I tried to migrate swank-clojure to lazy branch rev1282. Here are
steps I did.
1) search and replace rest to next
2) search and replace seq? to sequence?
3) change lazy-cons to lazy-seq following the recipe
4) fixed if LazySeq exceptions
see attached diff at the end.
Code loads fine. However, I got below error as soon as emacs slime-
connect to swank server.
The failing code occurred in eval form read from emacs connection. In
jswat debugger, I can see form.toString() in
clojure.lang.Compiler.eval frame as "(#'swank.commands.contrib/swank-
require (quote (:swank-repl ...)))". I even cut & pasted it to plain
repl and it ran fine. However, browsing object shows form.more() is a
clojure.core$map_xxx$fn_xxx, which looks like a lazy-seq closure.
What could be wrong here?
clojure.lang.PersistentList
[Thrown class java.lang.ClassCastException]
Restarts:
0: [ABORT] Return to SLIME's top level.
Backtrace:
0: swank.commands.contrib$eval__1128.<clinit>(Unknown Source)
1: sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
2: sun.reflect.NativeConstructorAccessorImpl.newInstance
(NativeConstructorAccessorImpl.java:39)
3: sun.reflect.DelegatingConstructorAccessorImpl.newInstance
(DelegatingConstructorAccessorImpl.java:27)
4: java.lang.reflect.Constructor.newInstance(Constructor.java:494)
5: java.lang.Class.newInstance0(Class.java:350)
6: java.lang.Class.newInstance(Class.java:303)
7: clojure.lang.Compiler$FnExpr.eval(Compiler.java:3263)
8: clojure.lang.Compiler.eval(Compiler.java:4209)
9: clojure.core$eval__3811.invoke(core.clj:1695)
10: swank.core$eval_in_emacs_package__272.invoke(core.clj:55)
11: swank.core$eval_for_emacs__346.invoke(core.clj:123)
12: clojure.lang.Var.invoke(Var.java:344)
13: clojure.lang.AFn.applyToHelper(AFn.java:179)
14: clojure.lang.Var.applyTo(Var.java:453)
15: clojure.core$apply__3084.doInvoke(core.clj:410)
16: clojure.lang.RestFn.invoke(RestFn.java:428)
17: swank.core$eval_from_control__275.invoke(core.clj:62)
18: swank.core$spawn_worker_thread__369$fn__397$fn__399.invoke
(core.clj:157)
19: clojure.lang.AFn.applyToHelper(AFn.java:171)
20: clojure.lang.AFn.applyTo(AFn.java:164)
21: clojure.core$apply__3084.doInvoke(core.clj:410)
22: clojure.lang.RestFn.invoke(RestFn.java:428)
23: swank.core$spawn_worker_thread__369$fn__397.doInvoke(core.clj:
153)
24: clojure.lang.RestFn.invoke(RestFn.java:402)
25: clojure.lang.AFn.run(AFn.java:37)
26: java.lang.Thread.run(Thread.java:613)
thanks,
- Feng
diff --git a/swank/commands/basic.clj b/swank/commands/basic.clj
index 79d4354..8072d5b 100644
--- a/swank/commands/basic.clj
+++ b/swank/commands/basic.clj
@@ -98,8 +98,9 @@
:short-message ~(.toString t)))
(defn- exception-causes [#^Throwable t]
- (lazy-cons t (when-let [cause (.getCause t)]
- (exception-causes cause))))
+ (lazy-seq
+ (cons t (when-let [cause (.getCause t)]
+ (exception-causes cause)))))
(defn- compile-file-for-emacs*
"Compiles a file for emacs. Because clojure doesn't compile, this
is
diff --git a/swank/commands/contrib.clj b/swank/commands/contrib.clj
index 6c0ed07..2185efd 100644
--- a/swank/commands/contrib.clj
+++ b/swank/commands/contrib.clj
@@ -3,7 +3,7 @@
(defslimefn swank-require [keys]
(binding [*ns* (find-ns 'swank.commands.contrib)]
- (doseq [k (if (seq? keys) keys (list keys))]
+ (doseq [k (if (sequence? keys) keys (list keys))]
(try
(require (symbol (str "swank.commands.contrib." (name k))))
- (catch java.io.FileNotFoundException fne nil)))))
\ No newline at end of file
+ (catch java.io.FileNotFoundException fne nil)))))
diff --git a/swank/commands/contrib/swank_arglists.clj b/swank/
commands/contrib/swank_arglists.clj
index 4a87d89..e7a6cd9 100644
--- a/swank/commands/contrib/swank_arglists.clj
+++ b/swank/commands/contrib/swank_arglists.clj
@@ -9,8 +9,8 @@
print-lines]} (apply hash-map options)]
;; Yeah, I'm lazy -- I'll flesh this out later
(if (and raw-specs
- (seq? raw-specs)
- (seq? (first raw-specs)))
+ (sequence? raw-specs)
+ (sequence? (first raw-specs)))
((slime-fn 'operator-arglist) (ffirst raw-specs) *current-
package*)
nil)))
diff --git a/swank/commands/indent.clj b/swank/commands/indent.clj
index 6248399..af58ce3 100644
--- a/swank/commands/indent.clj
+++ b/swank/commands/indent.clj
@@ -33,10 +33,7 @@
(filter (comp var? val) (mapcat ns-map nss)))))
(defn- every-other [coll]
- (when coll
- (lazy-cons
- (first coll)
- (every-other (drop 2 coll)))))
+ (take-nth 2 coll))
(defn- update-indentation-delta
"Update the cache and return the changes in a (symbol '. indent)
list.
@@ -53,15 +50,15 @@
(let [vars (filter (comp var? val) (mapcat ns-map
nss))]
(mapcat in-cache? vars)))]
(if force
- (when-let [updates (considerations-for (all-ns))]
+ (when-let [updates (seq (considerations-for (all-ns)))]
(dosync (apply alter cache assoc updates))
- (every-other (rest updates)))
+ (every-other (next updates)))
(let [ns (maybe-ns *current-package*)
in-ns? (fn [[sym var]] (and (var? var) (= ns ((meta
var) :ns))))]
(when ns
- (when-let [updates (filter identity (considerations-
for (list ns)))]
+ (when-let [updates (seq (filter identity
(considerations-for (list ns))))]
(dosync (apply alter cache assoc updates))
- (every-other (rest updates))))))))))
+ (every-other (next updates))))))))))
(defn- perform-indentation-update
"Update the indentation cache in connection and update emacs.
@@ -71,7 +68,7 @@
(let [delta (update-indentation-delta cache force)]
(dosync
(ref-set (conn :indent-cache-pkg) (hash (all-ns)))
- (when delta
+ (when (seq delta)
(send-to-emacs `(:indentation-update ~delta))))))))
(defn- sync-indentation-to-emacs
diff --git a/swank/commands/inspector.clj b/swank/commands/
inspector.clj
index a91f724..80f66f8 100644
--- a/swank/commands/inspector.clj
+++ b/swank/commands/inspector.clj
@@ -72,7 +72,7 @@
(vector? obj) :vector
(var? obj) :var
(string? obj) :string
- (seq? obj) :seq
+ (sequence? obj) :seq
(instance? Class obj) :class
(instance? clojure.lang.Namespace obj) :namespace)))
@@ -189,7 +189,7 @@
(fn spec-value [val]
(cond
(string? val) val
- (seq? val) (spec-seq val)))]
+ (sequence? val) (spec-seq val)))]
(map spec-value specs)))
;; Works for infinite sequences, but it lies about length. Luckily,
emacs doesn't
@@ -258,7 +258,7 @@
(defslimefn inspector-pop []
(with-emacs-package
(cond
- (rest @*inspector-stack*)
+ (next @*inspector-stack*)
(inspect-object
(dosync
(ref-pop *inspector-stack*)
diff --git a/swank/core.clj b/swank/core.clj
index 260cdd7..87c6623 100644
--- a/swank/core.clj
+++ b/swank/core.clj
@@ -59,7 +59,7 @@
"Blocks for a mbox message from the control thread and executes it
when received. The mbox message is expected to be a slime-fn."
([] (let [form (mb/receive (current-thread))]
- (apply (ns-resolve *ns* (first form)) (rest form)))))
+ (apply (ns-resolve *ns* (first form)) (next form)))))
(defn eval-loop
"A loop which continuosly reads actions from the control thread and
@@ -67,8 +67,9 @@
([] (continuously (eval-from-control))))
(defn- exception-causes [#^Throwable t]
- (lazy-cons t (when-let [cause (.getCause t)]
- (exception-causes cause))))
+ (lazy-seq
+ (cons t (when-let [cause (.getCause t)]
+ (exception-causes cause)))))
(defn- debug-quit-exception? [t]
(some #(identical? *debug-quit-exception* %) (exception-causes t)))
@@ -110,7 +111,7 @@
(send-to-emacs (list :debug-return (current-thread) level
nil))))))
(defn doall-seq [coll]
- (if (seq? coll)
+ (if (sequence? coll)
(doall coll)
coll))
@@ -118,7 +119,7 @@
(try
(binding [*current-package* buffer-package]
(if-let [f (slime-fn (first form))]
- (let [form (cons f (rest form))
+ (let [form (cons f (next form))
result (doall-seq (eval-in-emacs-package form))]
(run-hook *pre-reply-hook*)
(send-to-emacs `(:return ~(thread-name (current-thread))
(:ok ~result) ~id)))
diff --git a/swank/core/protocol.clj b/swank/core/protocol.clj
index 35dfa43..d8bf4c4 100644
--- a/swank/core/protocol.clj
+++ b/swank/core/protocol.clj
@@ -45,7 +45,7 @@
(let [len (hex->num (read-chars 6 rdr))
msg (read-chars len rdr)
form (read-from-string (fix-namespace msg))]
- (if (seq? form)
+ (if (sequence? form)
(deep-replace {'t true} form)
form))))
diff --git a/swank/util.clj b/swank/util.clj
index 3ba2ecc..fcb9c22 100644
--- a/swank/util.clj
+++ b/swank/util.clj
@@ -31,10 +31,10 @@
([item coll] (position item coll 0))
([item coll start]
(loop [coll (drop start coll), i start]
- (when coll
+ (when (seq coll)
(if (= (first coll) item)
i
- (recur (rest coll) (inc i))))))
+ (recur (next coll) (inc i))))))
{:tag Integer})
(defn categorize-by
@@ -54,7 +54,7 @@
(defn deep-replace [smap coll]
- (map #(if (or (seq? %) (vector? %))
+ (map #(if (or (sequence? %) (vector? %))
(deep-replace smap %)
%)
(replace smap coll)))
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