Struct FieldsWalker 

pub struct FieldsWalker<'r, R: BorrowedReader + 'r> { /* private fields */ }

Walker for a revisioned enum. Generated by #[revisioned(...)].

Implementations

impl<'r, R: BorrowedReader + 'r> FieldsWalker<'r, R>

pub fn revision(&self) -> u16

Wire revision of the encoded value being walked.

pub fn discriminant(&self) -> u32

Variant discriminant on the wire (for Wire) or on the re-encoded current-rev bytes (for the borrowed / owned arms). Use walk_revisioned_variant_name to map this to a variant identifier.

pub fn is_value(&self) -> bool

Returns true if the wire’s discriminant identifies this variant at the wire revision (or, for borrowed / owned walkers, on the current-rev bytes).

pub fn into_value( self, ) -> Result<<Box<Selector> as WalkRevisioned>::Walker<'r, R>, Error>

Walk into the payload of the #variant_ident variant.

Errors with revision::Error::Deserialize if the wire encoding does not identify this variant. Errors with revision::Error::Conversion in materialised mode (older-rev convert_fn types); callers should use decode_<variant> in that case.

pub fn decode_value(self) -> Result<Box<Selector>, Error>

Decode and return the inner value of the #variant_ident variant directly. Unlike into_<variant>, this works on every repr (Wire, OptimisedBorrowed, ConvertedOwned) because it deserialises by value rather than handing back a sub-walker.

pub fn value_view(self) -> Result<VariantView<'r, Box<Selector>>, Error>

Return the variant payload as a VariantView.

Works on every repr. OptimisedBorrowed (the common optimised-enum case) hands back a borrowed slice with the source’s 'r lifetime — no allocation. Wire walkers re-encode (one allocation); ConvertedOwned (cross-revision convert_fn) walkers move the owned bytes.

Use decode_<variant> when you want the inner type by value directly.

pub fn is_select(&self) -> bool

Returns true if the wire’s discriminant identifies this variant at the wire revision (or, for borrowed / owned walkers, on the current-rev bytes).

pub fn into_select( self, ) -> Result<<Vec<Field> as WalkRevisioned>::Walker<'r, R>, Error>

Walk into the payload of the #variant_ident variant.

Errors with revision::Error::Deserialize if the wire encoding does not identify this variant. Errors with revision::Error::Conversion in materialised mode (older-rev convert_fn types); callers should use decode_<variant> in that case.

pub fn decode_select(self) -> Result<Vec<Field>, Error>

Decode and return the inner value of the #variant_ident variant directly. Unlike into_<variant>, this works on every repr (Wire, OptimisedBorrowed, ConvertedOwned) because it deserialises by value rather than handing back a sub-walker.

pub fn select_view(self) -> Result<VariantView<'r, Vec<Field>>, Error>

Return the variant payload as a VariantView.

Works on every repr. OptimisedBorrowed (the common optimised-enum case) hands back a borrowed slice with the source’s 'r lifetime — no allocation. Wire walkers re-encode (one allocation); ConvertedOwned (cross-revision convert_fn) walkers move the owned bytes.

Use decode_<variant> when you want the inner type by value directly.