[Traster]

Ah, the old "Read the code" version of documentation. Guess what? That's not documentation. That's douchebag for "I didn't write documentation"

[shafte]

That doesn't seem very fair. They link a docs folder and an overview document, neither of which require that the user read code to get a good idea of the library's contents.

That said, the code is also reasonably well commented as well, for example: https://github.com/facebook/folly/blob/master/folly/Singleto.... So "read the code" is not terrible advice in this case either.