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swap

This commit is contained in:
sforman 2023-08-11 20:38:01 -07:00
parent 9fbb7c05c3
commit ae7d854330
1 changed files with 2 additions and 1 deletions
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3
implementations/scheme-chicken/joy.scm
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@ -53,6 +53,7 @@
((is-it? "pop") (values (cdr stack) expression dict)) ((is-it? "pop") (values (cdr stack) expression dict))
((is-it? "stack") (values (cons stack stack) expression dict)) ((is-it? "stack") (values (cons stack stack) expression dict))
((is-it? "swaack") (values (cons (cdr stack) (car stack)) expression dict)) ((is-it? "swaack") (values (cons (cdr stack) (car stack)) expression dict))
((is-it? "swap") (values (cons (cadr stack) (cons (car stack) (cddr stack))) expression dict))
((hash-table-exists? dict symbol) ((hash-table-exists? dict symbol)
(values stack (append (hash-table-ref dict symbol) expression) dict)) (values stack (append (hash-table-ref dict symbol) expression) dict))
(else (error "Unknown word.")))) (else (error "Unknown word."))))
@ -135,6 +136,6 @@
(hash-table-set! dict (car def_list) (cdr def_list)))) (hash-table-set! dict (car def_list) (cdr def_list))))
(display (doit "1 2 3 [4 5 6] swaack pop stack")) (display (doit "1 2 3 [4 5 6] swaack pop swap stack"))
(newline) (newline)