clippy::init_numbered_fields: used a field initializer for a tuple struct

What you see

warning: used a field initializer for a tuple struct
 --> main.rs:5:9
  |
5 |   let _ = TupleStruct {
  |  _________^
6 | |     0: 1,
7 | |     1: 23,
8 | | };
  | |_^ help: use tuple initialization: `TupleStruct(1, 23)`
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/stable/index.html#init_numbered_fields
  = note: `#[warn(clippy::init_numbered_fields)]` on by default

Real output of Clippy 0.1.99 (Rust 1.99) on the example below. Names and line numbers in yours will differ.

Does it matter?

This may be confusing to the uninitiated and adds no benefit as opposed to tuple initializers

Code that works but is not idiomatic Rust. Warns by default.

How to fix it

Clippy can fix this one for you: run cargo clippy --fix (add --allow-dirty if you have uncommitted changes). Review the diff before you commit.

Flagged

struct TupleStruct(u8, u16);

let _ = TupleStruct {
    0: 1,
    1: 23,
};

// should be written as
let base = TupleStruct(1, 23);

// This is OK however
let _ = TupleStruct { 0: 42, ..base };

Turn it off, or on

Allow it where it does not fit your code, as narrowly as you can:

#[allow(clippy::init_numbered_fields)]
fn my_function() { /* ... */ }

[lints.clippy]
init_numbered_fields = "allow"

cargo clippy -- -A clippy::init-numbered-fields

The [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.