Enum DExpr 

pub enum DExpr {
    Col(String),
    LitInt(i64),
    LitFloat(f64),
    LitBool(bool),
    LitStr(String),
    BinOp {
        op: BinOp,
        left: Box<DExpr>,
        right: Box<DExpr>,
    },
    Not(Box<DExpr>),
    And(Box<DExpr>, Box<DExpr>),
    Or(Box<DExpr>, Box<DExpr>),
}

Data expression — used in filter predicates and mutate computations.

Variants

Col(String)

Column reference: col(“name”)

LitInt(i64)

Literal integer

LitFloat(f64)

Literal float

LitBool(bool)

Literal bool

LitStr(String)

Literal string

BinOp

Binary operation

Fields

op: BinOp

left: Box<DExpr>

right: Box<DExpr>

Not(Box<DExpr>)

Unary NOT

And(Box<DExpr>, Box<DExpr>)

AND of two boolean expressions

Or(Box<DExpr>, Box<DExpr>)

OR of two boolean expressions

Trait Implementations

impl Clone for DExpr

fn clone(&self) -> DExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DExpr

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

Formats the value using the given formatter.