Struct rule::rule::Expr

pub struct Expr { /* fields omitted */ }

The Expression type, contains a Op and a Vec<Arg>.

Methods

impl Expr

pub fn new(val: Json) -> Result<Expr>

Constructs an new Expr from a serde Json Value object.

pub fn from_vec(val: Vec<Json>) -> Result<Expr>

Constructs an new Expr from a Vec of Json object.

pub fn matches<T: Serialize>(&self, context: &T) -> Result<Arg>

Matches the expression with a Serialize context.

pub fn matches_json(&self, context: &Json) -> Result<Arg>

Matches the expression with a Json context.

pub fn matches_json_dict(&self, context: &Map<String, Json>) -> Result<Arg>

Matches the expression with a Json Dict context.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq<Expr> for Expr

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

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

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

This method tests for !=.

impl PartialOrd<Expr> for Expr

fn partial_cmp(&self, other: &Expr) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Expr) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Expr) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Expr) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Expr) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Debug for Expr

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

Formats the value using the given formatter.