Struct promql_parser::parser::ast::VectorSelector

pub struct VectorSelector {
    pub name: Option<String>,
    pub matchers: Matchers,
    pub offset: Option<Offset>,
    pub at: Option<AtModifier>,
}

Fields

name: Option<String>

matchers: Matchers

offset: Option<Offset>

at: Option<AtModifier>

Implementations

impl VectorSelector

pub fn new(name: Option<String>, matchers: Matchers) -> Self

Trait Implementations

impl Clone for VectorSelector

fn clone(&self) -> VectorSelector

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VectorSelector

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

Formats the value using the given formatter.

impl Default for VectorSelector

fn default() -> Self

Returns the “default value” for a type.

impl Display for VectorSelector

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

Formats the value using the given formatter.

impl From<&str> for VectorSelector

directly create an instant vector with only METRIC_NAME matcher.

Examples

Basic usage:

use promql_parser::label::Matchers;
use promql_parser::parser::VectorSelector;

let vs = VectorSelector {
    name: Some(String::from("foo")),
    offset: None,
    at: None,
    matchers: Matchers::empty(),
};

assert_eq!(VectorSelector::from("foo"), vs);

fn from(name: &str) -> Self

Converts to this type from the input type.

impl From<String> for VectorSelector

fn from(name: String) -> Self

Converts to this type from the input type.

impl From<VectorSelector> for Expr

directly create an Expr::VectorSelector from instant vector

Examples

Basic usage:

use promql_parser::label::Matchers;
use promql_parser::parser::{Expr, VectorSelector};

let name = String::from("foo");
let vs = VectorSelector::new(Some(name), Matchers::empty());

assert_eq!(Expr::VectorSelector(vs), Expr::from(VectorSelector::from("foo")));

fn from(vs: VectorSelector) -> Self

Converts to this type from the input type.

impl Neg for VectorSelector

type Output = UnaryExpr

The resulting type after applying the - operator.

fn neg(self) -> Self::Output

Performs the unary - operation.

impl PartialEq<VectorSelector> for VectorSelector

fn eq(&self, other: &VectorSelector) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Prettier for VectorSelector

fn needs_split(&self, _max: usize) -> bool

override needs_split to return false, in order not to split multiple lines

fn pretty(&self, level: usize, max: usize) -> String

max param is short for max_characters_per_line.

fn format(&self, level: usize, _max: usize) -> String

override format if expr needs to be splited into multiple lines

impl Eq for VectorSelector

impl StructuralEq for VectorSelector

impl StructuralPartialEq for VectorSelector