) |
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(quote . ,(lambda (function-args) |
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(quote . ,(lambda function-args |
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(match function-args |
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((v) v) |
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(_ (exit "malformed quote expression"))))) |
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(cons . ,(lambda (function-args) |
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(cons . ,(lambda function-args |
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(match function-args |
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((a b) (cons (eval a) (eval b))) |
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((a b) (cons a b)) |
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(_ (exit "malformed cons expression"))))) |
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(car . ,(lambda (function-args) |
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(car . ,(lambda function-args |
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(match function-args |
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((a) (let ((ae (eval a))) |
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(if (atom? ae) |
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(exit "tried to take car of atom") |
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(car (eval a))))) |
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((a) (if (atom? a) |
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(exit "tried to take car of atom") |
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(car a))) |
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(_ (exit "malformed car expression"))))) |
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(cdr . ,(lambda (function-args) |
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(cdr . ,(lambda function-args |
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(match function-args |
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((a) (cdr (eval a)))))) |
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(atom . ,(lambda (function-args) |
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((a) (if (atom? a) |
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(exit "tried to take cdr of atom") |
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(cdr a))) |
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(_ (exit "malformed cdr expression"))))) |
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(atom . ,(lambda function-args |
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(match function-args |
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((a) (atom? (eval a))) |
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((a) (atom? a)) |
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(_ (exit "malformed atom expression"))))) |
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(eq . ,(lambda (function-args) |
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(eq . ,(lambda function-args |
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(match function-args |
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((a b) (equal? (eval a) (eval b))) |
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((a b) (equal? a b)) |
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(_ (exit "malformed eval expression"))))) |
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(set . ,(lambda (function-args) |
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(set . ,(lambda function-args |
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(match function-args |
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((a b) (if (symbol? a) |
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(bind a b)))))) |
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(lambda . ,(lambda (function-args) |
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match function-args |
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((args exp . exps) |
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(if (and (list? args) (every symbol? args)) |
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(cons args (cons exp exps)) |
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(exit "malformed lambda expression")) |
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(_ (exit "malformed lambda expression"))))))) |
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(bind a b) |
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(exit "tried to bind to non-symbol"))) |
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(_ (exit "malformed set expression"))))) |
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(lambda . ,(lambda function-args |
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(match function-args |
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((args exp . exps) |
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(if (and (list? args) (every symbol? args)) |
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(cons args (cons exp exps)) |
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(exit "malformed lambda expression")) |
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(_ (exit "malformed lambda expression")))))))) |
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(define (run-lisp body) |
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(call/cc (lambda (exit) |
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