Oh! yes it does!
-A
On Wed, Dec 19, 2012 at 6:39 PM, Dave Ray wrote:
> It does, right?
>
>
> On Wednesday, December 19, 2012, Alan Shaw wrote:
>
>> But returning the evaluation was a requirement...
>>
>>
>> On Wed, Dec 19, 2012 at 2:58 PM, Alan Shaw wrote:
>>
>> No, there was no requirement
It does, right?
On Wednesday, December 19, 2012, Alan Shaw wrote:
> But returning the evaluation was a requirement...
>
>
> On Wed, Dec 19, 2012 at 2:58 PM, Alan Shaw wrote:
>
> No, there was no requirement that it be a macro. Thanks!
>
> -A
>
>
>
> On Wed, Dec 19, 2012 at 7:40 AM, Dave Ray wro
A function seems to work fine unless I don't understand your requirement:
; normal version that takes code forms and symbols
(defn eval-in
[code ns]
(let [old (-> *ns* str symbol)]
(try
(in-ns ns)
(eval code)
(finally
(in-ns old)
; sugary
Thanks again. This version is easier for my non-macro brain to follow.
-A
On Wed, Dec 19, 2012 at 8:58 AM, juan.facorro wrote:
> The following example shows an implementation of *eval-in* as a function.
>
> There are a some *println* added to show the namespace where the code is
> running at e
The following example shows an implementation of *eval-in* as a function.
There are a some *println* added to show the namespace where the code is
running at each point.
;;
(ns another-ns)
(defn X [w h]
{:w w :h h})
;;
(ns this-ns)
(defn eval-in [code
As an aside, I'm curious about whether this could have been implemented
without a macro.
-A
On Dec 18, 2012 11:06 PM, "Alan Shaw" wrote:
> Thanks very much Juan, that's some good study material for me.
>
> -A
> On Dec 18, 2012 10:45 PM, "juan.facorro" wrote:
>
>> The macro sees it arguments a
Thanks very much Juan, that's some good study material for me.
-A
On Dec 18, 2012 10:45 PM, "juan.facorro" wrote:
> The macro sees it arguments as *symbols* and does not resolve to the
> corresponding *var* until evaluation, so the value for the local *code* var
> in the macro is actually the *
The macro sees it arguments as *symbols* and does not resolve to the
corresponding *var* until evaluation, so the value for the local *code* var
in the macro is actually the *symbol** generator.*
The *eval-in* macro uses the *read-string* function to evaluate the code
you provide, this function
>From yesterday:
(defmacro eval-in
"Eval a Clojure form in a different namespace and switch back to current
namespace.
Args:
code - Clojure form as string
ns - Target namespace as string"
[code ns]
`(do
(in-ns '~(symbol ns))
(let [ret# (eval '~(read-string code))]
Now I do, and the macro worked!
I believe I have a problem using the macro from a function, but leaving
that for tomorrow.
Thanks BG!
-A
On Tue, Dec 18, 2012 at 12:19 AM, Baishampayan Ghose wrote:
> Do you have target ns "clevolution.version.version0-1-1" required?
>
> -BG
>
> On Tue, Dec 18,
Do you have target ns "clevolution.version.version0-1-1" required?
-BG
On Tue, Dec 18, 2012 at 1:38 PM, Alan Shaw wrote:
> BG,
> The macro doesn't seem to do the trick. The function X is interned in the
> target namespace, but:
>
> user=> (def image (eval-in "(X 400 400)"
> "clevolution.version.
BG,
The macro doesn't seem to do the trick. The function X is interned in the
target namespace, but:
user=> (def image (eval-in "(X 400 400)"
"clevolution.version.version0-1-1"))
CompilerException java.lang.RuntimeException: Unable to resolve symbol: X
in this context, compiling:(NO_SOURCE_PATH:1)
Oh yes, the something.something is fixed so I can just prepend it, thanks.
(Hadn't noticed your macro takes the ns as a string!)
-A
On Mon, Dec 17, 2012 at 11:47 PM, Baishampayan Ghose wrote:
> Alan,
>
> What you're asking for is to derive the ns "clojure.core" given only
> "core". Not sure i
Alan,
What you're asking for is to derive the ns "clojure.core" given only
"core". Not sure if that's possible.
The namespace constitutes the whole dotted structure and not just the
last component, I am afraid.
If the actual ns is something.something.version-0-1-1, then you need
the string "some
Thanks BG, I'm trying that.
But I don't think it addresses how to get from the string "version-0-1-1"
to the namespace something.something.version-0-1-1. How can I do that?
-A
On Mon, Dec 17, 2012 at 11:26 PM, Baishampayan Ghose wrote:
> Alan,
>
> Something like this might work for you -
>
> (
Alan,
Something like this might work for you -
(defmacro eval-in
"Eval a Clojure form in a different namespace and switch back to
current namespace.
Args:
code - Clojure form as string
ns - Target namespace as string"
[code ns]
`(do
(in-ns '~(symbol ns))
(let [ret# (eval
Thanks, Las!
Ok say I have a file in which there is string such as
"(- (atan (bw-noise 902 2 0.7604615575402431 400 400))
(read-image-from-file \"images/Dawn_on_Callipygea.png\"))"
and another
"version-0-0-1"
and I have a namespace version-0-0-1 into which functions named atan etc.
are all :re
ah, sorry, it's a bit early for me
(in-ns (ns-name user-ns))
if you could post a simple example for the second part of your question I
maybe able to help.
Las
Alan Shaw 2012. december 18., kedd napon a következőt írta:
> Ah no, that puts me in a new user-ns namespace! Not what I wanted!
>
>
>
Ah no, that puts me in a new user-ns namespace! Not what I wanted!
On Mon, Dec 17, 2012 at 10:51 PM, László Török wrote:
> Try (in-ns 'user-ns)
>
> Las
> On Dec 18, 2012 7:50 AM, "Alan Shaw" wrote:
>
>> user=> *ns*
>> #
>> user=> (def user-ns *ns*)
>> #'user/user-ns
>> user=> user-ns
>> #
>> u
Try (in-ns 'user-ns)
Las
On Dec 18, 2012 7:50 AM, "Alan Shaw" wrote:
> user=> *ns*
> #
> user=> (def user-ns *ns*)
> #'user/user-ns
> user=> user-ns
> #
> user=> (in-ns user-ns)
> ClassCastException clojure.lang.Namespace cannot be cast to
> clojure.lang.Symbol clojure.lang.RT$1.invoke (RT.java
user=> *ns*
#
user=> (def user-ns *ns*)
#'user/user-ns
user=> user-ns
#
user=> (in-ns user-ns)
ClassCastException clojure.lang.Namespace cannot be cast to
clojure.lang.Symbol clojure.lang.RT$1.invoke (RT.java:226)
It appears I'm not understanding how namespaces are represented.
Also, is it just
21 matches
Mail list logo
