Enum SystemStreamItem

pub enum SystemStreamItem {
    VersionMarker(u8, u8),
    SymbolTableValue(IonType),
    SymbolTableNull(IonType),
    Value(IonType),
    Null(IonType),
    Nothing,
}

Raw stream elements that a SystemReader may encounter.

Variants

VersionMarker(u8, u8)

An Ion Version Marker (IVM) indicating the Ion major and minor version that were used to encode the values that follow.

SymbolTableValue(IonType)

A non-null Ion value that is part of an encoded local symbol table. This includes:

• Top-level structs annotated with $ion_symbol_table::
• Any fields nested inside such structs, but especially imports and symbols

SymbolTableNull(IonType)

A null Ion value that is part of an encoded local symbol table.

Value(IonType)

A non-null Ion value and its corresponding Ion data type.

Null(IonType)

A null Ion value and its corresponding Ion data type.

Nothing

Indicates that the reader is not positioned over anything. This can happen:

• before the reader has begun processing the stream.
• after the reader has stepped into a container, but before the reader has called next()
• after the reader has stepped out of a container, but before the reader has called next()
• after the reader has read the last item in a container

Trait Implementations

impl Clone for SystemStreamItem

fn clone(&self) -> SystemStreamItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SystemStreamItem

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

Formats the value using the given formatter.

impl PartialEq for SystemStreamItem

fn eq(&self, other: &SystemStreamItem) -> bool

Tests for self and other values to be equal, and is used by ==.

const 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 Copy for SystemStreamItem

impl Eq for SystemStreamItem

impl StructuralPartialEq for SystemStreamItem