CODEWITHSUNDEEP
rustpattern-matching
Foobar
Foobar

Reputation: 8467

Match on field inside enum data in Rust?

Let's say I have the enum:

enum Foo {
    Bar {baz: Option<Buzz> },
}


struct Buzz {}

is there a way to match on whether baz is None or not?

How to match struct fields in Rust? doesn't seem to work because Rust interprets

match foo {
    Foo::Bar { baz: Buzz } => {
    },
    Foo::Bar { baz: None } => {
    }
}

the baz: Bar as a rename.

Upvotes: 0

Views: 102

Answers (1)

kmdreko
kmdreko

Reputation: 59817

The opposite of None is Some:

let foo = Foo::Bar{ baz: None };
match foo {
    Foo::Bar{ baz: Some(_) } => println!("Bar with some"),
    Foo::Bar{ baz: None } => println!("Bar with none"),
}

Upvotes: 3

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