X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=assignment_3_evaluator.mdwn;h=28693f436d9360d5603354a48ecf498e32633e8f;hp=eb3c18b6d52457d4f4402e53e0c9b06e2d34a4d4;hb=1859a8c4b42139e3a557ec44dd8edd1e1acb71f9;hpb=2a61846bbb48e29385fc7639a47c76f82d70bb18

diff --git a/assignment_3_evaluator.mdwn b/assignment_3_evaluator.mdwn
index eb3c18b6..28693f43 100644
--- a/assignment_3_evaluator.mdwn
+++ b/assignment_3_evaluator.mdwn
@@ -6,23 +6,24 @@ let true = \x y. x in
 let false = \x y. y in
 let and = \l r. l (r true false) false in
 let or = \l r. l true r in
-let make_pair = \f s g. g f s in
-let get_fst = true in
-let get_snd = false in
-let empty = make_pair true junk in
-let isempty = \x. x get_fst in
-let make_list = \h t. make_pair false (make_pair h t) in
-let head = \l. isempty l err (l get_snd get_fst) in
-let tail = \l. isempty l err (l get_snd get_snd) in
+;
+let make\_pair = \f s g. g f s in
+let get\_fst = true in
+let get\_snd = false in
+let empty = make\_pair true junk in
+let isempty = \x. x get\_fst in
+let make\_list = \h t. make\_pair false (make\_pair h t) in
+let head = \l. isempty l err (l get\_snd get\_fst) in
+let tail = \l. isempty l err (l get\_snd get\_snd) in
 ;
 ; a list of numbers to experiment on
-let mylist = make_list 1 (make_list 2 (make_list 3 empty)) in
+let mylist = make\_list 1 (make\_list 2 (make\_list 3 empty)) in
 ;
 ; church numerals
 let iszero = \n. n (\x. false) true in
 let succ = \n s z. s (n s z) in
 let mul = \m n s. m (n s) in
-let pred = (\shift n. n shift (make_pair 0 0) get_snd) (\p. p (\x y. make_pair (succ x) x))  in
+let pred = (\shift n. n shift (make\_pair 0 0) get\_snd) (\p. p (\x y. make\_pair (succ x) x))  in
 let leq = \m n. iszero(n pred m) in
 let eq = \m n. and (leq m n)(leq n m) in
 ;
@@ -32,12 +33,12 @@ let Y = \f. (\h. f (h h)) (\h. f (h h)) in
 let length = Y (\length l. isempty l 0 (succ (length (tail l)))) in
 ;
 ; synonyms
-let makePair = make_pair in
-let fst = get_fst in
-let snd = get_snd in
+let makePair = make\_pair in
+let fst = get\_fst in
+let snd = get\_snd in
 let nil = empty in
 let isNil = isempty in
-let makeList = make_list in
+let makeList = make\_list in
 let isZero = iszero in
 let mult = mul in
 ;
@@ -60,6 +61,7 @@ let tc = (make_list t1 (make_list t23 empty)) in
 ;
 length (tail mylist)
 </textarea>
+
 <input id="PARSE" value="Normalize" type="button">
 <input id="ETA" type="checkbox">do eta-reductions too
 <noscript><p>You may not see it because you have JavaScript turned off. Uffff!</p></noscript>