RE: records alias with local vars

2019-08-29 Thread Sean Corfield 
Yup. Repro’d it now. Not sure why I didn’t get the reflection warning when I 
tried it yesterday. Weird.

Definitely looks like a bug.

I guess almost no one has ever run into this because it’s idiomatic (and almost 
universal, I expect) to use CamelCase for record names and kebab-case for 
arguments/locals so they would never normally conflict…?

Sean Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood

From: Andy Fingerhut
Sent: Wednesday, August 28, 2019 7:06 PM
To: clojure@googlegroups.com
Subject: Re: records alias with local vars

I tried it on Clojure 1.10.1 and if I first did (set! *warn-on-reflection* 
true) the defn of b did give a reflection warning if you first did the 
defrecord, but not without the defrecord.

Andy

On Wed, Aug 28, 2019 at 6:35 PM Sean Corfield  wrote:
What version of Clojure/Script are you using? This works fine for me on Clojure 
1.10.1.

On Wed, Aug 28, 2019 at 4:08 PM Brian Craft  wrote:
In this example

(defrecord x [y])

(defn b [x] (.getBytes ^String x))


The compiler fails to resolve .getBytes. It emits reflection code, saying x is 
a class. It is resolved by deleting the defrecord, or renaming the parameter.

Is this expected, or documented? Are there other cases like this?
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Re: records alias with local vars

2019-08-28 Thread Shogo Ohta 
With the presence of the record definition, the macro expander seems to 
expand

(.getBytes ^String x)

into

(. ^Class (clojure.core/identity ^java.lang.String x) getBytes)

and which causes reflection call.
(BTW this "tricky" expansion is done to distinguish instance method calls 
on Class objects from static method calls if I understand correctly. cf. 
https://github.com/clojure/clojure/blob/653b8465845a78ef7543e0a250078eea2d56b659/src/jvm/clojure/lang/Compiler.java#L7035-L7039)

So, to resolve the issue, I think the macro expander should look at the 
local env first to check whether or not a local binding shadows the 
class-ish name.

On Thursday, August 29, 2019 at 8:08:32 AM UTC+9, Brian Craft wrote:
>
> In this example
>
> (defrecord x [y])
>
> (defn b [x] (.getBytes ^String x))
>
>
> The compiler fails to resolve .getBytes. It emits reflection code, saying 
> x is a class. It is resolved by deleting the defrecord, or renaming the 
> parameter.
>
> Is this expected, or documented? Are there other cases like this?
>

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Re: records alias with local vars

2019-08-28 Thread Andy Fingerhut 
I tried it on Clojure 1.10.1 and if I first did (set! *warn-on-reflection*
true) the defn of b did give a reflection warning if you first did the
defrecord, but not without the defrecord.

Andy

On Wed, Aug 28, 2019 at 6:35 PM Sean Corfield  wrote:

> What version of Clojure/Script are you using? This works fine for me on
> Clojure 1.10.1.
>
> On Wed, Aug 28, 2019 at 4:08 PM Brian Craft  wrote:
>
>> In this example
>>
>> (defrecord x [y])
>>
>> (defn b [x] (.getBytes ^String x))
>>
>>
>> The compiler fails to resolve .getBytes. It emits reflection code, saying
>> x is a class. It is resolved by deleting the defrecord, or renaming the
>> parameter.
>>
>> Is this expected, or documented? Are there other cases like this?
>>
>> --
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>> 
>> .
>>
>
>
> --
> Sean A Corfield -- (904) 302-SEAN
> An Architect's View -- http://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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> 
> .
>

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Re: records alias with local vars

2019-08-28 Thread Sean Corfield 
What version of Clojure/Script are you using? This works fine for me on
Clojure 1.10.1.

On Wed, Aug 28, 2019 at 4:08 PM Brian Craft  wrote:

> In this example
>
> (defrecord x [y])
>
> (defn b [x] (.getBytes ^String x))
>
>
> The compiler fails to resolve .getBytes. It emits reflection code, saying
> x is a class. It is resolved by deleting the defrecord, or renaming the
> parameter.
>
> Is this expected, or documented? Are there other cases like this?
>
> --
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> 
> .
>


-- 
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- http://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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records alias with local vars

2019-08-28 Thread Brian Craft 
In this example

(defrecord x [y])

(defn b [x] (.getBytes ^String x))


The compiler fails to resolve .getBytes. It emits reflection code, saying x 
is a class. It is resolved by deleting the defrecord, or renaming the 
parameter.

Is this expected, or documented? Are there other cases like this?

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