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October 5, 2020 00:32
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reverse polish notation lisp (from scopes)
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(('(1 2 3) 'reverse) print) | |
("hello world" print) | |
(((4 5 +) 2 >) print) | |
(module-name print) | |
((5 87 +) print) | |
((true false and) print) |
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inline arity-check (n ...) | |
va-lfold 0 | |
inline (__ arg count) | |
static-if (none? arg) | |
hide-traceback; | |
static-error | |
.. "expected " (tostring n) " arguments, got " (tostring count) | |
count + 1 | |
... | |
inline forward-args (head args...) | |
hide-traceback; | |
head args... | |
run-stage; | |
let forward-args-symbol = (Symbol "#forward-args") | |
fn list-handler (lst scope) | |
raising Error | |
let at next = (decons lst) | |
at as:= list | |
let head rest = (decons at) | |
if ((('typeof head) == Symbol) and ((head as Symbol) == forward-args-symbol)) | |
return lst scope | |
else | |
let head rrest = (decons ('reverse at)) | |
let rest = ('reverse rrest) | |
let expr = (cons head rest) | |
return | |
(cons ('tag (spice-quote [(cons forward-args-symbol expr)]) ('anchor head)) next) | |
scope | |
let list-handler = | |
box-pointer (static-typify list-handler list Scope) | |
run-stage; | |
let rpl-env = | |
do | |
let + - / // * ** < > <= >= == != | |
let print | |
let sugar-quote spice-quote | |
let true false | |
inline and (a b) | |
arity-check 2 a b | |
and a b | |
inline or (a b) | |
arity-check 2 a b | |
or a b | |
inline not (v) | |
arity-check 1 v | |
not v | |
indirect-let forward-args-symbol = forward-args | |
locals; | |
let argc argv = (launch-args) | |
if (argc < 3) | |
error "expected source file" | |
fn parse-module-name (filename) | |
let match? start end = ('match? "(^.+\\/?).+?(?=\\..+$)" filename) | |
if match? | |
slice filename start end | |
else | |
filename | |
let filename = (string (argv @ 2)) | |
hide-traceback; | |
load-module (parse-module-name filename) filename | |
scope = | |
'bind rpl-env list-handler-symbol list-handler |
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