Type Definition specs::ReadExpect

source ·
pub type ReadExpect<'a, T> = Read<'a, T, PanicHandler>;
Expand description

Allows to fetch a resource in a system immutably. This will panic if the resource does not exist. Usage of Read or Option<Read> is therefore recommended.

If the nightly feature of shred is enabled, this will print the type of the resource in case of a panic. That can help for debugging.

Trait Implementations

Type of joined components.
Type of joined storages.
Type of joined bit mask.
Open this join by returning the mask and the storages. Read more
Get a joined component value by a given index.
If this Join typically returns all indices in the mask, then iterating over only it or combined with other joins that are also dangerous will cause the JoinIter/ParJoin to go through all indices which is usually not what is wanted and will kill performance. Read more
Create a joined iterator over the contents.
Returns a Join-able structure that yields all indices, returning None for all missing elements and Some(T) for found elements. Read more
Create a joined parallel iterator over the contents.