Enum ParseNodeError 

pub enum ParseNodeError {
    TypeMismatch {
        expected: NodeType,
        actual: String,
    },
    NotSymbolNode {
        actual: String,
    },
}

Errors that can occur during parse node validation and type checking.

This enum represents the various error conditions that can arise when working with parse nodes, particularly during type assertions and validation.

The error type implements std::error::Error and std::fmt::Display for proper error handling and reporting throughout the KaTeX pipeline.

Usage

These errors are typically returned by:

• assert_node_type - When type assertion fails
• assert_symbol_node_type - When symbol node assertion fails

They provide detailed information about what went wrong during node validation, helping with debugging and error reporting in parsing and rendering operations.

Error Messages

Error messages are designed to be informative and include both the expected and actual types to aid in troubleshooting type-related issues.

Variants

TypeMismatch

A node has an unexpected type during type checking

Fields

expected: NodeType

The expected NodeType that the node should have

actual: String

The actual type as a string representation

NotSymbolNode

A node is not one of the symbol node types

Fields

actual: String

The actual node type as a string

Trait Implementations

impl Debug for ParseNodeError

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

Formats the value using the given formatter.

impl Display for ParseNodeError

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

Formats the value using the given formatter.

impl Error for ParseNodeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ParseNodeError> for ParseError

Convert ParseNodeError to ParseError

fn from(err: ParseNodeError) -> Self

Converts to this type from the input type.

impl From<ParseNodeError> for ParseErrorKind

fn from(source: ParseNodeError) -> Self

Converts to this type from the input type.

impl PartialEq for ParseNodeError

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

impl StructuralPartialEq for ParseNodeError