feat(conversions): add hint comments
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@ -1,6 +1,8 @@
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// The From trait is used for value-to-value conversions.
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// The From trait is used for value-to-value conversions.
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// If From is implemented correctly for a type, the Into trait should work conversely.
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// If From is implemented correctly for a type, the Into trait should work conversely.
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.From.html
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.From.html
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// Execute `rustlings hint from_into` or use the `hint` watch subcommand for a hint.
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#[derive(Debug)]
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#[derive(Debug)]
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struct Person {
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struct Person {
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name: String,
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name: String,
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@ -4,6 +4,8 @@
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// Additionally, upon implementing FromStr, you can use the `parse` method
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// Additionally, upon implementing FromStr, you can use the `parse` method
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// on strings to generate an object of the implementor type.
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// on strings to generate an object of the implementor type.
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// You can read more about it at https://doc.rust-lang.org/std/str/trait.FromStr.html
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// You can read more about it at https://doc.rust-lang.org/std/str/trait.FromStr.html
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// Execute `rustlings hint from_str` or use the `hint` watch subcommand for a hint.
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use std::num::ParseIntError;
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use std::num::ParseIntError;
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use std::str::FromStr;
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use std::str::FromStr;
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@ -37,6 +39,9 @@ enum ParsePersonError {
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// with something like `"4".parse::<usize>()`
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// with something like `"4".parse::<usize>()`
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// 6. If while extracting the name and the age something goes wrong, an error should be returned
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// 6. If while extracting the name and the age something goes wrong, an error should be returned
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// If everything goes well, then return a Result of a Person object
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// If everything goes well, then return a Result of a Person object
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//
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// As an aside: `Box<dyn Error>` implements `From<&'_ str>`. This means that if you want to return a
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// string error message, you can do so via just using return `Err("my error message".into())`.
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impl FromStr for Person {
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impl FromStr for Person {
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type Err = ParsePersonError;
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type Err = ParsePersonError;
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@ -3,6 +3,8 @@
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// Basically, this is the same as From. The main difference is that this should return a Result type
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// Basically, this is the same as From. The main difference is that this should return a Result type
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// instead of the target type itself.
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// instead of the target type itself.
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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// You can read more about it at https://doc.rust-lang.org/std/convert/trait.TryFrom.html
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// Execute `rustlings hint from_str` or use the `hint` watch subcommand for a hint.
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use std::convert::{TryFrom, TryInto};
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use std::convert::{TryFrom, TryInto};
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#[derive(Debug, PartialEq)]
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#[derive(Debug, PartialEq)]
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@ -4,6 +4,7 @@
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//
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//
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// The goal is to make sure that the division does not fail to compile
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// The goal is to make sure that the division does not fail to compile
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// and returns the proper type.
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// and returns the proper type.
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// Execute `rustlings hint using_as` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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// I AM NOT DONE
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