Struct Reader 

pub struct Reader { /* private fields */ }

A reader with random access to samples (fixed sample size).

Implementations

impl Reader

pub fn open(path: &Path) -> Result<Reader>

Opens a file and reads its header; the layout is derived from the type when it is closed (E9001 is deferred to Reader::layout).

pub fn with_layout(self, layout: Layout) -> Result<Reader>

Supplies the layout of a params M file (from the program).

A params file records its model’s name and not its leaves’ shapes, so the layout comes from the program at the dimensions it is opened with, and the file must then be exactly the size that layout implies. A longer file is not a truncation check passing: it is a model of other dimensions, and decoding it by this layout would read every leaf after the first mismatch from the wrong offsets (0.6.0 step 5d, D48 — pos : ℝ[T, D] trained at T = 256 and opened at T = 32).

pub fn params_reals(&mut self) -> Result<Vec<f64>>

Every value of a params M file, in file order, without its layout. A parameter tree holds only reals, stored as f64, so two checkpoints of one model can be compared value for value without the program that gives the tree its shape (presk data diff).

pub fn header(&self) -> &Header

pub fn layout(&self) -> Result<&Layout>

The layout, or E9001 when the type needs the program.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn get(&mut self, i: usize) -> Result<Value>

The i-th sample.

pub fn read_all(&mut self) -> Result<Vec<Value>>

All samples, in file order.

Trait Implementations

impl Debug for Reader

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.