ns-ordering

Explore ns ordering in Clojure and ClojureScript

Background

Checks to emperically see if Clojure and ClojureScript (regular and bootstrapped), preserve order in ns forms.

This test inolves a linear chain of namespaces, each of which depends on the previous, along with a top-level namespace that has an ns form that loads things in the order of the chain.

There is an unordered directory containing the code but without the needed :require specs to specify the namespace dependencies (which would establish the correct dependency partial order so that the compiler can form a topoligical sort).

There is also an ordered directory which does contain the needed :require specs. Additionally, the top-level namespace loads things in a random order, thus forcing the compiler to properly make a correct topological sort.

Using

Choose directory

First go into either the unordered or the ordered directory.

Set up a REPL

Set up the REPL of your choice. Here are some examples.

Clojure

REPL-y:

$ lein repl

ClojureScript

Nashorn:

$ lein run -m cljs.repl.nashorn

Bootstrapped ClojureScript

Planck (brew install planck if you don't already have it):

$ planck -c src

Load

Load the top level namespace.

(require 'dep.top)

Note that, in the unordered tree, the attempt above to load dep.top will fail in a ClojureScript REPL.

If things work out, check that dep.z/z has the contents of dep.a/a.

dep.z/z