Enum beancount_parser::amount::Expression

#[non_exhaustive]
pub enum Expression {
    Value(Value),
    Operation(Operation),
}

An expression

Examples of expressions:

• 42
• 2 + 2
• 5 / (6 + (8 / 2))

The expression can be evaluated with Expression::evaluate

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Value(Value)

A direct value, the leaf of the expression tree

Operation(Operation)

An operation, made of two expression operands

Implementations

impl Expression

pub fn evaluate(&self) -> Value

Evaluate the expression

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<Expression> 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 StructuralPartialEq for Expression