Enum Expr 

pub enum Expr {
    Literal(Value),
    Ref(MeasureId, DimensionSpec),
    UnaryOp(UnaryOp, Box<Expr>),
    BinaryOp(BinaryOp, Box<Expr>, Box<Expr>),
    Call(FuncId, Vec<Expr>),
    Category(CategoryId),
}

A formula expression. Broadcasting over shared dimensions is implicit at the language level and made explicit by the compiler (Phase 1).

Variants

Literal(Value)

Ref(MeasureId, DimensionSpec)

Reference another measure, with an optional dimension projection.

UnaryOp(UnaryOp, Box<Expr>)

BinaryOp(BinaryOp, Box<Expr>, Box<Expr>)

Call(FuncId, Vec<Expr>)

Category(CategoryId)

A category named as a function argument (POSITION(Time), PREV(x, Time)); not a value on its own.

Implementations

impl Expr

pub fn referenced_measures(&self) -> Vec<MeasureId>

Every measure this expression references, in traversal order (with duplicates). Used to build the dependency graph.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

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: &Expr) -> 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