feat(errors5): add simpler explanation for box dyn
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977a167335
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@ -459,7 +459,7 @@ checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
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[[package]]
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[[package]]
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name = "rustlings"
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name = "rustlings"
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version = "4.8.0"
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version = "5.0.0"
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dependencies = [
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dependencies = [
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"argh",
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"argh",
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"assert_cmd",
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"assert_cmd",
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@ -4,6 +4,8 @@
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// This exercise uses some concepts that we won't get to until later in the course, like `Box` and the
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// This exercise uses some concepts that we won't get to until later in the course, like `Box` and the
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// `From` trait. It's not important to understand them in detail right now, but you can read ahead if you like.
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// `From` trait. It's not important to understand them in detail right now, but you can read ahead if you like.
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// For now, think of the `Box<dyn ...>` type as an "I want anything that does ???" type, which, given
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// Rust's usual standards for runtime safety, should strike you as somewhat lenient!
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// In short, this particular use case for boxes is for when you want to own a value and you care only that it is a
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// In short, this particular use case for boxes is for when you want to own a value and you care only that it is a
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// type which implements a particular trait. To do so, The Box is declared as of type Box<dyn Trait> where Trait is the trait
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// type which implements a particular trait. To do so, The Box is declared as of type Box<dyn Trait> where Trait is the trait
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