Enum Expr 

pub enum Expr {
    Ref(String),
    Lit(Literal),
    Add {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Sub {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Mul {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Div {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Round {
        value: Box<Expr>,
        scale: u32,
    },
    Fx {
        amount: Box<Expr>,
        from: Box<Expr>,
        to: Box<Expr>,
        rates: String,
        scale: u32,
    },
    Len(Box<Expr>),
    ToDecimal(Box<Expr>),
    Graded {
        reference: String,
        require: GradeRequirement,
    },
}

Expressions inside exact-operator arguments and policy predicates (registry rustev.exact/1). References are input:<name>, step:<id>, item:<field>[.<field>...] (inside a per-item operator) and now.

Variants

Ref(String)

Lit(Literal)

Add

Fields

left: Box<Expr>

right: Box<Expr>

Sub

Fields

left: Box<Expr>

right: Box<Expr>

Mul

Decimal product rounded half-even to 10^-9; integers are exact.

Fields

left: Box<Expr>

right: Box<Expr>

Div

Decimal quotient rounded half-even to 10^-9.

Fields

left: Box<Expr>

right: Box<Expr>

Round

Rescale a decimal half-even to scale digits.

Fields

value: Box<Expr>

scale: u32

Fx

Currency conversion through a rate table (fx_convert@1 semantics).

Fields

amount: Box<Expr>

from: Box<Expr>

to: Box<Expr>

rates: String

scale: u32

Len(Box<Expr>)

Length of a list.

ToDecimal(Box<Expr>)

Integer to decimal, the only numeric conversion.

Graded

Registry rustev.exact/2: a reference with a grade requirement (spec 032, 3.9.1).

Fields

reference: String

require: GradeRequirement

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 Eq for Expr

impl JsonSchema for Expr

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

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