37 lines
1.1 KiB
Clojure
37 lines
1.1 KiB
Clojure
;; This Source Code Form is subject to the terms of the Mozilla Public
|
|
;; License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
(ns datomish.util
|
|
(:require
|
|
[clojure.string :as str]))
|
|
|
|
(defn raise [s]
|
|
#?(:clj (throw (Exception. s)))
|
|
#?(:cljs (throw (js/Error s))))
|
|
|
|
(defn var->sql-var
|
|
"Turns '?xyz into :xyz."
|
|
[x]
|
|
(if (and (symbol? x)
|
|
(str/starts-with? (name x) "?"))
|
|
(keyword (subs (name x) 1))
|
|
(raise (str x " is not a Datalog var."))))
|
|
|
|
(defn conj-in
|
|
"Associates a value into a sequence in a nested associative structure, where
|
|
ks is a sequence of keys and v is the new value, and returns a new nested
|
|
structure.
|
|
If any levels do not exist, hash-maps will be created. If the destination
|
|
sequence does not exist, a new one is created."
|
|
{:static true}
|
|
[m [k & ks] v]
|
|
(if ks
|
|
(assoc m k (conj-in (get m k) ks v))
|
|
(assoc m k (conj (get m k) v))))
|
|
|
|
(defmacro while-let [binding & forms]
|
|
`(loop []
|
|
(when-let ~binding
|
|
~@forms
|
|
(recur))))
|