Enum PathElement 

pub enum PathElement<'a> {
    Key(&'a str),
    Index(usize),
    IndexFromEnd(usize),
}

A path element for navigating into nested data structures.

Used with LookupResult::decode_path() to selectively decode specific fields without parsing the entire record.

Creating Path Elements

You can create path elements directly or use the path! macro for a more convenient syntax:

use maxminddb::{path, PathElement};

// Direct construction
let path = [PathElement::Key("country"), PathElement::Key("iso_code")];

// Using the macro - string literals become Keys, integers become Indexes
let path = path!["country", "iso_code"];
let path = path!["subdivisions", 0, "names"];  // Mixed keys and indexes
let path = path!["array", -1];  // Negative indexes count from the end

Variants

Key(&'a str)

Navigate into a map by key.

Index(usize)

Navigate into an array by index (0-based from the start).

• Index(0) - first element
• Index(1) - second element

IndexFromEnd(usize)

Navigate into an array by index from the end.

• IndexFromEnd(0) - last element
• IndexFromEnd(1) - second-to-last element

Trait Implementations

impl<'a> Clone for PathElement<'a>

fn clone(&self) -> PathElement<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for PathElement<'a>

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

Formats the value using the given formatter.

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

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

Converts to this type from the input type.

impl From<i32> for PathElement<'_>

fn from(n: i32) -> Self

Converts an integer to a path element.

• Non-negative values become Index(n)
• Negative values become IndexFromEnd(-n - 1), so -1 is the last element

impl From<isize> for PathElement<'_>

fn from(n: isize) -> Self

Converts a signed integer to a path element.

• Non-negative values become Index(n)
• Negative values become IndexFromEnd(-n - 1), so -1 is the last element

impl From<usize> for PathElement<'_>

fn from(n: usize) -> Self

Converts to this type from the input type.

impl<'a> PartialEq for PathElement<'a>

fn eq(&self, other: &PathElement<'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 PathElement<'a>

impl<'a> StructuralPartialEq for PathElement<'a>