I am working on rust from quit some time. I have the basic concepts and can write fair level of complex code in Rust.
Recently, I started learning substrate, I noticed that they have used very advance level of rust in substrate. To expand my knowledge and to learn some advance topics like macros associated types etc. I wanted to join some advance lever of rust course.
Anyone can here please guide to join an advance level rust course?
Some good sources of advanced Rust knowledge include:
If you like videos, the videos by Jon Gjengset are pretty good and cover interesting intermediate level topics, e. g. in the Crust of Rust series as well as some advanced topics like async, futures, and pinning (but feel free to also look into further videos on the channel beyond just those two playlists).
Thank you so much! 
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