TransformersStepByStep
This is a tutorial on monad transformers.
The PDF
The PDF version of the tutorial is in subdirectory pdf.
Playing with the code
You can load the code into ghci and play with it like this:
ghci Transformers.lhs
:t eval2b
How to build
On Debian 10, the following should work and create Transformers.pdf:
sudo apt install texlive
lhs2TeX Transformers.lhs > Transformers.tex
pdflatex Transformers.tex
bibtex Transformers.aux
pdflatex Transformers.tex