E0026 - Error codes index (original) (raw)

Error codes index

Error code E0026

A struct pattern attempted to extract a nonexistent field from a struct.

Erroneous code example:

#![allow(unused)]
fn main() {
struct Thing {
    x: u32,
    y: u32,
}

let thing = Thing { x: 0, y: 0 };

match thing {
    Thing { x, z } => {} // error: `Thing::z` field doesn't exist
}
}

If you are using shorthand field patterns but want to refer to the struct field by a different name, you should rename it explicitly. Struct fields are identified by the name used before the colon : so struct patterns should resemble the declaration of the struct type being matched.

#![allow(unused)]
fn main() {
struct Thing {
    x: u32,
    y: u32,
}

let thing = Thing { x: 0, y: 0 };

match thing {
    Thing { x, y: z } => {} // we renamed `y` to `z`
}
}