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Hi, I’m Thomas Letan (lthms) (he/him).

You read something which caught your attention and you are interested in starting a discussion? Don’t hesitate to shoot me an email.


Neovim, OCaml Interfaces, Tree-Sitter and LSP (

Can we all agree that witnessing syntax highlighting being absolutely off is probably the most annoying thing that can happen to anybody?

Writing a Function Whose Argument is a Polymorphic Function in OCaml (

In OCaml, it is not possible to write a function whose argument is a polymorphic function. Trying to write such a function results in the type-checker complaining back at you. The trick to be able to write such a function is to use records.

Implementing an Echo Server in Coq with coqffi.1.0.0 (

In this article, we will demonstrate how coqffi can be used to implement an echo server, i.e., a TCP server which sends back any input it receives from its clients.

coqffi.1.0.0 In A Nutshell (

For each entry of a cmi file, coqffi tries to generate an equivalent (from the extraction mechanism perspective) Coq definition. In this article, we walk through how coqffi works.