The details of higher-rank sub are in the rustc book not a doc module.
The details of higher-rank sub are in the rustc book not a doc module.

aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust