isomorphisms

Code shown in my blog post "Isomorphisms Between Integers and Some Composite Types in Haskell".

Setup & Usage

git clone https://github.com/doersino/isomorphisms.git
cd isomorphisms
stack build && stack exec isomorphisms  # see haskellstack.org

Expected output (after the usual build status messages):

+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
+++ OK, passed 100 tests.
*** Failed! Falsifiable (after 2 tests):
1
*** Failed! Falsifiable (after 8 tests and 8 shrinks):
[0,0,0,3]

The last two tests fail for the reasons detailed in the post. You should go read it!