Comment by fizlebit

Looks a bit like Rust. My peeve with Rust is that it makes error handling too much donkey work. In a large class of programs you just care that something failed and you want a good description of that thing:

  context("Loading configuration from {file}")

Then you get a useful error message by unfolding all the errors at some point in the program that is makes sense to talk to a human, e.g. logs, rpc error etc.

Failed: Loading configuration from .config because: couldn't open file .config because: file .config does not exist.

It shouldn't be harder than a context command in functions. But somehow Rust conspires to require all this error type conversion and question marks. It it is all just a big uncomfortable donkey game, especially when you have nested closures forced to return errors of a specific type.