Module zst_query

Checks for queries that query for a zero-sized type.

Motivation

Zero-sized types (ZSTs) are types that have no size as a result of containing no runtime data. In Bevy, such types are often used as marker components and are best used as filters.

Example

#[derive(Component)]
struct Player;

fn move_player(mut query: Query<(&mut Transform, &Player)>) {
    // ...
}

Use instead:

#[derive(Component)]
struct Player;

fn move_player(query: Query<&mut Transform, With<Player>>) {
    // ...
}

Structs

• ZstQuery

Statics

• ZST_QUERY
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