Enum QualityEncoding 

pub enum QualityEncoding {
    Phred33,
    Phred64,
}

The ASCII offset used by a FASTQ quality string.

Deliberately not #[non_exhaustive]: these two are the whole of the offset-encoded world. Solexa’s old scheme is not a third offset but a different formula, so it could not join this enum without changing what QualityEncoding::offset means.

Variants

Phred33

Sanger / Illumina 1.8+ / PacBio / Nanopore: ! == Q0.

Phred64

Illumina 1.3–1.7: @ == Q0.

Implementations

impl QualityEncoding

pub const fn offset(self) -> u8

The ASCII offset for this encoding.

pub fn detect(quality: &[u8]) -> Option<QualityEncoding>

Guess the encoding from observed quality characters.

Returns None when the sample is compatible with both encodings, which is common for short high-quality samples — callers should then keep their current default rather than guessing.

use fastx::qual::QualityEncoding;
assert_eq!(QualityEncoding::detect(b"!!##$$"), Some(QualityEncoding::Phred33));
assert_eq!(QualityEncoding::detect(b"hhhhhh"), Some(QualityEncoding::Phred64));
assert_eq!(QualityEncoding::detect(b"IIIIII"), None);

Trait Implementations

impl Clone for QualityEncoding

fn clone(&self) -> QualityEncoding

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for QualityEncoding

impl Debug for QualityEncoding

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

Formats the value using the given formatter.

impl Default for QualityEncoding

fn default() -> QualityEncoding

Returns the “default value” for a type.

impl Eq for QualityEncoding

impl Hash for QualityEncoding

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for QualityEncoding

fn eq(&self, other: &QualityEncoding) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for QualityEncoding