Struct ValueVTable 

#[repr(C)]
pub struct ValueVTable {

    pub type_name: fn(&mut Formatter<'_>, TypeNameOpts) -> Result<(), Error>,
    pub marker_traits: MarkerTraits,
    pub drop_in_place: Option<for<'mem> unsafe fn(PtrMut<'mem>) -> PtrUninit<'mem>>,
    pub invariants: Option<for<'mem> unsafe fn(PtrConst<'mem>) -> bool>,
    pub display: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut Formatter<'_>) -> Result<(), Error>>,
    pub debug: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut Formatter<'_>) -> Result<(), Error>>,
    pub default_in_place: Option<for<'mem> unsafe fn(PtrUninit<'mem>) -> PtrMut<'mem>>,
    pub clone_into: Option<for<'src, 'dst> unsafe fn(PtrConst<'src>, PtrUninit<'dst>) -> PtrMut<'dst>>,
    pub partial_eq: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> bool>,
    pub partial_ord: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> Option<Ordering>>,
    pub ord: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> Ordering>,
    pub hash: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut dyn Hasher)>,
    pub parse: Option<for<'mem> unsafe fn(&str, PtrUninit<'mem>) -> Result<PtrMut<'mem>, ParseError>>,
    pub try_from: Option<for<'src, 'mem, 'shape> unsafe fn(PtrConst<'src>, &'static Shape, PtrUninit<'mem>) -> Result<PtrMut<'mem>, TryFromError>>,
    pub try_into_inner: Option<for<'src, 'dst> unsafe fn(PtrMut<'src>, PtrUninit<'dst>) -> Result<PtrMut<'dst>, TryIntoInnerError>>,
    pub try_borrow_inner: Option<for<'src> unsafe fn(PtrConst<'src>) -> Result<PtrConst<'src>, TryBorrowInnerError>>,
}

A vtable representing the operations that can be performed on a type, either for sized or unsized types.

This enum encapsulates the specific vtables allowing generic type-agnostic dynamic dispatch for core capabilities (clone, drop, compare, hash, etc).

Fields

type_name: fn(&mut Formatter<'_>, TypeNameOpts) -> Result<(), Error>

cf. TypeNameFn

marker_traits: MarkerTraits

Marker traits implemented by the type

drop_in_place: Option<for<'mem> unsafe fn(PtrMut<'mem>) -> PtrUninit<'mem>>

cf. DropInPlaceFn — if None, drops without side-effects

invariants: Option<for<'mem> unsafe fn(PtrConst<'mem>) -> bool>

cf. InvariantsFn

display: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut Formatter<'_>) -> Result<(), Error>>

cf. DisplayFn

debug: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut Formatter<'_>) -> Result<(), Error>>

cf. DebugFn

default_in_place: Option<for<'mem> unsafe fn(PtrUninit<'mem>) -> PtrMut<'mem>>

cf. DefaultInPlaceFn

clone_into: Option<for<'src, 'dst> unsafe fn(PtrConst<'src>, PtrUninit<'dst>) -> PtrMut<'dst>>

cf. CloneIntoFn

partial_eq: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> bool>

cf. PartialEqFn for equality comparison

partial_ord: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> Option<Ordering>>

cf. PartialOrdFn for partial ordering comparison

ord: Option<for<'l, 'r> unsafe fn(PtrConst<'l>, PtrConst<'r>) -> Ordering>

cf. CmpFn for total ordering

hash: Option<for<'mem> unsafe fn(PtrConst<'mem>, &mut dyn Hasher)>

cf. HashFn

parse: Option<for<'mem> unsafe fn(&str, PtrUninit<'mem>) -> Result<PtrMut<'mem>, ParseError>>

cf. ParseFn

try_from: Option<for<'src, 'mem, 'shape> unsafe fn(PtrConst<'src>, &'static Shape, PtrUninit<'mem>) -> Result<PtrMut<'mem>, TryFromError>>

cf. TryFromFn

This also acts as a “TryFromInner” — you can use it to go:

• String => Utf8PathBuf
• String => Uuid
• T => Option<T>
• T => Arc<T>
• T => NonZero<T>
• etc.

try_into_inner: Option<for<'src, 'dst> unsafe fn(PtrMut<'src>, PtrUninit<'dst>) -> Result<PtrMut<'dst>, TryIntoInnerError>>

cf. TryIntoInnerFn

This is used by transparent types to convert the wrapper type into its inner value. Primarily used during serialization.

try_borrow_inner: Option<for<'src> unsafe fn(PtrConst<'src>) -> Result<PtrConst<'src>, TryBorrowInnerError>>

cf. TryBorrowInnerFn

This is used by transparent types to efficiently access the inner value without copying.

Implementations

impl ValueVTable

pub const fn marker_traits(&self) -> MarkerTraits

Get the marker traits implemented for the type

pub const fn type_name( &self, ) -> fn(&mut Formatter<'_>, TypeNameOpts) -> Result<(), Error>

Get the type name fn of the type

pub const fn is_eq(&self) -> bool

Check if the type implements the Eq marker trait

pub const fn is_send(&self) -> bool

Check if the type implements the Send marker trait

pub const fn is_sync(&self) -> bool

Check if the type implements the Sync marker trait

pub const fn is_copy(&self) -> bool

Check if the type implements the Copy marker trait

pub const fn is_unpin(&self) -> bool

Check if the type implements the Unpin marker trait

pub const fn is_unwind_safe(&self) -> bool

Check if the type implements the UnwindSafe marker trait

pub const fn is_ref_unwind_safe(&self) -> bool

Check if the type implements the RefUnwindSafe marker trait

pub const fn has_display(&self) -> bool

Returns true if the type implements the Display trait and the display function is available in the vtable.

pub const fn has_debug(&self) -> bool

Returns true if the type implements the Debug trait and the debug function is available in the vtable.

pub const fn has_partial_eq(&self) -> bool

Returns true if the type implements the PartialEq trait and the partial_eq function is available in the vtable.

pub const fn has_partial_ord(&self) -> bool

Returns true if the type implements the PartialOrd trait and the partial_ord function is available in the vtable.

pub const fn has_ord(&self) -> bool

Returns true if the type implements the Ord trait and the ord function is available in the vtable.

pub const fn has_hash(&self) -> bool

Returns true if the type implements the Hash trait and the hash function is available in the vtable.

pub const fn has_default_in_place(&self) -> bool

Returns true if the type supports default-in-place construction via the vtable.

pub const fn has_clone_into(&self) -> bool

Returns true if the type supports in-place cloning via the vtable.

pub const fn has_parse(&self) -> bool

Returns true if the type supports parsing from a string via the vtable.

pub const fn builder<T>() -> ValueVTableBuilder<T>

where T: ?Sized,

Creates a new ValueVTableBuilder

Trait Implementations

impl Clone for ValueVTable

fn clone(&self) -> ValueVTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValueVTable

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

Formats the value using the given formatter.

impl Copy for ValueVTable