2026-10-30 announcements | Clojure Slack Archive

announcements 2026-10-30

2026-10-30T07:56:48.662449Z

lasertag-logo https://github.com/paintparty/lasertag A library for categorizing values in Clojure dialects - v0.15.0 Works with Clojure, ClojureScript, and Babashka, and Jolt This library arose during development of the hifi printing engine used by https://github.com/paintparty/bling and https://github.com/paintparty/fireworks. Basic examples:

(require '[lasertag.core :refer [tag tag-map]])

(tag "hi")      ; => :string
(tag :hi)       ; => :keyword
(tag #"^hi$")   ; => :regex
(tag true)      ; => :boolean
(tag [1 2 3])   ; => :vector
(tag '(1 2 3))  ; => :seq
(tag (range 3)) ; => :seq
(tag 1)         ; => :number
(tag 1.5)       ; => :number
(tag ##Inf)     ; => :number


;; tag-map returns a map with more info

(tag-map (range 3))
=>
{:tag       :seq
 :type      clojure.lang.LongRange
 :classname "clojure.lang.LongRange"
 :category  "collections"
 :all-tags  #{:seqable
              :sequential
              :coll
              :deferred
              :coll-like
              :lazy
              :seq
              :list-like
              :carries-meta
              :range}}

https://github.com/paintparty/lasertag/blob/main/CHANGELOG.md highlights: • New project logo, compliant with the https://www.lasermet.com/blog/laser-warning-labels-requirements-and-what-you-need-to-know-for-compliance/ for laser products • More robust and refined primary and secondary tags for type categorization (see thread for details) • Added canonical :category entry to tag-map result. • Performance improvements - most values will return in 15 ~ 50 nanoseconds, depending on hardware • Now works with Jolt:zap: • More granular secondary tagging for subclasses of Number • Significant refactoring and simplification of codebase • Streamlined testing internals More details in 🧵

2026-10-30T07:58:29.412759Z

All primary tags:

[:agent
 :array
 :atom
 :boolean
 :char
 :datetime
 :delay
 :function
 :keyword
 :list
 :map
 :nil
 :number
 :queue
 :reader-conditional
 :ref
 :regex
 :seq
 :set
 :string
 :symbol
 :throwable
 :uuid
 :var
 :vector
 :volatile]

All secondary tags (these show up in the :all-tags entry). Some are specific to respective platform (JVM, JS):

[:array-like
 :associative
 :big-decimal
 :big-int
 :byte
 :callable
 :carries-meta
 :char-sequence
 :coll
 :coll-like
 :cons
 :def
 :deferred
 :double
 :editable
 :error
 :exception
 :float
 :fractional
 :generator
 :global-this
 :hash-map
 :infinite
 :infinity
 :-infinity
 :inst
 :int
 :iterable
 :js
 :lazy
 :list-like
 :long
 :map-entry
 :map-like
 :multi-function
 :named
 :nan
 :nat-int
 :neg
 :neg-int
 :object
 :pos
 :pos-int
 :promise
 :range
 :ratio
 :real
 :record
 :reference
 :scalar
 :seqable
 :sequential
 :set-like
 :short
 :sorted
 :stack
 :subvec
 :transient
 :typed-array
 :whole
 :zero]

New canonical-categories . A value’s canonical category is based on its primary tag.

(def canonical-categories
  {"scalars"         #{:keyword :number :string :symbol :boolean :nil :char :uuid :regex}
   "collections"     #{:seq :map :vector :set :list :array :queue}
   "functions"       #{:function}
   "temporal values" #{:datetime}
   "identities"      #{:volatile :atom :agent :ref :var :delay}
   "pending values"  #{:promise :future}
   "throwables"      #{:throwable}
   "reflection"      #{:reader-conditional}})

shaunlebron 2026-10-30T15:53:26.236409Z

regex typo!

🙇 1

2026-10-30T16:29:41.521439Z

Fixed!

Clojurians Log v2

announcements 2026-10-30