Struct Unchanged

pub struct Unchanged;

A structural mutation that keeps its input without acquiring another owner.

This marker may be returned directly from a map or mutation callback. A pre-order map still descends into the original value’s children.

Trait Implementations

impl AnyCompatible for Unchanged

unsafe fn copy_to_any_view(_src: &Self, data: &mut TVMFFIAny)

the value to copy to TVMFFIAny

unsafe fn move_to_any(src: Self, data: &mut TVMFFIAny)

consume the value to move to Any

unsafe fn check_any_strict(data: &TVMFFIAny) -> bool

unsafe fn copy_from_any_view_after_check(_data: &TVMFFIAny) -> Self

Copy value from TVMFFIAny after checking caller must ensure that the value is compatible with the type

unsafe fn move_from_any_after_check(_data: &mut TVMFFIAny) -> Self

the value to move from TVMFFIAny NOTE: pay very careful attention to avoid memory leak!

unsafe fn try_cast_from_any_view(data: &TVMFFIAny) -> Result<Self, ()>

try to cast the value from AnyView

fn type_str() -> String

the type string of the type

fn type_schema() -> String

The type schema of the type: the JSON object C++ TypeTraits<T>::TypeSchema writes, which the type schemas of functions and fields embed.

unsafe fn is_undefined(field: *const Self) -> bool

Whether field, which holds a value of this type or all-zero bytes, holds all-zero bytes that are no value of this type, as a null object reference, a string of type index None or a zero device type: a field that a creator left undefined for reflection to set, as C++ UnsafeInit leaves a reference undefined (null). Unlike a C++ undefined reference, it is no value; a nullable reference is Option<T>, whose None is a defined value.

fn get_mismatch_type_info(data: &TVMFFIAny) -> String

Get the type key of a type when TryCastFromAnyView fails.

fn to_any(&self) -> Any

Borrow self into an owned Any, increfing object-backed values.

impl Clone for Unchanged

fn clone(&self) -> Unchanged

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Unchanged

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

Formats the value using the given formatter.

impl Default for Unchanged

fn default() -> Unchanged

Returns the “default value” for a type.

impl PartialEq for Unchanged

fn eq(&self, other: &Unchanged) -> 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 TryFrom<Any> for Unchanged

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Any) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> TryFrom<AnyView<'a>> for Unchanged

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: AnyView<'a>) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Unchanged

impl Eq for Unchanged

impl StructuralPartialEq for Unchanged