Struct Expression

pub struct Expression {
    pub value: ExpressionEnum,
    pub span: Span,
}

The expression type.

Fields

value: ExpressionEnum

The type of expression.

span: Span

The location of the expression.

Implementations

impl Expression

pub fn expect<T>(&self) -> Result<T>

where ExpressionEnum: AsVariant<T>, T: Clone,

Downcast this expression to its inner type. Returns an ErrorType::UnexpectedExpression when T is not the type of the inner expression.

Examples

use vyder_core::prelude::*;

let expression: Expression = Expression { value: expressions::Number { value: 0.0 }.into(), span: Span::new((1, 1, 0), "example") };
assert!(expression.expect::<expressions::False>().is_err());
let number_expression: expressions::Number = expression.expect::<expressions::Number>().unwrap();
assert_eq!(number_expression.value, 0.0);

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 Display 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