J. S. Choi js-choi

💭

I may be slow to respond.

Board-certified physician-scientist of internal medicine and clinical informatics at the University of Utah. Also in @tc39.

js-choi / Macro expansion of defmaker simplified.clj

Created September 10, 2010 01:10

	(let*
	[maker-var__35822__auto__
	(clojure.core/defn
	edu.arizona.fnparse.hound/validate
	"Creates a validating rule.\n \n A convenience function. Returns a new rule that\n acts like the given `rule`, but also validates\n `rule`'s products with the given predicate.\n Basically just a shortcut for `for` and `when`."
	{:no-memoize? true,
	:success
	"When `rule` succeeds and its product fulfills `(pred product)`.",
	:product "`rule`'s product.",
	:consumes "What `rule` consumes."}

js-choi / Simplified problem code.

Created September 10, 2010 01:07

	(defn named-rule-maker [rule-making-fn rule-type-kw]
	(fn named-rule-maker [& args]
	(NamedRule. (delay (apply-seq rule-making-fn args)) rule-type-kw)))

	(defmacro general-defmaker [def-form description rule-type-kw fn-name & forms]
	`(let [maker-var# (~def-form ~fn-name ~@forms)]
	(alter-var-root maker-var# named-rule-maker ~rule-type-kw) ; Commenting this out prevents the error.
	maker-var#))

js-choi / Macro expansion of delay error

Created September 10, 2010 01:00

	ser=> (require '[edu.arizona.fnparse [core :as c] [hound :as h]] :reload)
	java.lang.RuntimeException: Can't embed object in code, maybe print-dup not defined: clojure.lang.Delay@65f0518c (hound.clj:445)
	(let*
	[maker-var__35822__auto__
	(clojure.core/defn
	edu.arizona.fnparse.hound/validate
	"Creates a validating rule.\n \n A convenience function. Returns a new rule that\n acts like the given `rule`, but also validates\n `rule`'s products with the given predicate.\n Basically just a shortcut for `for` and `when`."
	{:no-memoize? true,
	:success
	"When `rule` succeeds and its product fulfills `(pred product)`.",

js-choi / Hound delay stacktrace

Created September 10, 2010 00:25


	clojure.lang.Compiler$CompilerException: java.lang.RuntimeException: Can't embed object in code, maybe print-dup not defined: clojure.lang.Delay@41dee0d7 (hound.clj:427)
	at clojure.lang.Compiler.analyzeSeq (Compiler.java:5376)
	clojure.lang.Compiler.analyze (Compiler.java:5190)
	clojure.lang.Compiler.analyzeSeq (Compiler.java:5357)
	clojure.lang.Compiler.analyze (Compiler.java:5190)
	clojure.lang.Compiler.analyze (Compiler.java:5151)
	clojure.lang.Compiler$HostExpr$Parser.parse (Compiler.java:798)
	clojure.lang.Compiler.analyzeSeq (Compiler.java:5369)
	clojure.lang.Compiler.analyze (Compiler.java:5190)

js-choi / leiningen-problem.txt

Created May 12, 2010 06:14

	bash> lein self-install
	Downloading Leiningen now...
	% Total % Received % Xferd Average Speed Time Time Time Current
	Dload Upload Total Spent Left Speed
	100 8076k 100 8076k 0 0 1716k 0 0:00:04 0:00:04 --:--:-- 2535k

	bash> lein help
	WARNING: reader macro ^ is deprecated; use meta instead
	Exception in thread "main" java.lang.RuntimeException: java.lang.ClassCastException: clojure.lang.Cons cannot be cast to clojure.lang.Named (help.clj:5)
	at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:2780)