Rust @programming.dev Apoplexy @lemmy.world 3w ago

Tracking issue for RFC 3681: Default field values · Issue #132162 · rust-lang/rust

github.com Tracking issue for RFC 3681: Default field values · Issue #132162 · rust-lang/rust

This is a tracking issue for the RFC "3681" (rust-lang/rfcs#3681). The feature gate for the issue is #![feature(default_field_values)]. Allow struct definitions to provide default values for indivi...

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6 comments

This is really great and would solve the problem that led me to create constructor-lite.

With this RFC, its usage could be replaced with

#[derive(Debug, PartialEq)] struct Movie { title: String, year: Option<u16> = None, } assert_eq!( Movie { title: "Star Wars".to_owned(), .. }, Movie { title: "Star Wars".to_owned(), year: None }, )
- Think you would need Movie { title: "Star Wars".to_owned(), .. }, the .. is mandatory.
  
  Thanks, that was an oversight on my part.

6 comments