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Macro hygiene is the concept of macros that work in all contexts; they don't affect and aren't
affected by anything around them. Ideally all macros would be fully hygienic, but there are lots
of pitfalls and traps that make it all too easy to accidentally write unhygienic macros. This guide
attempts to provide a comprehensive resource for writing the most hygienic macros.
Understanding the Module System
First, a little aside on the details of Rust's module system, and specifically paths; it is
This will show you all the commits at the tips of your commit graph which are no longer referenced from any branch or tag – every lost commit, including every stash commit you’ve ever created, will be somewhere in that graph.