Struct Fasta 

pub struct Fasta { /* private fields */ }

A loaded FASTA reference with random-access sequence retrieval.

Wraps a noodles IndexedReader for efficient seek-based access. Contig metadata (names, lengths) is pre-computed from the .fai index at construction time.

Implementations

impl Fasta

pub fn from_path(path: &Path) -> Result<Self>

Open a FASTA file and its .fai index.

The .fai file must exist alongside the FASTA (e.g. ref.fa.fai).

Errors

Returns an error if the FASTA or its index cannot be read.

pub fn dict(&self) -> &SequenceDictionary

Return a reference to the underlying sequence dictionary.

pub fn load_contig(&mut self, contig_name: &str) -> Result<Vec<u8>>

Load and return the full sequence of contig_name as uppercase bytes.

Uses seek-based access via the FAI index for efficiency, avoiding the intermediate Record allocation that query() performs.

Errors

Returns an error if the contig is unknown or the FASTA cannot be read.

pub fn contig_names(&self) -> Vec<&str>

Return contig names in index order.