How get function name in body?
How get function name in body? (defn add [a b] ;; how get "add" here? (+ a b)) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/clojure/5c533ccf-ec0b-4c84-b759-851f1fe3b3can%40googlegroups.com.
Re: How get function name in body?
Well, it seems like it should be possible. At the end of the defn macro, metadata is attached to a function, so you can see the name with: ``` (meta #'my.ns/add) ``` And you could do this inside the function: ``` (defn add [a b] (let [name (:name (meta #'add))] (str a b name))) ``` But that can't be what you want. The thing is, the actual function body doesn't know that it's being bound to the symbol "add" and making it aware would seem to contravene a number of league bylaws. That is to say, the macro "defn" attaches the meta-information to the symbol #add, not to the code that follows. You could certainly make your own macro to make the bound variable name visible to the body of the code, but I'm not sure you can do that with the built-in defn. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/clojure/CAJAnwPmWK82nS1udL7MvVeDpa1rQHQ3c34G37WWasm%3D7DieroA%40mail.gmail.com.
Re: How get function name in body?
Consider that:
(defn add [a b] (+ a b))
is expanded to (something like):
(def add (fn [a b] (+ a b)))
So the actual code that runs is an anonymous function, which is bound to
the (global) var #'add -- the function itself has no name.
dev=> (*macroexpand* '(*defn* *add* [a b] (*+* a b)))
(def add (clojure.core/fn ([a b] (+ a b
dev=> (*defn* *add* [a b] (*+* a b))
#'dev/add
dev=> add
#object[dev$add 0x72f91c91 "dev$add@72f91c91"]
So the value of add is an object, with type dev$add, a class that
implements a bunch of things including clojure.lang.IFn and
java.lang.Runnable and java.util.concurrent.Callable etc.
The "name" of function is hard to get to, inside a function because of that.
One way to figure that out at runtime is to dig into the stack, which you
can get at by creating an exception and inspecting it: be aware that this
is an expensive operation!
dev=> (*defn* *add* [a b]
#_=> (*let* [frame (*first* (*:trace* (*Throwable->map* (*ex-info* *""*
{}]
#_=> (*println* (demunge (*name* (*first* frame
#_=> (*+* a b)))
#'dev/add
dev=> (add 1 2)
dev/add
3
dev=>
demunge is what turns Clojure's generated classnames back into readable
source names.
The more important question is: why do you want the function's name inside
the body?
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- https://corfield.org/
World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
"Perfection is the enemy of the good."
-- Gustave Flaubert, French realist novelist (1821-1880)
On Wed, Apr 28, 2021 at 6:35 AM damon kwok wrote:
>
> How get function name in body?
>
> (defn add [a b]
> ;; how get "add" here?
> (+ a b))
>
> --
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> .
>
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Re: How get function name in body?
> De: "Sean Corfield"
> À: "clojure"
> Envoyé: Jeudi 29 Avril 2021 01:26:34
> Objet: Re: How get function name in body?
> Consider that:
> (defn add [a b] (+ a b))
> is expanded to (something like):
> (def add (fn [a b] (+ a b)))
> So the actual code that runs is an anonymous function, which is bound to the
> (global) var #'add -- the function itself has no name.
> dev=> ( macroexpand '( defn add [a b] ( + a b)))
> (def add (clojure.core/fn ([a b] (+ a b
> dev=> ( defn add [a b] ( + a b))
> #'dev/add
> dev=> add
> #object[dev$add 0x72f91c91 "dev$add@72f91c91"]
> So the value of add is an object, with type dev$add, a class that implements a
> bunch of things including clojure.lang.IFn and java.lang.Runnable and
> java.util.concurrent.Callable etc.
> The "name" of function is hard to get to, inside a function because of that.
> One way to figure that out at runtime is to dig into the stack, which you can
> get at by creating an exception and inspecting it: be aware that this is an
> expensive operation!
> dev=> ( defn add [a b]
> #_=> ( let [frame ( first ( :trace ( Throwable->map ( ex-info "" {}]
> #_=> ( println (demunge ( name ( first frame
> #_=> ( + a b)))
> #'dev/add
> dev=> (add 1 2)
> dev/add
> 3
> dev=>
> demunge is what turns Clojure's generated classnames back into readable source
> names.
Instead of using the stacktrace of java.lang.Throwable, you can use
StackWalker.getCallerClass() if you are using a jdk 9+
> The more important question is: why do you want the function's name inside the
> body?
> --
> Sean A Corfield -- (904) 302-SEAN
> An Architect's View -- [ https://corfield.org/ | https://corfield.org/ ]
> World Singles Networks, LLC. -- [ https://worldsinglesnetworks.com/ |
> https://worldsinglesnetworks.com/ ]
> "Perfection is the enemy of the good."
> -- Gustave Flaubert, French realist novelist (1821-1880)
Rémi
[1] [
https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/StackWalker.html#getCallerClass()
|
https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/StackWalker.html#getCallerClass()
]
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Re: How get function name in body?
That's definitely nicer:
dev=> (*defn* *add* [a b]
#_=> (*println* (demunge (*.getName* (*.getCallerClass* (
*java.lang.StackWalker*/getInstance *java.lang.StackWalker$Option*
/RETAIN_CLASS_REFERENCE)
#_=> (*+* a b))
#'dev/add
dev=> (add 1 2)
dev/add
3
dev=>
Thanks, Rémi!
On Thu, Apr 29, 2021 at 12:08 PM Remi Forax wrote:
>
>
> --
>
> *De: *"Sean Corfield"
> *À: *"clojure"
> *Envoyé: *Jeudi 29 Avril 2021 01:26:34
> *Objet: *Re: How get function name in body?
>
> Consider that:
>
> (defn add [a b] (+ a b))
>
> is expanded to (something like):
>
> (def add (fn [a b] (+ a b)))
>
> So the actual code that runs is an anonymous function, which is bound to
> the (global) var #'add -- the function itself has no name.
>
> dev=> (*macroexpand* '(*defn**add* [a b] (*+* a b)))
>
> (def add (clojure.core/fn ([a b] (+ a b
>
> dev=> (*defn**add* [a b] (*+* a b))
>
> #'dev/add
>
> dev=> add
>
> #object[dev$add 0x72f91c91 "dev$add@72f91c91"]
>
> So the value of add is an object, with type dev$add, a class that
> implements a bunch of things including clojure.lang.IFn and
> java.lang.Runnable and java.util.concurrent.Callable etc.
>
> The "name" of function is hard to get to, inside a function because of
> that.
>
> One way to figure that out at runtime is to dig into the stack, which you
> can get at by creating an exception and inspecting it: be aware that this
> is an expensive operation!
>
> dev=> (*defn**add* [a b]
>
> #_=> (*let* [frame (*first* (*:trace* (*Throwable->map* (*ex-info**""*
> {}]
>
> #_=> (*println* (demunge (*name* (*first* frame
>
> #_=> (*+* a b)))
>
> #'dev/add
>
> dev=> (add 1 2)
>
> dev/add
>
> 3
>
> dev=>
>
> demunge is what turns Clojure's generated classnames back into readable
> source names.
>
>
> Instead of using the stacktrace of java.lang.Throwable, you can use
> StackWalker.getCallerClass() if you are using a jdk 9+
>
>
> The more important question is: why do you want the function's name inside
> the body?
> --
> Sean A Corfield -- (904) 302-SEAN
> An Architect's View -- https://corfield.org/
> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
>
> "Perfection is the enemy of the good."
> -- Gustave Flaubert, French realist novelist (1821-1880)
>
>
> Rémi
>
> [1]
> https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/StackWalker.html#getCallerClass()
>
> --
> You received this message because you are subscribed to the Google
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> Note that posts from new members are moderated - please be patient with
> your first post.
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> clojure+unsubscr...@googlegroups.com
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> ---
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> <https://groups.google.com/d/msgid/clojure/843762456.638578.1619723272421.JavaMail.zimbra%40u-pem.fr?utm_medium=email&utm_source=footer>
> .
>
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- https://corfield.org/
World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
"Perfection is the enemy of the good."
-- Gustave Flaubert, French realist novelist (1821-1880)
--
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Re: How get function name in body?
Clojure 1.10.1
(defn haha []
(println (demunge (.getName (.getCallerClass
(java.lang.StackWalker/getInstance
java.lang.StackWalker$Option/RETAIN_CLASS_REFERENCE))
Syntax error compiling at (REPL:1:23).
Unable to resolve symbol: demunge in this context
在2021年4月30日星期五 UTC+8 上午4:35:45 写道：
> That's definitely nicer:
>
> dev=> (*defn* *add* [a b]
>
> #_=> (*println* (demunge (*.getName* (*.getCallerClass* (
> *java.lang.StackWalker*/getInstance *java.lang.StackWalker$Option*
> /RETAIN_CLASS_REFERENCE)
>
> #_=> (*+* a b))
>
> #'dev/add
>
> dev=> (add 1 2)
>
> dev/add
>
> 3
>
> dev=>
>
> Thanks, Rémi!
>
> On Thu, Apr 29, 2021 at 12:08 PM Remi Forax wrote:
>
>>
>>
>> ----------
>>
>> *De: *"Sean Corfield"
>> *À: *"clojure"
>> *Envoyé: *Jeudi 29 Avril 2021 01:26:34
>> *Objet: *Re: How get function name in body?
>>
>> Consider that:
>>
>> (defn add [a b] (+ a b))
>>
>> is expanded to (something like):
>>
>> (def add (fn [a b] (+ a b)))
>>
>> So the actual code that runs is an anonymous function, which is bound to
>> the (global) var #'add -- the function itself has no name.
>>
>> dev=> (*macroexpand* '(*defn**add* [a b] (*+* a b)))
>>
>> (def add (clojure.core/fn ([a b] (+ a b
>>
>> dev=> (*defn**add* [a b] (*+* a b))
>>
>> #'dev/add
>>
>> dev=> add
>>
>> #object[dev$add 0x72f91c91 "dev$add@72f91c91"]
>>
>> So the value of add is an object, with type dev$add, a class that
>> implements a bunch of things including clojure.lang.IFn and
>> java.lang.Runnable and java.util.concurrent.Callable etc.
>>
>> The "name" of function is hard to get to, inside a function because of
>> that.
>>
>> One way to figure that out at runtime is to dig into the stack, which you
>> can get at by creating an exception and inspecting it: be aware that this
>> is an expensive operation!
>>
>> dev=> (*defn**add* [a b]
>>
>> #_=> (*let* [frame (*first* (*:trace* (*Throwable->map* (*ex-info**""*
>> {}]
>>
>> #_=> (*println* (demunge (*name* (*first* frame
>>
>> #_=> (*+* a b)))
>>
>> #'dev/add
>>
>> dev=> (add 1 2)
>>
>> dev/add
>>
>> 3
>>
>> dev=>
>>
>> demunge is what turns Clojure's generated classnames back into readable
>> source names.
>>
>>
>> Instead of using the stacktrace of java.lang.Throwable, you can use
>> StackWalker.getCallerClass() if you are using a jdk 9+
>>
>>
>> The more important question is: why do you want the function's name
>> inside the body?
>> --
>> Sean A Corfield -- (904) 302-SEAN
>> An Architect's View -- https://corfield.org/
>> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
>>
>> "Perfection is the enemy of the good."
>> -- Gustave Flaubert, French realist novelist (1821-1880)
>>
>>
>> Rémi
>>
>> [1]
>> https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/StackWalker.html#getCallerClass()
>>
>> --
>> You received this message because you are subscribed to the Google
>> Groups "Clojure" group.
>> To post to this group, send email to clo...@googlegroups.com
>> Note that posts from new members are moderated - please be patient with
>> your first post.
>> To unsubscribe from this group, send email to
>> clojure+u...@googlegroups.com
>> For more options, visit this group at
>> http://groups.google.com/group/clojure?hl=en
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "Clojure" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to clojure+u...@googlegroups.com.
>>
> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/clojure/843762456.638578.1619723272421.JavaMail.zimbra%40u-pem.fr
>>
>> <https://groups.google.com/d/msgid/clojure/843762456.638578.1619723272421.JavaMail.zimbra%40u-pem.fr?utm_medium=email&utm_source=footer>
>> .
>>
>
>
> --
> Sean A Corfield -- (904) 302-SEAN
> An Architect's View -- https://corfield.org/
> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
>
> "Perfection is the enemy of the good."
> -- Gustave Flaubert, French realist novelist (1821-1880)
>
--
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Re: How get function name in body?
Sorry, it's clojure.repl/demunge so it depends on how you run your REPL and
evaluate code -- in my case, clojure.repl symbols were all referred in. In
your case, you'll need to require clojure.repl and refer it in:
(require '[clojure.repl :refer [demunge])
or make that part of your ns form as:
(:require [clojure.repl :refer [demunge]])
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- https://corfield.org/
World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
"Perfection is the enemy of the good."
-- Gustave Flaubert, French realist novelist (1821-1880)
On Thu, Apr 29, 2021 at 10:27 PM damon kwok wrote:
>
> Clojure 1.10.1
>(defn haha []
>(println (demunge (.getName (.getCallerClass
> (java.lang.StackWalker/getInstance
> java.lang.StackWalker$Option/RETAIN_CLASS_REFERENCE))
> Syntax error compiling at (REPL:1:23).
> Unable to resolve symbol: demunge in this context
> 在2021年4月30日星期五 UTC+8 上午4:35:45 写道：
>
>> That's definitely nicer:
>>
>> dev=> (*defn* *add* [a b]
>>
>> #_=> (*println* (demunge (*.getName* (*.getCallerClass* (
>> *java.lang.StackWalker*/getInstance *java.lang.StackWalker$Option*
>> /RETAIN_CLASS_REFERENCE)
>>
>> #_=> (*+* a b))
>>
>> #'dev/add
>>
>> dev=> (add 1 2)
>>
>> dev/add
>>
>> 3
>>
>> dev=>
>>
>> Thanks, Rémi!
>>
>> On Thu, Apr 29, 2021 at 12:08 PM Remi Forax wrote:
>>
>>>
>>>
>>> --
>>>
>>> *De: *"Sean Corfield"
>>> *À: *"clojure"
>>> *Envoyé: *Jeudi 29 Avril 2021 01:26:34
>>> *Objet: *Re: How get function name in body?
>>>
>>> Consider that:
>>>
>>> (defn add [a b] (+ a b))
>>>
>>> is expanded to (something like):
>>>
>>> (def add (fn [a b] (+ a b)))
>>>
>>> So the actual code that runs is an anonymous function, which is bound to
>>> the (global) var #'add -- the function itself has no name.
>>>
>>> dev=> (*macroexpand* '(*defn**add* [a b] (*+* a b)))
>>>
>>> (def add (clojure.core/fn ([a b] (+ a b
>>>
>>> dev=> (*defn**add* [a b] (*+* a b))
>>>
>>> #'dev/add
>>>
>>> dev=> add
>>>
>>> #object[dev$add 0x72f91c91 "dev$add@72f91c91"]
>>>
>>> So the value of add is an object, with type dev$add, a class that
>>> implements a bunch of things including clojure.lang.IFn and
>>> java.lang.Runnable and java.util.concurrent.Callable etc.
>>>
>>> The "name" of function is hard to get to, inside a function because of
>>> that.
>>>
>>> One way to figure that out at runtime is to dig into the stack, which
>>> you can get at by creating an exception and inspecting it: be aware that
>>> this is an expensive operation!
>>>
>>> dev=> (*defn**add* [a b]
>>>
>>> #_=> (*let* [frame (*first* (*:trace* (*Throwable->map* (*ex-info**""*
>>> {}]
>>>
>>> #_=> (*println* (demunge (*name* (*first* frame
>>>
>>> #_=> (*+* a b)))
>>>
>>> #'dev/add
>>>
>>> dev=> (add 1 2)
>>>
>>> dev/add
>>>
>>> 3
>>>
>>> dev=>
>>>
>>> demunge is what turns Clojure's generated classnames back into readable
>>> source names.
>>>
>>>
>>> Instead of using the stacktrace of java.lang.Throwable, you can use
>>> StackWalker.getCallerClass() if you are using a jdk 9+
>>>
>>>
>>> The more important question is: why do you want the function's name
>>> inside the body?
>>> --
>>> Sean A Corfield -- (904) 302-SEAN
>>> An Architect's View -- https://corfield.org/
>>> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
>>>
>>> "Perfection is the enemy of the good."
>>> -- Gustave Flaubert, French realist novelist (1821-1880)
>>>
>>>
>>> Rémi
>>>
>>> [1]
>>> https://docs.oracle.com/en/java/javase/16/docs/api/java.base/java/lang/StackWalker.html#getCallerClass()
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Clojure" group.
>>> To post to this group, send email to clo...@googlegroups.com
>>> Note that posts from new m
Re: How get function name in body?
there's a handy trick for pulling in the standard repl aliases / refers:
(cmd)user=> clojure.main/repl-requires
[[clojure.repl :refer (source apropos dir pst doc find-doc)]
[clojure.java.javadoc :refer (javadoc)] [clojure.pprint :refer (pp pprint)]]
(ins)user=> (ns foo.bar)
nil
(ins)foo.bar=> (doc fn)
Syntax error compiling at (REPL:1:1).
Unable to resolve symbol: doc in this context
(ins)foo.bar=> (apply require clojure.main/repl-requires)
nil
(cmd)foo.bar=> (doc fn)
-
clojure.core/fn
(fn name? [params*] exprs*)
(fn name? ([params*] exprs*) +)
([& sigs])
Special Form
...
On Thu, Apr 29, 2021 at 10:41 PM Sean Corfield wrote:
> Sorry, it's clojure.repl/demunge so it depends on how you run your REPL
> and evaluate code -- in my case, clojure.repl symbols were all referred in.
> In your case, you'll need to require clojure.repl and refer it in:
>
> (require '[clojure.repl :refer [demunge])
>
> or make that part of your ns form as:
>
> (:require [clojure.repl :refer [demunge]])
>
> --
> Sean A Corfield -- (904) 302-SEAN
> An Architect's View -- https://corfield.org/
> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/
>
> "Perfection is the enemy of the good."
> -- Gustave Flaubert, French realist novelist (1821-1880)
>
> On Thu, Apr 29, 2021 at 10:27 PM damon kwok wrote:
>
>>
>> Clojure 1.10.1
>>(defn haha []
>>(println (demunge (.getName (.getCallerClass
>> (java.lang.StackWalker/getInstance
>> java.lang.StackWalker$Option/RETAIN_CLASS_REFERENCE))
>> Syntax error compiling at (REPL:1:23).
>> Unable to resolve symbol: demunge in this context
>> 在2021年4月30日星期五 UTC+8 上午4:35:45 写道：
>>
>>> That's definitely nicer:
>>>
>>> dev=> (*defn* *add* [a b]
>>>
>>> #_=> (*println* (demunge (*.getName* (*.getCallerClass* (
>>> *java.lang.StackWalker*/getInstance *java.lang.StackWalker$Option*
>>> /RETAIN_CLASS_REFERENCE)
>>>
>>> #_=> (*+* a b))
>>>
>>> #'dev/add
>>>
>>> dev=> (add 1 2)
>>>
>>> dev/add
>>>
>>> 3
>>>
>>> dev=>
>>>
>>> Thanks, Rémi!
>>>
>>> On Thu, Apr 29, 2021 at 12:08 PM Remi Forax wrote:
>>>
>>>>
>>>>
>>>> --
>>>>
>>>> *De: *"Sean Corfield"
>>>> *À: *"clojure"
>>>> *Envoyé: *Jeudi 29 Avril 2021 01:26:34
>>>> *Objet: *Re: How get function name in body?
>>>>
>>>> Consider that:
>>>>
>>>> (defn add [a b] (+ a b))
>>>>
>>>> is expanded to (something like):
>>>>
>>>> (def add (fn [a b] (+ a b)))
>>>>
>>>> So the actual code that runs is an anonymous function, which is bound
>>>> to the (global) var #'add -- the function itself has no name.
>>>>
>>>> dev=> (*macroexpand* '(*defn**add* [a b] (*+* a b)))
>>>>
>>>> (def add (clojure.core/fn ([a b] (+ a b
>>>>
>>>> dev=> (*defn**add* [a b] (*+* a b))
>>>>
>>>> #'dev/add
>>>>
>>>> dev=> add
>>>>
>>>> #object[dev$add 0x72f91c91 "dev$add@72f91c91"]
>>>>
>>>> So the value of add is an object, with type dev$add, a class that
>>>> implements a bunch of things including clojure.lang.IFn and
>>>> java.lang.Runnable and java.util.concurrent.Callable etc.
>>>>
>>>> The "name" of function is hard to get to, inside a function because of
>>>> that.
>>>>
>>>> One way to figure that out at runtime is to dig into the stack, which
>>>> you can get at by creating an exception and inspecting it: be aware that
>>>> this is an expensive operation!
>>>>
>>>> dev=> (*defn**add* [a b]
>>>>
>>>> #_=> (*let* [frame (*first* (*:trace* (*Throwable->map* (*ex-info**""*
>>>> {}]
>>>>
>>>> #_=> (*println* (demunge (*name* (*first* frame
>>>>
>>>> #_=> (*+* a b)))
>>>>
>>>> #'dev/add
>>>>
>>>> dev=> (add 1 2)
>>>>
>>>> dev/add
>>>>
>>>> 3
>>>>
>>>> dev=>
>>>>
>>>> demunge is what turns Clojure's generated classnames
Re: How get function name in body?
That's a useful tip! Thanks On Monday, May 3, 2021 at 11:21:18 AM UTC-4 noise...@gmail.com wrote: > there's a handy trick for pulling in the standard repl aliases / refers: > > (cmd)user=> clojure.main/repl-requires > [[clojure.repl :refer (source apropos dir pst doc find-doc)] > [clojure.java.javadoc :refer (javadoc)] [clojure.pprint :refer (pp pprint)]] > (ins)user=> (ns foo.bar) > nil > (ins)foo.bar=> (doc fn) > Syntax error compiling at (REPL:1:1). > Unable to resolve symbol: doc in this context > (ins)foo.bar=> (apply require clojure.main/repl-requires) > nil > (cmd)foo.bar=> (doc fn) > - > clojure.core/fn > (fn name? [params*] exprs*) > (fn name? ([params*] exprs*) +) > ([& sigs]) > Special Form > ... > > On Thu, Apr 29, 2021 at 10:41 PM Sean Corfield wrote: > >> Sorry, it's clojure.repl/demunge so it depends on how you run your REPL >> and evaluate code -- in my case, clojure.repl symbols were all referred in. >> In your case, you'll need to require clojure.repl and refer it in: >> >> (require '[clojure.repl :refer [demunge]) >> >> or make that part of your ns form as: >> >> (:require [clojure.repl :refer [demunge]]) >> >> -- >> Sean A Corfield -- (904) 302-SEAN >> An Architect's View -- https://corfield.org/ >> World Singles Networks, LLC. -- https://worldsinglesnetworks.com/ >> >> "Perfection is the enemy of the good." >> -- Gustave Flaubert, French realist novelist (1821-1880) >> >> On Thu, Apr 29, 2021 at 10:27 PM damon kwok wrote: >> >>> >>> Clojure 1.10.1 >>>(defn haha [] >>>(println (demunge (.getName (.getCallerClass >>> (java.lang.StackWalker/getInstance >>> java.lang.StackWalker$Option/RETAIN_CLASS_REFERENCE)) >>> Syntax error compiling at (REPL:1:23). >>> Unable to resolve symbol: demunge in this context >>> 在2021年4月30日星期五 UTC+8 上午4:35:45 写道： >>> >>>> That's definitely nicer: >>>> >>>> dev=> (*defn* *add* [a b] >>>> >>>> #_=> (*println* (demunge (*.getName* (*.getCallerClass* ( >>>> *java.lang.StackWalker*/getInstance *java.lang.StackWalker$Option* >>>> /RETAIN_CLASS_REFERENCE) >>>> >>>> #_=> (*+* a b)) >>>> >>>> #'dev/add >>>> >>>> dev=> (add 1 2) >>>> >>>> dev/add >>>> >>>> 3 >>>> >>>> dev=> >>>> >>>> Thanks, Rémi! >>>> >>>> On Thu, Apr 29, 2021 at 12:08 PM Remi Forax wrote: >>>> >>>>> >>>>> >>>>> -- >>>>> >>>>> *De: *"Sean Corfield" >>>>> *À: *"clojure" >>>>> *Envoyé: *Jeudi 29 Avril 2021 01:26:34 >>>>> *Objet: *Re: How get function name in body? >>>>> >>>>> Consider that: >>>>> >>>>> (defn add [a b] (+ a b)) >>>>> >>>>> is expanded to (something like): >>>>> >>>>> (def add (fn [a b] (+ a b))) >>>>> >>>>> So the actual code that runs is an anonymous function, which is bound >>>>> to the (global) var #'add -- the function itself has no name. >>>>> >>>>> dev=> (*macroexpand* '(*defn**add* [a b] (*+* a b))) >>>>> >>>>> (def add (clojure.core/fn ([a b] (+ a b >>>>> >>>>> dev=> (*defn**add* [a b] (*+* a b)) >>>>> >>>>> #'dev/add >>>>> >>>>> dev=> add >>>>> >>>>> #object[dev$add 0x72f91c91 "dev$add@72f91c91"] >>>>> >>>>> So the value of add is an object, with type dev$add, a class that >>>>> implements a bunch of things including clojure.lang.IFn and >>>>> java.lang.Runnable and java.util.concurrent.Callable etc. >>>>> >>>>> The "name" of function is hard to get to, inside a function because of >>>>> that. >>>>> >>>>> One way to figure that out at runtime is to dig into the stack, which >>>>> you can get at by creating an exception and inspecting it: be aware that >>>>> this is an expensive operation! >>>>> >>>>> dev=> (*def
