Enum valuable::Fields

pub enum Fields<'a> {
    Named(&'a [NamedField<'a>]),
    Unnamed(usize),
}

Data stored within a Structable or an Enumerable.

Variants

Named(&'a [NamedField<'a>])

Named fields

Unnamed(usize)

Unnamed (positional) fields or unit

The usize value represents the number of fields.

Implementations

impl Fields<'_>

pub const fn is_named(&self) -> bool

Returns true if the fields are named.

Examples

Named fields

use valuable::Fields;

let fields = Fields::Named(&[]);
assert!(fields.is_named());

Unnamed fields

use valuable::Fields;

let fields = Fields::Unnamed(2);
assert!(!fields.is_named());

pub const fn is_unnamed(&self) -> bool

Returns true if the fields are unnamed.

Examples

Named fields

use valuable::Fields;

let fields = Fields::Named(&[]);
assert!(!fields.is_unnamed());

Unnamed fields

use valuable::Fields;

let fields = Fields::Unnamed(3);
assert!(fields.is_unnamed());

pub const fn len(&self) -> usize

Returns the number of fields.

Examples

Named fields

use valuable::{Fields, NamedField};

let fields = &[
    NamedField::new("alice"),
    NamedField::new("bob"),
];
let fields = Fields::Named(fields);

assert_eq!(fields.len(), 2);

Unnamed fields

use valuable::Fields;

let fields = Fields::Unnamed(2);
assert_eq!(fields.len(), 2);

pub const fn is_empty(&self) -> bool

Returns true if this set of fields defines no fields.

Examples

Named fields

use valuable::{Fields, NamedField};

let fields = &[
    NamedField::new("alice"),
    NamedField::new("bob"),
];
let non_empty = Fields::Named(fields);

let empty = Fields::Named(&[]);

assert!(!non_empty.is_empty());
assert!(empty.is_empty());

Unnamed fields

use valuable::Fields;

let non_empty = Fields::Unnamed(2);
let empty = Fields::Unnamed(0);

assert!(!non_empty.is_empty());
assert!(empty.is_empty());

Trait Implementations

impl<'a> Debug for Fields<'a>

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

Formats the value using the given formatter.