Struct enumflags2::FromBitsError

pub struct FromBitsError<T: RawBitFlags> { /* fields omitted */ }

The error struct used by BitFlags::from_bits and the TryFrom implementation` for invalid values.

#[derive(Clone, Copy, Debug, BitFlags)]
#[repr(u8)]
enum MyFlags {
    A = 0b0001,
    B = 0b0010,
    C = 0b0100,
    D = 0b1000,
}

let result: Result<BitFlags<MyFlags>, _> = 0b10101u8.try_into();
assert!(result.is_err());
let error = result.unwrap_err();
assert_eq!(error.truncate(), MyFlags::C | MyFlags::A);
assert_eq!(error.invalid_bits(), 0b10000);

Methods

impl<T: RawBitFlags> FromBitsError<T>

pub fn truncate(self) -> BitFlags<T>

Return the truncated result of the conversion.

pub fn invalid_bits(self) -> T::Type

Return the bits that didn't correspond to any flags.

Trait Implementations

impl<T: Clone + RawBitFlags> Clone for FromBitsError<T> where
    T::Type: Clone, 

fn clone(&self) -> FromBitsError<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Copy + RawBitFlags> Copy for FromBitsError<T> where
    T::Type: Copy, 

impl<T: Debug + RawBitFlags> Debug for FromBitsError<T> where
    T::Type: Debug, 

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

Formats the value using the given formatter.

impl<T: RawBitFlags + Debug> Display for FromBitsError<T>

fn fmt(&self, fmt: &mut Formatter) -> Result

Formats the value using the given formatter.