Enum Index

pub enum Index {
    FromStart(JsonUInt),
    FromEnd(JsonNonZeroUInt),
}

Directional index into a JSON array.

Variants

FromStart(JsonUInt)

Zero-based index from the start of the array.

FromEnd(JsonNonZeroUInt)

Index from the end of the array.

-1 is the last element, -2 is the second last, etc.

Implementations

impl Index

pub const fn is_start_based(&self) -> bool

Check if this is an index counting from the start of an array.

Examples

let index = Index::FromStart(0.into());
assert!(index.is_start_based());

pub const fn is_end_based(&self) -> bool

Check if this is an index counting from the end of an array.

Examples

let index = Index::FromEnd(1.try_into().unwrap());
assert!(index.is_end_based());

Trait Implementations

impl<'a> Arbitrary<'a> for Index

Available on crate feature arbitrary only.

fn arbitrary(u: &mut Unstructured<'a>) -> Result<Self>

Generate an arbitrary value of Self from the given unstructured data.

fn arbitrary_take_rest(u: Unstructured<'a>) -> Result<Self, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data.

fn size_hint(depth: usize) -> (usize, Option<usize>)

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

fn try_size_hint( depth: usize, ) -> Result<(usize, Option<usize>), MaxRecursionReached>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself.

impl Clone for Index

fn clone(&self) -> Index

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Index

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Index

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Index

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

Formats the value using the given formatter.

impl From<Index> for Selector

fn from(value: Index) -> Self

Converts to this type from the input type.

impl<N: Into<JsonInt>> From<N> for Index

fn from(value: N) -> Self

Converts to this type from the input type.

impl Hash for Index

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 Index

fn eq(&self, other: &Index) -> 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 Serialize for Index

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Index

impl Eq for Index

impl StructuralPartialEq for Index