Error code E0027

A pattern for a struct fails to specify a sub-pattern for every one of the struct's fields.

Erroneous code example:

#![allow(unused)] fn main() { struct Dog { name: String, age: u32, } let d = Dog { name: "Rusty".to_string(), age: 8 }; // This is incorrect. match d { Dog { age: x } => {} } }

To fix this error, ensure that each field from the struct's definition is mentioned in the pattern, or use .. to ignore unwanted fields. Example:

#![allow(unused)] fn main() { struct Dog { name: String, age: u32, } let d = Dog { name: "Rusty".to_string(), age: 8 }; match d { Dog { name: ref n, age: x } => {} } // This is also correct (ignore unused fields). match d { Dog { age: x, .. } => {} } }