struct LazyValue<T> {
    position: NonZeroUsize,
    _marker: PhantomData<fn() -> T>,
}
Expand description

A value of type T referred to by its absolute position in the metadata, and which can be decoded lazily.

Metadata is effective a tree, encoded in post-order, and with the root’s position written next to the header. That means every single LazyValue points to some previous location in the metadata and is part of a larger node.

The first LazyValue in a node is encoded as the backwards distance from the position where the containing node starts and where the LazyValue points to, while the rest use the forward distance from the previous LazyValue. Distances start at 1, as 0-byte nodes are invalid. Also invalid are nodes being referred in a different order than they were encoded in.

Fields

position: NonZeroUsize_marker: PhantomData<fn() -> T>

Implementations

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes