Aodhnait Étaín 3062ac9f45 Add unary operator parsing ... Now we can also parse unary +, i.e. +17, and also expressions that contain it, i.e. +17 + 23. We also now have custom Debug implementation for Expression, which prints them in more useful, s-expression-like syntax, i.e. +17 + 23 => (+ +17 23). We also change implementation of `TokenStream`s `next` and `parse_next` methods to allow to easily implement `peek` method for looking at the (possible) next token without advancing the stream.		2021-05-23 08:06:53 +01:00
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main.rs	Add unary operator parsing	2021-05-23 08:06:53 +01:00