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lis.py: explicit var in first match/case

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This commit is contained in:
Luciano Ramalho 2021-06-09 19:58:43 -03:00
parent 36afc017d4
commit d88b17c75f
3 changed files with 36 additions and 26 deletions
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4
18-context-mngr/lispy/py3.10/lis.py
View File

@ -142,8 +142,8 @@ def lispstr(exp: object) -> str:
def evaluate(x: Expression, env: Environment) -> Any:
"Evaluate an expression in an environment."
match x:
case str(): # variable reference
return env[x]
case str(var): # variable reference
return env[var]
case literal if not isinstance(x, list): # constant literal
return literal
case ['quote', exp]: # (quote exp)

29
18-context-mngr/lispy/py3.10/lis_test.py
View File

@ -14,30 +14,35 @@ ENV_FOR_FIRST_TEST = standard_env()
("(+ (* 2 100) (* 1 10))", 210),
("(if (> 6 5) (+ 1 1) (+ 2 2))", 2),
("(if (< 6 5) (+ 1 1) (+ 2 2))", 4),
("(define x 3)", None), ("x", 3), ("(+ x x)", 6),
("(define x 3)", None),
("x", 3),
("(+ x x)", 6),
("((lambda (x) (+ x x)) 5)", 10),
("(define twice (lambda (x) (* 2 x)))", None), ("(twice 5)", 10),
("(define twice (lambda (x) (* 2 x)))", None),
("(twice 5)", 10),
("(define compose (lambda (f g) (lambda (x) (f (g x)))))", None),
("((compose list twice) 5)", [10]),
("(define repeat (lambda (f) (compose f f)))", None),
("((repeat twice) 5)", 20), ("((repeat (repeat twice)) 5)", 80),
("((repeat twice) 5)", 20),
("((repeat (repeat twice)) 5)", 80),
("(define fact (lambda (n) (if (<= n 1) 1 (* n (fact (- n 1))))))", None),
("(fact 3)", 6),
("(fact 50)", 30414093201713378043612608166064768844377641568960512000000000000),
("(define abs (lambda (n) ((if (> n 0) + -) 0 n)))", None),
("(list (abs -3) (abs 0) (abs 3))", [3, 0, 3]),
("""(define combine (lambda (f)
(lambda (x y)
(if (null? x) (quote ())
(f (list (car x) (car y))
((combine f) (cdr x) (cdr y)))))))""", None),
(lambda (x y)
(if (null? x) (quote ())
(f (list (car x) (car y))
((combine f) (cdr x) (cdr y)))))))""", None),
("(define zip (combine cons))", None),
("(zip (list 1 2 3 4) (list 5 6 7 8))", [[1, 5], [2, 6], [3, 7], [4, 8]]),
("""(define riff-shuffle (lambda (deck) (begin
(define take (lambda (n seq) (if (<= n 0) (quote ()) (cons (car seq) (take (- n 1) (cdr seq))))))
(define drop (lambda (n seq) (if (<= n 0) seq (drop (- n 1) (cdr seq)))))
(define mid (lambda (seq) (/ (length seq) 2)))
((combine append) (take (mid deck) deck) (drop (mid deck) deck)))))""", None),
("""(define riff-shuffle (lambda (deck)
(begin
(define take (lambda (n seq) (if (<= n 0) (quote ()) (cons (car seq) (take (- n 1) (cdr seq))))))
(define drop (lambda (n seq) (if (<= n 0) seq (drop (- n 1) (cdr seq)))))
(define mid (lambda (seq) (/ (length seq) 2)))
((combine append) (take (mid deck) deck) (drop (mid deck) deck)))))""", None),
("(riff-shuffle (list 1 2 3 4 5 6 7 8))", [1, 5, 2, 6, 3, 7, 4, 8]),
("((repeat riff-shuffle) (list 1 2 3 4 5 6 7 8))", [1, 3, 5, 7, 2, 4, 6, 8]),
("(riff-shuffle (riff-shuffle (riff-shuffle (list 1 2 3 4 5 6 7 8))))", [1,2,3,4,5,6,7,8]),

29
18-context-mngr/lispy/py3.9/lis_test.py
View File

@ -14,30 +14,35 @@ ENV_FOR_FIRST_TEST = standard_env()
("(+ (* 2 100) (* 1 10))", 210),
("(if (> 6 5) (+ 1 1) (+ 2 2))", 2),
("(if (< 6 5) (+ 1 1) (+ 2 2))", 4),
("(define x 3)", None), ("x", 3), ("(+ x x)", 6),
("(define x 3)", None),
("x", 3),
("(+ x x)", 6),
("((lambda (x) (+ x x)) 5)", 10),
("(define twice (lambda (x) (* 2 x)))", None), ("(twice 5)", 10),
("(define twice (lambda (x) (* 2 x)))", None),
("(twice 5)", 10),
("(define compose (lambda (f g) (lambda (x) (f (g x)))))", None),
("((compose list twice) 5)", [10]),
("(define repeat (lambda (f) (compose f f)))", None),
("((repeat twice) 5)", 20), ("((repeat (repeat twice)) 5)", 80),
("((repeat twice) 5)", 20),
("((repeat (repeat twice)) 5)", 80),
("(define fact (lambda (n) (if (<= n 1) 1 (* n (fact (- n 1))))))", None),
("(fact 3)", 6),
("(fact 50)", 30414093201713378043612608166064768844377641568960512000000000000),
("(define abs (lambda (n) ((if (> n 0) + -) 0 n)))", None),
("(list (abs -3) (abs 0) (abs 3))", [3, 0, 3]),
("""(define combine (lambda (f)
(lambda (x y)
(if (null? x) (quote ())
(f (list (car x) (car y))
((combine f) (cdr x) (cdr y)))))))""", None),
(lambda (x y)
(if (null? x) (quote ())
(f (list (car x) (car y))
((combine f) (cdr x) (cdr y)))))))""", None),
("(define zip (combine cons))", None),
("(zip (list 1 2 3 4) (list 5 6 7 8))", [[1, 5], [2, 6], [3, 7], [4, 8]]),
("""(define riff-shuffle (lambda (deck) (begin
(define take (lambda (n seq) (if (<= n 0) (quote ()) (cons (car seq) (take (- n 1) (cdr seq))))))
(define drop (lambda (n seq) (if (<= n 0) seq (drop (- n 1) (cdr seq)))))
(define mid (lambda (seq) (/ (length seq) 2)))
((combine append) (take (mid deck) deck) (drop (mid deck) deck)))))""", None),
("""(define riff-shuffle (lambda (deck)
(begin
(define take (lambda (n seq) (if (<= n 0) (quote ()) (cons (car seq) (take (- n 1) (cdr seq))))))
(define drop (lambda (n seq) (if (<= n 0) seq (drop (- n 1) (cdr seq)))))
(define mid (lambda (seq) (/ (length seq) 2)))
((combine append) (take (mid deck) deck) (drop (mid deck) deck)))))""", None),
("(riff-shuffle (list 1 2 3 4 5 6 7 8))", [1, 5, 2, 6, 3, 7, 4, 8]),
("((repeat riff-shuffle) (list 1 2 3 4 5 6 7 8))", [1, 3, 5, 7, 2, 4, 6, 8]),
("(riff-shuffle (riff-shuffle (riff-shuffle (list 1 2 3 4 5 6 7 8))))", [1,2,3,4,5,6,7,8]),