Enum Expr 

pub enum Expr {
    Number(f64),
    Text(String),
    Bool(bool),
    Var(String),
    Call {
        name: String,
        args: Vec<Self>,
    },
    Unary {
        op: UnOp,
        expr: Box<Self>,
    },
    Binary {
        left: Box<Self>,
        op: BinOp,
        right: Box<Self>,
    },
}

A node in the expression AST.

Variants

Number(f64)

Numeric literal.

Text(String)

String literal.

Bool(bool)

Boolean literal.

Var(String)

Variable read, e.g. $gold.

Call

Function call, e.g. random(1, 6).

Fields

name: String

Function name.

args: Vec<Self>

Argument expressions.

Unary

Unary operator.

Fields

op: UnOp

Operator.

expr: Box<Self>

Operand.

Binary

Binary operator.

Fields

left: Box<Self>

Left operand.

op: BinOp

Operator.

right: Box<Self>

Right operand.

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 PartialEq for Expr

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Expr