generics2 solution

This commit is contained in:
mo8it 2024-06-27 02:25:11 +02:00
parent 46121b71cf
commit de3f846a53
3 changed files with 32 additions and 9 deletions

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@ -1,10 +1,10 @@
// This powerful wrapper provides the ability to store a positive integer value. // This powerful wrapper provides the ability to store a positive integer value.
// Rewrite it using generics so that it supports wrapping ANY type. // TODO: Rewrite it using a generic so that it supports wrapping ANY type.
struct Wrapper { struct Wrapper {
value: u32, value: u32,
} }
// TODO: Adapt the struct's implementation to be generic over the wrapped value.
impl Wrapper { impl Wrapper {
fn new(value: u32) -> Self { fn new(value: u32) -> Self {
Wrapper { value } Wrapper { value }

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@ -746,12 +746,8 @@ the generic of the vector."""
name = "generics2" name = "generics2"
dir = "14_generics" dir = "14_generics"
hint = """ hint = """
Currently we are wrapping only values of type `u32`. Related section in The Book:
https://doc.rust-lang.org/stable/book/ch10-01-syntax.html#in-method-definitions"""
Maybe we could update the explicit references to this data type somehow?
If you are still stuck https://doc.rust-lang.org/stable/book/ch10-01-syntax.html#in-method-definitions
"""
# TRAITS # TRAITS

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@ -1 +1,28 @@
// Solutions will be available before the stable release. Thank you for testing the beta version 🥰 struct Wrapper<T> {
value: T,
}
impl<T> Wrapper<T> {
fn new(value: T) -> Self {
Wrapper { value }
}
}
fn main() {
// You can optionally experiment here.
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn store_u32_in_wrapper() {
assert_eq!(Wrapper::new(42).value, 42);
}
#[test]
fn store_str_in_wrapper() {
assert_eq!(Wrapper::new("Foo").value, "Foo");
}
}