feat: Add move_semantics5 exercise. (#746)
* feat: Add move_semantics5 exercise. * feat: Add option3 exercise * Address review comments. Fix typos, sentence formatting. * Remove unwanted newline. * Address review comments: make comment inline, fix format in print.
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exercises/move_semantics/move_semantics5.rs
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exercises/move_semantics/move_semantics5.rs
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@ -0,0 +1,14 @@
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// move_semantics5.rs
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// Make me compile without adding any newlines or removing any of the lines.
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// Execute `rustlings hint move_semantics5` for hints :)
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// I AM NOT DONE
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fn main() {
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let mut x = 100;
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let y = &mut x;
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let z = &mut *y;
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*y += 100;
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*z += 1000;
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assert_eq!(x, 1200);
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}
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exercises/option/option3.rs
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exercises/option/option3.rs
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// option3.rs
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// Make me compile! Execute `rustlings hint option3` for hints
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// I AM NOT DONE
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struct Point {
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x: i32,
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y: i32,
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}
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fn main() {
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let y: Option<Point> = Some(Point { x: 100, y: 200 });
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match y {
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Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
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_ => println!("no match"),
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}
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y; // Fix without deleting this line.
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}
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info.toml
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info.toml
@ -210,6 +210,17 @@ So the end goal is to:
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- since we're not creating a new vec in `main` anymore, we need to create
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a new vec in `fill_vec`, similarly to the way we did in `main`"""
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[[exercises]]
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name = "move_semantics5"
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path = "exercises/move_semantics/move_semantics5.rs"
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mode = "compile"
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hint = """
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Carefully reason about the range in which each mutable reference is in
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vogue. Does updating the value of referrent (x) immediately after the
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mutable reference is taken helps? Read more about 'Mutable Referenes'
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in the book's section References and Borrowing':
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https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html#mutable-references."""
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# PRIMITIVE TYPES
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[[exercises]]
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@ -578,6 +589,16 @@ For example: Some(Some(variable)) = variable2
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Also see Option::flatten
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"""
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[[exercises]]
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name = "option3"
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path = "exercises/option/option3.rs"
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mode = "compile"
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hint = """
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The compiler says a partial move happened in the `match`
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statement. How can this be avoided? The compiler shows the correction
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needed. After making the correction as suggested by the compiler, do
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read: https://doc.rust-lang.org/std/keyword.ref.html"""
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[[exercises]]
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name = "result1"
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path = "exercises/error_handling/result1.rs"
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