Enum AttrExp 

pub enum AttrExp {
    Present(AttrPath),
    Comparison(AttrPath, CompareOp, CompValue),
}

An atomic filter expression: a presence test or an attribute comparison.

// "title pr" — attribute is present and non-null
let present = AttrExp::Present(AttrPath::with_name("title"));
assert_eq!(Filter::Attr(present).to_string(), "title pr");

// "userName eq \"bjensen\""
let cmp = AttrExp::Comparison(
    AttrPath::with_name("userName"),
    CompareOp::Eq,
    "bjensen".into(),
);
assert_eq!(Filter::Attr(cmp).to_string(), r#"userName eq "bjensen""#);

Variants

Present(AttrPath)

The pr (present) operator. Matches when the attribute exists and is not null.

Example: title pr

Comparison(AttrPath, CompareOp, CompValue)

A comparison operator with a value.

Example: userName eq "bjensen", meta.lastModified gt "2024-01-01T00:00:00Z"

Trait Implementations

impl Clone for AttrExp

fn clone(&self) -> AttrExp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttrExp

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

Formats the value using the given formatter.

impl Display for AttrExp

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

Formats the value using the given formatter.

impl PartialEq for AttrExp

fn eq(&self, other: &AttrExp) -> 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 StructuralPartialEq for AttrExp