Enum Expr 

pub enum Expr {
    Literal(Literal),
    Logical(LogicalData),
    Unary(UnaryData),
    Binary(BinaryData),
    Grouping(GroupingData),
    Variable(VariableData),
    Assign(AssignData),
    Call(CallData),
    Get(GetData),
    Set(SetData),
    This(ThisData),
    Super(SuperData),
}

Represents an expression in the language.

Variants

Literal(Literal)

A literal value.

• 1
• "hello"
• true
• null

Logical(LogicalData)

A logical expression.

• true and false
• 1 or "hello"

Unary(UnaryData)

An unary expression.

• -1
• !true

Binary(BinaryData)

A binary expression.

• 1 + 2
• 1 != 2
• 1 <= 2
• 1 / 2

Grouping(GroupingData)

A grouping expression.

• (1 + 2)
• (true and false) or (1 <= 2)
• ((1 + 2) * 3) / 4

Variable(VariableData)

A variable expression.

• x

Assign(AssignData)

An assignment expression.

• x = 1
• x = "hello"
• x = func()

Call(CallData)

A call expression.

• func()
• func(arg1, 23)
• instance.method()

Get(GetData)

A get expression.

• instance.property
• instance.property.method()

Set(SetData)

A set expression.

• instance.property = 1
• instance.property = "hello"

This(ThisData)

A this expression.

• this
• this.property

Super(SuperData)

A super expression.

• super.method()
• super.method(arg1, 23)

Implementations

impl Expr

pub fn accept<T>(&self, visitor: &mut impl ExprVisitor<T>) -> T

Accepts a visitor and returns the result of the visit. This is used to implement the visitor pattern.

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 Eq for Expr

impl StructuralPartialEq for Expr