Can a protocol method have the same name as a clojure.core function?
I'd like to name a protocol method to be the same name as a clojure.core function, for example, get. Is this possible, and if so, how? user= (ns ptest.protocol (:refer-clojure :exclude [get])) nil ptest.protocol= (defprotocol TestProtocol (get [_ key] Returns the contents of field :key) ) TestProtocol ptest.protocol= (ns ptest.core (:require [ptest.protocol :as testp]) (:refer-clojure :exclude [get])) ptest.core= (defrecord TF [a b ] testp/TestProtocol (get [this key] Doesn't work!)) CompilerException java.lang.ClassFormatError: Duplicate method namesignature in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1) -- -- 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. For more options, visit https://groups.google.com/groups/opt_out.
Re: Can a protocol method have the same name as a clojure.core function?
You just can't use defrecord, because defrecord macroexpands into a deftype that implements a *different* protocol with a function *also* named get. On Thu, Feb 7, 2013 at 9:24 PM, Don Jackson cloj...@clark-communications.com wrote: I'd like to name a protocol method to be the same name as a clojure.core function, for example, get. Is this possible, and if so, how? user= (ns ptest.protocol (:refer-clojure :exclude [get])) nil ptest.protocol= (defprotocol TestProtocol (get [_ key] Returns the contents of field :key) ) TestProtocol ptest.protocol= (ns ptest.core (:require [ptest.protocol :as testp]) (:refer-clojure :exclude [get])) ptest.core= (defrecord TF [a b ] testp/TestProtocol (get [this key] Doesn't work!)) CompilerException java.lang.ClassFormatError: Duplicate method namesignature in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1) -- -- 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. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- 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. For more options, visit https://groups.google.com/groups/opt_out.
Re: Can a protocol method have the same name as a clojure.core function?
That makes perfect sense, and I should have figured that out since defrecord is implementing a bunch of useful protocols underneath…. Thanks for the quick response! On Feb 7, 2013, at 9:38 PM, Ben Wolfson wolf...@gmail.com wrote: You just can't use defrecord, because defrecord macroexpands into a deftype that implements a *different* protocol with a function *also* named get. On Thu, Feb 7, 2013 at 9:24 PM, Don Jackson cloj...@clark-communications.com wrote: I'd like to name a protocol method to be the same name as a clojure.core function, for example, get. Is this possible, and if so, how? user= (ns ptest.protocol (:refer-clojure :exclude [get])) nil ptest.protocol= (defprotocol TestProtocol (get [_ key] Returns the contents of field :key) ) TestProtocol ptest.protocol= (ns ptest.core (:require [ptest.protocol :as testp]) (:refer-clojure :exclude [get])) ptest.core= (defrecord TF [a b ] testp/TestProtocol (get [this key] Doesn't work!)) CompilerException java.lang.ClassFormatError: Duplicate method namesignature in class file ptest/core/TF, compiling:(NO_SOURCE_PATH:1) -- -- 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. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- 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. For more options, visit https://groups.google.com/groups/opt_out. -- -- 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. For more options, visit https://groups.google.com/groups/opt_out.
Re: Can a protocol method have the same name as a clojure.core function?
Hi,
you can still use a defrecord. Just don't implement the protocol inline.
Clojure
user= (ns foo.bar (:refer-clojure :exclude [get]))
nil
foo.bar= (defprotocol FooBar (get [this]))
FooBar
foo.bar= (ns foo.baz)
nil
foo.baz= (alias 'fb 'foo.bar) ; this is due to working only in the repl.
Normally you would use :require in the ns clause.
nil
foo.baz= (defrecord Baz [a b c])
foo.baz.Baz
foo.baz= (extend-type Baz
fb/FooBar
(get [{:keys [a b c]}] (str a b c)))
nil
foo.baz= (fb/get (-Baz fo ob ar))
foobar
Implementing a protocol inline is an optimisation, not a requirement.
Meikel
--
--
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.
For more options, visit https://groups.google.com/groups/opt_out.
