Enum Value

pub enum Value {
    String(String),
    Array(Vec<String>),
}

A GFF record attribute field value.

Variants

String(String)

A string.

Array(Vec<String>)

An array.

Implementations

impl Value

pub fn as_string(&self) -> Option<&str>

Returns the value as a string, if the value is a string.

Examples

use noodles_gff::record::attributes::field::Value;

let value = Value::from("ndls");
assert_eq!(value.as_string(), Some("ndls"));

let value = Value::from(vec![String::from("ndls0"), String::from("ndls1")]);
assert!(value.as_string().is_none());

pub fn as_array(&self) -> Option<&[String]>

Returns the value as an array, if the value is an array.

Examples

use noodles_gff::record::attributes::field::Value;

let raw_values = vec![String::from("ndls0"), String::from("ndls1")];
let value = Value::from(raw_values.clone());
assert_eq!(value.as_array(), Some(&raw_values[..]));

let value = Value::from("ndls");
assert!(value.as_array().is_none());

pub fn iter(&self) -> Box<dyn Iterator<Item = &String> + '_>

An iterator over values.

Examples

use noodles_gff::record::attributes::field::Value;

let value = Value::from("ndls");
let mut iter = value.iter();
assert_eq!(iter.next(), Some(&String::from("ndls")));
assert!(iter.next().is_none());

let value = Value::from(vec![String::from("ndls0"), String::from("ndls1")]);
let mut iter = value.iter();
assert_eq!(iter.next(), Some(&String::from("ndls0")));
assert_eq!(iter.next(), Some(&String::from("ndls1")));
assert!(iter.next().is_none());

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Display for Value

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

Formats the value using the given formatter.

impl Extend<String> for Value

fn extend<T: IntoIterator<Item = String>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl From<&str> for Value

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<String> for Value

fn from(s: String) -> Self

Converts to this type from the input type.

impl From<Vec<String>> for Value

fn from(values: Vec<String>) -> Self

Converts to this type from the input type.

impl FromStr for Value

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl<'a> IntoIterator for &'a Value

type Item = &'a String

The type of the elements being iterated over.

type IntoIter = Box<dyn Iterator<Item = <&'a Value as IntoIterator>::Item> + 'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for Value

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Value

impl StructuralPartialEq for Value