Inconsistent struct constructor #6769
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matthiaskrgr
requested changes
Feb 21, 2021
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| /// **What it does:** Checks for struct constructors where the order of the field init | ||
| /// shorthand in the constructor is inconsistent with the order in the struct definition. | ||
| /// | ||
| /// **Why is this bad?** It decreases readability and consistency. | ||
| /// | ||
| /// **Known problems:** None. | ||
| /// | ||
| /// **Example:** | ||
| /// | ||
| /// ```rust | ||
| /// struct Foo { | ||
| /// x: i32, | ||
| /// y: i32, | ||
| /// } | ||
| /// let x = 1; | ||
| /// let y = 2; | ||
| /// Foo { y, x }; | ||
| /// ``` | ||
| /// | ||
| /// Use instead: | ||
| /// ```rust | ||
| /// # struct Foo { | ||
| /// # x: i32, | ||
| /// # y: i32, | ||
| /// # } | ||
| /// # let x = 1; | ||
| /// # let y = 2; | ||
| /// Foo { x, y }; | ||
| /// ``` |
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I wonder if we should add some kind of short demonstration that Foo {x, y} and Foo {y,x} are the same?
#[derive(Eq, PartialEq, Debug)]
struct Foo {x: i32, y: i32}
fn main() {
let x = 0;
let y = 1;
assert_eq!(Foo {x, y}, Foo {y, x});
}
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| } | ||
| fields_snippet.push_str(&format!("{}", last_ident)); | ||
|
|
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Hmm shouldn't this trigger clippy::useless_format...? 🤔
This can be just
fields_snippet.push_str(&last_ident.to_string());
| let base_snippet = if let Some(base) = base { | ||
| format!(", ..{}", snippet(cx, base.span, "..")) | ||
| } else { | ||
| "".to_string() |
matthiaskrgr
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Changes:
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matthiaskrgr
approved these changes
Feb 22, 2021
|
Thanks! |
|
📌 Commit bfdf0fa has been approved by |
|
☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test |
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fixes: #6352
r? @matthiaskrgr
I added the lint that checks for the struct constructors where the order of the field init shorthands is inconsistent with that in the struct definition.
changelog: Add style lint:
inconsistent_struct_constructor