Struct balena_temen::ast::Expression

pub struct Expression {
    pub value: ExpressionValue,
    pub negated: bool,
    pub filters: Vec<FunctionCall>,
}

An expression

Fields

value: ExpressionValue

An expression value

negated: bool

Is expression negated?

filters: Vec<FunctionCall>

List of filters to apply

Methods

impl Expression

pub fn new(value: ExpressionValue) -> Expression

Creates new expression

Expression is not negated and no filters are applied.

Arguments

• value - An expression value

pub fn new_negated(value: ExpressionValue) -> Expression

Creates new negated expression

Expression is negated and no filters are applied.

Arguments

• value - An expression value

pub fn new_with_filters(
    value: ExpressionValue,
    filters: Vec<FunctionCall>
) -> Expression

Creates new expression

Expression is not negated and filters are applied.

Arguments

• value - An expression value
• filters - List of filters to apply

pub fn into_negated(self) -> Expression

Converts self into negated expression

pub fn identifier(&self) -> Option<&Identifier>

Returns identifier from an expression value

pub fn into_identifier(self) -> Result<Identifier>

Converts self into Identifier

Trait Implementations

impl PartialEq<Expression> for Expression

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

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

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

This method tests for !=.

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl FromStr for Expression

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Expression>

Parses a string s to return a value of this type.