Trait ConstDefault

pub trait ConstDefault {
    const DEFAULT: Self;
}

A trait for giving a type a useful default value in compile-time.

Required Associated Constants

const DEFAULT: Self

Returns the compile-time “default value” for a type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ConstDefault for &str

const DEFAULT: Self = ""

impl ConstDefault for &mut str

Available on crate feature unsafe_str only.

const DEFAULT: Self

impl ConstDefault for bool

const DEFAULT: Self = false

impl ConstDefault for char

const DEFAULT: Self = '\0'

impl ConstDefault for f32

const DEFAULT: Self = 0f32

impl ConstDefault for f64

const DEFAULT: Self = 0f64

impl ConstDefault for i8

const DEFAULT: Self = 0i8

impl ConstDefault for i16

const DEFAULT: Self = 0i16

impl ConstDefault for i32

const DEFAULT: Self = 0i32

impl ConstDefault for i64

const DEFAULT: Self = 0i64

impl ConstDefault for i128

const DEFAULT: Self = 0i128

impl ConstDefault for isize

const DEFAULT: Self = 0isize

impl ConstDefault for u8

const DEFAULT: Self = 0u8

impl ConstDefault for u16

const DEFAULT: Self = 0u16

impl ConstDefault for u32

const DEFAULT: Self = 0u32

impl ConstDefault for u64

const DEFAULT: Self = 0u64

impl ConstDefault for u128

const DEFAULT: Self = 0u128

impl ConstDefault for ()

const DEFAULT: Self = ()

impl ConstDefault for usize

const DEFAULT: Self = 0usize

impl<T> ConstDefault for &[T]

const DEFAULT: Self

impl<T> ConstDefault for *const T

const DEFAULT: Self

impl<T> ConstDefault for *mut T

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 0]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 1]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 2]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 3]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 4]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 5]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 6]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 7]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 8]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 9]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 10]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 11]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 12]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 13]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 14]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 15]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 16]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 17]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 18]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 19]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 20]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 21]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 22]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 23]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 24]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 25]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 26]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 27]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 28]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 29]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 30]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 31]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for [T; 32]

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T, T, T, T, T, T, T, T, T, T, T, T)

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for (T,)

const DEFAULT: Self

Implementors

impl ConstDefault for &CStr

const DEFAULT: Self

impl ConstDefault for Sign

const DEFAULT: Self = Sign::None

impl ConstDefault for AsciiChar

const DEFAULT: Self = AsciiChar::Null

impl ConstDefault for ExitCode

Available on crate feature std only.

const DEFAULT: Self = Self::SUCCESS

impl ConstDefault for Duration

const DEFAULT: Self

impl ConstDefault for char7

const DEFAULT: Self

impl ConstDefault for char8

const DEFAULT: Self

impl ConstDefault for char16

const DEFAULT: Self

impl ConstDefault for AtomicF32

const DEFAULT: Self

impl ConstDefault for AtomicF64

const DEFAULT: Self

impl ConstDefault for AtomicI8

const DEFAULT: Self

impl ConstDefault for AtomicI16

const DEFAULT: Self

impl ConstDefault for AtomicI32

const DEFAULT: Self

impl ConstDefault for AtomicI64

const DEFAULT: Self

impl ConstDefault for AtomicI128

const DEFAULT: Self

impl ConstDefault for AtomicIsize

const DEFAULT: Self

impl ConstDefault for AtomicU8

const DEFAULT: Self

impl ConstDefault for AtomicU16

const DEFAULT: Self

impl ConstDefault for AtomicU32

const DEFAULT: Self

impl ConstDefault for AtomicU64

const DEFAULT: Self

impl ConstDefault for AtomicU128

const DEFAULT: Self

impl ConstDefault for AtomicUsize

const DEFAULT: Self

impl ConstDefault for Condvar

Available on crate feature std only.

const DEFAULT: Self

impl ConstDefault for Once

Available on crate feature std only.

const DEFAULT: Self

impl ConstDefault for Boxed

Available on crate feature alloc only.

const DEFAULT: Self = Boxed

impl ConstDefault for HasherFnv<u32>

const DEFAULT: Self

impl ConstDefault for HasherFnv<u64>

const DEFAULT: Self

impl ConstDefault for HasherFnv<u128>

const DEFAULT: Self

impl ConstDefault for HasherFnv<usize>

const DEFAULT: Self

impl ConstDefault for HasherFx<u32>

const DEFAULT: Self

impl ConstDefault for HasherFx<u64>

const DEFAULT: Self

impl ConstDefault for HasherFx<usize>

const DEFAULT: Self

impl ConstDefault for HasherPengy

const DEFAULT: Self

impl ConstDefault for Lgc16

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for PhantomPinned

const DEFAULT: Self = Self

impl ConstDefault for RangeFull

const DEFAULT: Self = Self

impl ConstDefault for String

const DEFAULT: Self

impl ConstDefault for Xabc

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift8

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift16

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift32

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift64

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift128

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for XorShift128p

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for Xoroshiro128pp

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for Xyza8a

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for Xyza8b

Available on crate feature rand only.

const DEFAULT: Self

impl ConstDefault for devela::_info::examples::niche::NonExtremeI8

Available on doc only.

const DEFAULT: Self

impl ConstDefault for devela::all::NonExtremeI8

const DEFAULT: Self

impl ConstDefault for NonExtremeU8

const DEFAULT: Self

impl ConstDefault for NonExtremeU16

const DEFAULT: Self

impl<K, V> ConstDefault for BTreeMap<K, V>

const DEFAULT: Self

impl<N: ConstDefault, H: ConstDefault> ConstDefault for Mismatch<N, H>

const DEFAULT: Self

impl<S: ConstDefault, V: ConstDefault> ConstDefault for Own<S, V>

const DEFAULT: Self

impl<T> ConstDefault for Interval<T>

Provides a const default value for Interval, the unbounded interval $(-\infty, \infty)$.

See the Default implementation for more information.

See Default for more information.

const DEFAULT: Self

impl<T> ConstDefault for AtomicPtr<T>

const DEFAULT: Self

impl<T> ConstDefault for BTreeSet<T>

const DEFAULT: Self

impl<T> ConstDefault for ConstList<'_, T>

const DEFAULT: Self

impl<T> ConstDefault for LinkedList<T>

const DEFAULT: Self

impl<T> ConstDefault for PhantomData<T>

const DEFAULT: Self = Self

impl<T> ConstDefault for TypeResource<T>

where T: TypeResourced, T::TypeData: ConstDefault,

const DEFAULT: Self

impl<T> ConstDefault for Vec<T>

const DEFAULT: Self

impl<T> ConstDefault for VecDeque<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Option<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for LazyLock<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Cast<T>

Available on prim··· only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Reverse<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Weak<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Atomic<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Mutex<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for OnceLock<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RwLock<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Angle<T>

Available on crate feature geom only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for BareBox<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Cell<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for LazyCell<T>

Available on crate feature std only.

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for ManuallyDrop<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for OnceCell<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for AssertUnwindSafe<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Range<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RangeFrom<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RangeInclusive<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RangeTo<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RangeToInclusive<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RcWeak<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for RefCell<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Saturating<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for UnsafeCell<T>

const DEFAULT: Self

impl<T: ConstDefault> ConstDefault for Wrapping<T>

const DEFAULT: Self

impl<T: ConstDefault, const C: usize, const R: usize, const CR: usize, const RMAJ: bool> ConstDefault for Array2d<T, C, R, CR, RMAJ, Bare>

const DEFAULT: Self

impl<T: ConstDefault, const CAP: usize> ConstDefault for Array<T, CAP, Bare>

const DEFAULT: Self

impl<T: ConstDefault, const CAP: usize, IDX: ConstDefault> ConstDefault for Destaque<T, CAP, IDX, Bare>

const DEFAULT: Self

impl<T: ConstDefault, const CAP: usize, IDX: ConstDefault> ConstDefault for Stack<T, CAP, IDX, Bare>

const DEFAULT: Self

impl<T: ConstDefault, const D: usize> ConstDefault for Extent<T, D>

Available on crate feature geom only.

const DEFAULT: Self

impl<T: ConstDefault, const D: usize> ConstDefault for Point<T, D>

Available on crate feature geom only.

const DEFAULT: Self

impl<T: ConstDefault, const D: usize> ConstDefault for Vector<T, D>

Available on crate feature alg only.

const DEFAULT: Self

impl<T: MemPod, const CAP: usize> ConstDefault for DstArray<T, CAP>

Available on crate feature unsafe_layout only.

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for GraphemeNonul<CAP>

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for GraphemeU8<CAP>

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for StringNonul<CAP>

Available on crate feature _string_nonul only.

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for StringU8<CAP>

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for StringU16<CAP>

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for StringU32<CAP>

const DEFAULT: Self

impl<const CAP: usize> ConstDefault for StringUsize<CAP>

const DEFAULT: Self

impl<const SH1: usize, const SH2: usize, const SH3: usize> ConstDefault for XorShift8Custom<SH1, SH2, SH3>

Available on crate feature rand only.

const DEFAULT: Self