I am a bit new to the CL type system but I thought something like the following could work. (deftype list-of (type) `(labels ((check-all (l) (every (lambda (item) (typep item ,type)) l))) (and...

I'm trying out Clojure 1.2, specifically mutable fields which are supported in deftype according to the clojure.org documentation. But I can't get the set to work. What is the syntax for updating...

I'd like to be able to use a defined type as a parameter specializer to a defmethod. The motivation is readability and flexibility to change at a later stage. Somehting like this: (deftype foo () ...

I have a project set up with leiningen called techne. I created a module called scrub with a type in it called Scrub and a function called foo. techne/scrub.clj: (ns techne.scrub) (deftype Scrub...

I want to implement transient and persistent! in my Clojure deftype. As far as I can tell, this means having another deftype, TransientMyThing, implement the necessary methods. Okay so far, but tho...

EDIT: After posting the previous version of my question I discovered that the real problem is with nested functions. If I have a closure within a deftype I can not update any mutable fields from w...

As an exercise, I am developing a data structure similar to Vector. I have implemented all interfaces which IPersistentVector extends, but I have not found the interface where 'conj' is defined. Wh...

I'm curious as to how to do a Clojure deftype that contains a reference to itself, e.g. (deftype BinaryTree [^BinaryTree left ^BinaryTree right]) This doesn't work... however I see no intrinsic...

(deftype Bag [state] Object (toString [bag] (str "Bag???" state))) I want the toString to look something like clojure.core=> (def b (Bag. {:apples 1 :bannanas 4})) #'clojure.core/b clojur...

I am trying to use clojure in a compiler and thus need to parameterize calls to deftype; however, I am having difficulty making the type hints carry through. Consider the following code: (defn des...

I'm trying to create a new type in Clojure using deftype to implement a two dimensional (x,y) coordinate, which implements a "Location" protocol. I'd also like to have this implement the standard ...

I'm attempting to use deftype (from the bleeding-edge clojure 1.2 branch) to create a java class that implements the java Servlet interface. I would expect the code below to compile (even though it...

Clojure structs can be arbitrarily extended, adding new fields. Is it possible to extend types (created using deftype) in a similar way? EDIT: For the benefit future visitors, as Brian pointed o...

Yesterday, Rich pulled the 'new' branch of Clojure into master. We are now embracing the beauty that is deftype and defprotocol. Of course, I, coming from Haskell, am very tempted to define types l...

In clojure, how do I type type hint a type that I have created? (I want to nest the types.) e.g. I had thought that this would work: (deftype A [#^somePrimitive someField]) (deftype B [#^A Av...