Enum DiffKind 

pub enum DiffKind {
    KeyFlippedToLiteralNull {
        source_range: Option<(usize, usize)>,
        followed_by: FollowedBy,
    },
    KeyFlippedToLiteralBool {
        value: bool,
        source_range: Option<(usize, usize)>,
        followed_by: FollowedBy,
    },
    KeyFieldFlippedToLiteralString {
        text: String,
        source_range: Option<(usize, usize)>,
        followed_by: FollowedBy,
    },
    KeyQuotedFlippedToLiteralString {
        text: String,
        source_range: Option<(usize, usize)>,
        followed_by: FollowedBy,
    },
    SubSelectionToLitObject {
        source_range: Option<(usize, usize)>,
    },
    LegacyObjectToLitObject {
        source_range: Option<(usize, usize)>,
    },
    Other {
        v03_variant: &'static str,
        v04_variant: &'static str,
        source_range: Option<(usize, usize)>,
    },
}

A single structural difference between two JSONSelection parses of the same source text under different ConnectSpec versions.

The breaking variants (KeyFlippedTo…) carry a followed_by field that records whether the v0.4 literal is followed by additional path access (e.g., null.foo, "x"->method, true { … }). When followed_by != FollowedBy::Nothing the v0.4 form is almost certainly a parsing accident — literals don’t have fields — and the user’s clear intent was the v0.3 field-reference reading. Such sites can be auto-fixed by prepending $. to the original token.

Variants

KeyFlippedToLiteralNull

A bare null token that v0.3 parsed as the field reference Key::Field("null") but v0.4 parses as LitExpr::Null.

Fields

source_range: Option<(usize, usize)>

followed_by: FollowedBy

KeyFlippedToLiteralBool

A bare true or false token that v0.3 parsed as the field reference Key::Field("true" | "false") but v0.4 parses as LitExpr::Bool(value).

Fields

value: bool

source_range: Option<(usize, usize)>

followed_by: FollowedBy

KeyFieldFlippedToLiteralString

A bare identifier-shaped token that v0.3 parsed as a field reference but v0.4 parses as a string literal. (This is rare; usually Key::Field → LitExpr::Bool/Null is the case.)

Fields

text: String

source_range: Option<(usize, usize)>

followed_by: FollowedBy

KeyQuotedFlippedToLiteralString

A quoted-string token that v0.3 parsed as the field reference Key::Quoted("...") but v0.4 parses as LitExpr::String("...").

Fields

text: String

source_range: Option<(usize, usize)>

followed_by: FollowedBy

SubSelectionToLitObject

v0.3 parsed Alias { ... } as a PathSelection whose only path element was a trailing SubSelection; v0.4 parses the same source as LitExpr::Object(SubSelection). Semantically equivalent — emitted so the survey can distinguish cosmetic unification noise from real breaking changes.

Fields

source_range: Option<(usize, usize)>

LegacyObjectToLitObject

v0.3 parsed an object literal as LegacyObject (key → value map); v0.4 parses it as LitExpr::Object(SubSelection). Cosmetic — same evaluation semantics under the unification.

Fields

source_range: Option<(usize, usize)>

Other

A divergence we don’t classify in detail. Carries the AST variant names from each parse for triage.

Fields

v03_variant: &'static str

v04_variant: &'static str

source_range: Option<(usize, usize)>

Trait Implementations

impl Clone for DiffKind

fn clone(&self) -> DiffKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiffKind

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

Formats the value using the given formatter.

impl Serialize for DiffKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.