Enum Expr 

pub enum Expr {
    Lit(Value),
    Dur(i64),
    Now,
    Path {
        root: Root,
        path: Vec<Seg>,
    },
    Not(Box<Expr>),
    Neg(Box<Expr>),
    Bin {
        op: BinOp,
        l: Box<Expr>,
        r: Box<Expr>,
    },
    Coalesce(Box<Expr>, Box<Expr>),
    If {
        c: Box<Expr>,
        t: Box<Expr>,
        e: Box<Expr>,
    },
    Array(Vec<Expr>),
    In {
        l: Box<Expr>,
        r: Box<Expr>,
        negate: bool,
    },
    Method {
        obj: Box<Expr>,
        name: String,
        args: Vec<Expr>,
    },
    Call {
        name: String,
        args: Vec<Expr>,
    },
}

A compiled expression.

Variants

Lit(Value)

A literal JSON value.

Dur(i64)

A duration literal, in seconds. It adds to or subtracts from a time.

Now

now(): the time the step runs, as RFC 3339 text.

Path

A path.

Fields

root: Root

Where it starts.

path: Vec<Seg>

What it walks.

Not(Box<Expr>)

!x

Neg(Box<Expr>)

-x

Bin

l op r

Fields

op: BinOp

The operator.

l: Box<Expr>

Left side.

r: Box<Expr>

Right side.

Coalesce(Box<Expr>, Box<Expr>)

l ?? r: l, unless it is null.

If

c ? t : e

Fields

c: Box<Expr>

The condition.

t: Box<Expr>

When it holds.

e: Box<Expr>

When it does not.

Array(Vec<Expr>)

[a, b]

In

l in r (or not in when negate): membership of an array, a substring of a string.

Fields

l: Box<Expr>

What is looked for.

r: Box<Expr>

What is searched.

negate: bool

not in.

Method

obj.name(args): length, contains, includes, starts_with, ends_with.

Fields

obj: Box<Expr>

The receiver.

name: String

The method.

args: Vec<Expr>

Its arguments.

Call

name(args): new_uuid, coalesce, len, or a function the workflow declares.

Fields

name: String

The function.

args: Vec<Expr>

Its arguments.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expr

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Expr

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Expr

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Expr