Enum DecodePosition 

pub enum DecodePosition {
    Eval,
    Quote,
    Data,
    Pattern,
}

The syntactic position a decode is targeting, mirroring the kernel’s EncodePosition.

Position is the core idea of the codec contract: a decoder reads the same text differently depending on where its result will land. A codec may, for example, lower forms to calls in DecodePosition::Eval but keep them as data everywhere else (see CodecDefaultDecode::target_for).

Variants

Eval

Decoding into evaluable position: the result will be evaluated.

Quote

Decoding inside a quote: the result is literal structure, not evaluated.

Data

Decoding as plain data.

Pattern

Decoding into a pattern (match/binding) position.

Trait Implementations

impl Clone for DecodePosition

fn clone(&self) -> DecodePosition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DecodePosition

impl Debug for DecodePosition

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

Formats the value using the given formatter.

impl Eq for DecodePosition

impl From<EncodePosition> for DecodePosition

fn from(position: EncodePosition) -> Self

Converts to this type from the input type.

impl PartialEq for DecodePosition

fn eq(&self, other: &DecodePosition) -> 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 StructuralPartialEq for DecodePosition