Enum Query

pub enum Query<'a> {
    Index {
        index: usize,
        from_last: bool,
    },
    Key(Cow<'a, str>),
}

Either a key or an index query

Variants

Index

The index query. Represents the index (starting at 0) from either the front or the back

Fields

index: usize

from_last: bool

Key(Cow<'a, str>)

The key query. Represents string key to query by

Implementations

impl Query<'static>

pub fn index(index: usize) -> Self

Create an index query from the front

pub fn index_from_last(index: usize) -> Self

Create an index query from the back

pub fn key_owned(key: String) -> Self

Create a owned key query

impl<'a> Query<'a>

pub fn key(key: &'a str) -> Self

Create a borrowed key query

pub fn is_from_last(&self) -> bool

Is an index query from the back

pub fn is_key(&self) -> bool

Is a key query

pub fn is_index(&self) -> bool

Is an index query

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

Return the string reference if it is a key query

pub fn as_index(&self) -> Option<i64>

Returns an i64 representation of the index if it is a index query. This is either the index or 0 - index - 1 for an index from the back

pub fn to_owned(&self) -> Query<'static>

An alternative to the std::borrow::ToOwned method

Trait Implementations

impl<'a> Clone for Query<'a>

fn clone(&self) -> Query<'static>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Query<'a>

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

Formats the value using the given formatter.

impl<'a> From<&'a str> for Query<'a>

fn from(key: &'a str) -> Self

Converts to this type from the input type.

impl From<String> for Query<'static>

fn from(key: String) -> Self

Converts to this type from the input type.

impl From<i16> for Query<'static>

fn from(index: i16) -> Self

Converts to this type from the input type.

impl From<i32> for Query<'static>

fn from(index: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Query<'static>

fn from(index: i64) -> Self

Converts to this type from the input type.

impl From<i8> for Query<'static>

fn from(index: i8) -> Self

Converts to this type from the input type.

impl From<isize> for Query<'static>

fn from(index: isize) -> Self

Converts to this type from the input type.

impl From<u16> for Query<'static>

fn from(index: u16) -> Self

Converts to this type from the input type.

impl From<u32> for Query<'static>

fn from(index: u32) -> Self

Converts to this type from the input type.

impl From<u64> for Query<'static>

fn from(index: u64) -> Self

Converts to this type from the input type.

impl From<u8> for Query<'static>

fn from(index: u8) -> Self

Converts to this type from the input type.

impl From<usize> for Query<'static>

fn from(index: usize) -> Self

Converts to this type from the input type.

impl<'a> PartialEq for Query<'a>

fn eq(&self, other: &Query<'a>) -> 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<'a> Eq for Query<'a>

impl<'a> StructuralPartialEq for Query<'a>