Enum ParseErrorReason 

#[repr(u8)]
pub enum ParseErrorReason {
    UnexpectedToken,
    InputIsEmpty,
    UnbalancedBrackets,
    TwoInnersWithoutOperator,
    TwoOperatorsWithoutInner,
    MustNotStartWith,
    UnitsNotEqual(UnitsNotEqual),
    NotConvertibleFromComplexF64(NotConvertibleFromComplexF64),
    CouldNotParse,
}

The varying reasons parsing a string to a DynQuantity can fail. This struct is part of ParseError, which contains the information where the parsing failed.

Variants

UnexpectedToken

String contained an unexpected token.

InputIsEmpty

Input string was empty.

UnbalancedBrackets

Brackets in the string are not balanced:

• “((5)”: Closing bracket is missing
• “(5))”: Opening bracket is missing

TwoInnersWithoutOperator

Two numbers without any combining operator are in the string:

• “5 32”: Invalid because it is unclear how the numbers should combined in the resulting DynQuantity.
• “5 * 32”: Valid

TwoOperatorsWithoutInner

Two operators without a number inbetween are in the string:

• “3 / * 2”: Invalid
• “3 / 1 * 2”: Valid

MustNotStartWith

The string must not start with certain characters, for example:

• Operators such as *, /, ^
• Closing brackets

UnitsNotEqual(UnitsNotEqual)

An addition / subtraction of two invalid quantities was defined in the string, e.g. “3 A + 2 V”.

NotConvertibleFromComplexF64(NotConvertibleFromComplexF64)

See docstring of NotConvertibleFromComplexF64.

CouldNotParse

Generic fallback error for all other parsing failures

Trait Implementations

impl Clone for ParseErrorReason

fn clone(&self) -> ParseErrorReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseErrorReason

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

Formats the value using the given formatter.

impl Default for ParseErrorReason

fn default() -> ParseErrorReason

Returns the “default value” for a type.

impl Display for ParseErrorReason

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

Formats the value using the given formatter.

impl Error for ParseErrorReason

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<UnitsNotEqual> for ParseErrorReason

fn from(value: UnitsNotEqual) -> ParseErrorReason

Converts to this type from the input type.

impl PartialEq for ParseErrorReason

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