Enum Expression

pub enum Expression {
    Binary(Box<Expression>, TokenType, Box<Expression>),
    Unary(TokenType, Box<Expression>),
    Var(String),
    Func(String, Vec<Box<Expression>>),
    Literal(Value),
    Union(Vec<Box<Expression>>),
}

Every expression variant.

Variants

Binary(Box<Expression>, TokenType, Box<Expression>)

A binary operation between two expression.

Unary(TokenType, Box<Expression>)

An unary operation to an expression.

Var(String)

A variable.

Func(String, Vec<Box<Expression>>)

A function call and its parameters.

Literal(Value)

A literal value.

Union(Vec<Box<Expression>>)

A union of values.

Implementations

impl Expression

pub fn eval( &self, context: &Context, scope: Option<&Context>, depth: u32, ) -> EvalResult<Value>

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 Expression