Enum ParseError 

pub enum ParseError {
    Empty,
    SignOnly,
    LeadingZero,
    OverlongFractional,
    ScientificNotation,
    InvalidChar,
    OutOfRange,
    MissingDigits,
}

Error returned by FromStr when the input is not a valid canonical decimal literal.

Each variant identifies one specific failure mode so callers can surface a precise diagnostic.

Variants

Empty

Input string is empty.

SignOnly

Input is - or + with no following digits.

LeadingZero

Integer part has a redundant leading zero (e.g. 01.5).

OverlongFractional

Fractional part has more significant digits than SCALE, so the value is not exactly representable (e.g. 1.05 at SCALE = 0). Trailing zeros carry no value and are accepted: 1.00 parses at SCALE = 0, being exactly 1.

ScientificNotation

Input uses scientific notation (1e3); not accepted.

InvalidChar

Input contains a character that is not a digit, sign, or dot.

OutOfRange

Parsed value exceeds the destination type’s range after scaling.

MissingDigits

Decimal point with no digit on one side (e.g. .5 or 5.).

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> ParseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ParseError

impl Debug for ParseError

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

Formats the value using the given formatter.

impl Display for ParseError

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

Formats the value using the given formatter.

impl Eq for ParseError

impl Error for ParseError

Available on crate feature std only.

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 Hash for ParseError

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ParseError

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