Enum MathError 

pub enum MathError {
    UnsupportedCommand {
        name: String,
        span: Span,
    },
    Malformed {
        what: String,
        at: usize,
    },
    UnmappedChar {
        ch: char,
        span: Span,
    },
}

Why a source string failed to parse (or, later, to lay out).

The shape is frozen by the G0-3 ratification note: three variants, with the construct name of an unsupported command carried verbatim in the construct table’s naming scheme (\substack, env:flushleft, …).

Variants

UnsupportedCommand

A construct outside the implemented surface. name is in the G0-4 construct-table scheme (\substack, env:flushleft); the tier tag in the rendered message comes from the registry.

Fields

name: String

Construct name, table scheme.

span: Span

Source span of the offending construct.

Malformed

Structurally invalid input (unbalanced braces, a double superscript, \right without \left, …).

Fields

what: String

What is wrong, in one clause.

at: usize

Byte offset of the offense.

UnmappedChar

A character with no glyph in the bundled math faces (a layout-stage error; the parser accepts every character).

Fields

ch: char

The character.

span: Span

Its source span.

Implementations

impl MathError

pub fn span(&self) -> Span

The byte span the error points at.

pub fn unsupported_construct(&self) -> Option<&str>

For MathError::UnsupportedCommand, the construct name in the construct-table scheme; the ratchet counts by this.

Trait Implementations

impl Clone for MathError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MathError

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

Formats the value using the given formatter.

impl Display for MathError

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

Formats the value using the given formatter.

impl Eq for MathError

impl Error for MathError

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 PartialEq for MathError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MathError