Enum EvaluationError 

pub enum EvaluationError {
    UnexpectedElements {
        last_expected: Option<SyntaxNode>,
        unexpected_elements: Vec<SyntaxNode>,
    },
    UnknownSymbol {
        symbol: String,
    },
    InvalidArguments {
        description: Option<String>,
        arguments: Vec<SyntaxNode>,
    },
    InvalidValues {
        description: Option<String>,
        values: Vec<String>,
    },
}

An error that can happen during evaluation.

Used by an Evaluator or Function to indicate that something bad happened. This is a very short description of what is happening - it can be created in a much narrow context, and then wrapped by an SyntaxError in a context where more info can be supplied.

It is intended to be used in cases when you don’t want to pass all unused data just in case to be able to create an SyntaxError if it happens. It contains only the most necessary info about the error.

Variants

UnexpectedElements

Fields

last_expected: Option<SyntaxNode>

unexpected_elements: Vec<SyntaxNode>

UnknownSymbol

Fields

symbol: String

InvalidArguments

Fields

description: Option<String>

arguments: Vec<SyntaxNode>

InvalidValues

Fields

description: Option<String>

values: Vec<String>

Trait Implementations

impl Debug for EvaluationError

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

Formats the value using the given formatter.

impl PartialEq for EvaluationError

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