aoc2019 | Elvish solutions to Advent of Code | Learning library
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Elvish solutions to Advent of Code 2019
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QUESTION
So I'm doing this years advent of code and I've come across a borrowing problem:
How to have a struct that accepts closures calling methods from another variable? Here's a minimum example I've managed to come up with. The borrow checker doesn't like that the two closures both borrow values.
If I have a mutex around values then it seems to work but I was hoping for a more elegant solution.
Essentially, I want to have different Brains with different input/output functions where one might just print outputs and another might be adding outputs to a vec.
...ANSWER
Answered 2020-Jan-08 at 00:10You are doing it wrong, you obviously can't do that in rust, you can only have one mutable reference or one and more reference, but not both. Instead of using interior mutability like Mutex
or Cell
, I advice you do use a trait, for example you could do:
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