python Q1: WWSD: Macros One thing to keep in mind when doing this question, builtins get rendered as so scm> + #[+] scm> list #[list] If evaluating an expression causes an error, type SchemeError. If nothing is displayed, type Nothing. scm> + ______ scm> list ______ scm> (define-macro (f x) (car x)) ______ scm> (f (2 3 4)) ; type SchemeError for error, or Nothing for nothing ______ scm> (f (+ 2 3)) ______ scm> (define x 2000) ______ scm> (f (x y z)) ______ scm> (f (list 2 3 4)) ______ scm> (f (quote (2 3 4))) ______ scm> (define quote 7000) ______ scm> (f (quote (2 3 4))) ______ scm> (define-macro (g x) (+ x 2)) ______ scm> (g 2) ______ scm> (g (+ 2 3)) ______ scm> (define-macro (h x) (list '+ x 2)) ______ scm> (h (+ 2 3)) ______ scm> (define-macro (if-else-5 condition consequent) `(if ,condition ,consequent 5)) ______ scm> (if-else-5 #t 2) ______ scm> (if-else-5 #f 3) ______ scm> (if-else-5 #t (/ 1 0)) ______ scm> (if-else-5 #f (/ 1 0)) ______ scm> (if-else-5 (= 1 1) 2) ______

python Q1: WWSD: Macros One thing to keep in mind when doing this question, builtins get rendered as so scm> + #[+] scm> list #[list] If evaluating an expression causes an error, type SchemeError. If nothing is displayed, type Nothing. scm> + scm> list scm> (define-macro (f x) (car x)) scm> (f (2 3 4)) ; type SchemeError for error, or Nothing for nothing scm> (f (+ 2 3)) scm> (define x 2000) scm> (f (x y z)) scm> (f (list 2 3 4)) scm> (f (quote (2 3 4))) scm> (define quote 7000) scm> (f (quote (2 3 4))) scm> (define-macro (g x) (+ x 2)) scm> (g 2) scm> (g (+ 2 3)) scm> (define-macro (h x) (list '+ x 2)) scm> (h (+ 2 3)) scm> (define-macro (if-else-5 condition consequent) `(if ,condition ,consequent 5)) scm> (if-else-5 #t 2) scm> (if-else-5 #f 3) scm> (if-else-5 #t (/ 1 0)) scm> (if-else-5 #f (/ 1 0)) scm> (if-else-5 (= 1 1) 2)

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter7: Arrays

Section7.5: Case Studies

Problem 3E

See similar textbooks

Q1: WWSD: Macros

One thing to keep in mind when doing this question, builtins get rendered as so

scm> +

#[+]

scm> list

#[list]

If evaluating an expression causes an error, type SchemeError. If nothing is displayed, type Nothing.

scm> +

______

scm> list

______

scm> (define-macro (f x) (car x))

______

scm> (f (2 3 4)) ; type SchemeError for error, or Nothing for nothing

______

scm> (f (+ 2 3))

______

scm> (define x 2000)

______

scm> (f (x y z))

______

scm> (f (list 2 3 4))

______

scm> (f (quote (2 3 4)))

______

scm> (define quote 7000)

______

scm> (f (quote (2 3 4)))

______

scm> (define-macro (g x) (+ x 2))

______

scm> (g 2)

______

scm> (g (+ 2 3))

______

scm> (define-macro (h x) (list '+ x 2))

______

scm> (h (+ 2 3))

______

scm> (define-macro (if-else-5 condition consequent) `(if ,condition ,consequent 5))

______

scm> (if-else-5 #t 2)

______

scm> (if-else-5 #f 3)

______

scm> (if-else-5 #t (/ 1 0))

______

scm> (if-else-5 #f (/ 1 0))

______

scm> (if-else-5 (= 1 1) 2)

______

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