Enum ExpressionError 

#[non_exhaustive]
pub enum ExpressionError {
    UnexpectedCharacter(char),
    MissingOperand,
    MissingOperator(String),
    UnbalancedParenthesis,
    NoSymbol,
    UnknownSymbol(String),
    TooComplex,
}

Why text is not a SymbolExpression, or why one cannot be charted.

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.

UnexpectedCharacter(char)

A character that belongs to no symbol, number, operator or parenthesis.

MissingOperand

An operator, a parenthesis or the end of the text where a symbol or number belongs.

MissingOperator(String)

A symbol, number or parenthesis that follows another without an operator.

UnbalancedParenthesis

A ( without its ), or a ) without its (.

NoSymbol

Numbers alone, with no symbol to chart.

UnknownSymbol(String)

A symbol the instrument catalog or the supplied history does not know.

TooComplex

More than 256 symbols, numbers, operators and parentheses.

Trait Implementations

impl Clone for ExpressionError

fn clone(&self) -> ExpressionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExpressionError

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

Formats the value using the given formatter.

impl Display for ExpressionError

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

Formats the value using the given formatter.

impl Error for ExpressionError

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 ExpressionError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ExpressionError