Enum dust_lang::expression::Expression

pub enum Expression {
    Value(ValueNode),
    Identifier(Identifier),
    Index(Box<Index>),
    Math(Box<Math>),
    Logic(Box<Logic>),
    FunctionCall(Box<FunctionCall>),
    Yield(Box<Yield>),
}

Abstract representation of an expression statement.

Unlike statements, which can involve complex logic, an expression is expected to evaluate to a value. However, an expression can still contain nested statements and may evaluate to an empty value.

Variants

Value(ValueNode)

Identifier(Identifier)

Index(Box<Index>)

Math(Box<Math>)

Logic(Box<Logic>)

FunctionCall(Box<FunctionCall>)

Yield(Box<Yield>)

Trait Implementations

impl AbstractTree for Expression

fn from_syntax_node(source: &str, node: Node<'_>, context: &Map) -> Result<Self>

Interpret the syntax tree at the given node and return the abstraction.

fn run(&self, source: &str, context: &Map) -> Result<Value>

Execute dust code by traversing the tree.

fn expected_type(&self, context: &Map) -> Result<Type>

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<'de> Deserialize<'de> for Expression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Ord for Expression

fn cmp(&self, other: &Expression) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Expression

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Expression

fn partial_cmp(&self, other: &Expression) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Expression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Expression

impl StructuralEq for Expression

impl StructuralPartialEq for Expression