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| programming:rust [2020/12/13 18:26] – [Traits] mh | programming:rust [2021/05/25 22:07] (current) – [Enums] mh |
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| === 'match' workflow === | === 'match' workflow === |
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| In general, ''Option<T>'' is used when you want code that will handle each variant. The ''match'' expression is a control flow construct that does just this when used with enums: it will run different code depending on which variant of the enum it has, and that code can use the data inside the matching value. | In general, we use an ''Option<T>'' when we want to handle all the cases. The ''match'' expression is a control flow construct that does just this when used with enums: it will run different code depending on which variant of the enum it has, and that code can use the data inside the matching value. |
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| Combining ''match'' and ''enum'' is useful in many situations: ''match'' against an ''enum'', bind a variable to the data inside, and then execute code based on it. | Combining ''match'' and ''enum'' is useful in many situations: ''match'' against an ''enum'', bind a variable to the data inside, and then execute code based on it. |
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| Traits can be used to define functions that accept many different types who all implement a certain trait. The function is defined using that trait as a parameter, instead of concrete types. [[https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters|Check here]] for more info. | Traits can be used to define functions that accept many different types who all implement a certain trait. The function is defined using that trait as a parameter, instead of concrete types. [[https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters|Check here]] for more info. |
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| | === Blanket implementations === |
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| | They are extensively used in the Rust Standard librarby and allow implementing a trait for any type that implements another trait. [[https://doc.rust-lang.org/book/ch10-02-traits.html#using-trait-bounds-to-conditionally-implement-methods|More info]] |
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| | ==== Lifetimes ==== |
| ===== Misc ===== | ===== Misc ===== |
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