Enum VarSegment 

#[non_exhaustive]
pub enum VarSegment {
    Field(String),
    Index(i64),
    Key(String),
    Dynamic(String),
    Slice(Option<i64>, Option<i64>),
}

A segment in a variable path.

The first segment of a path is the root name, carried as Field. Every later segment is a bracket subscript. A Field in a non-root position represents a dotted .field access, which — kaish being brackets-only — resolves to a loud error with the bracket form in the message.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Field(String)

The root variable name, or (illegally, past the root) a dotted .field.

Index(i64)

Integer subscript [0] / [-1] — indexes a list (negative from the end).

Key(String)

Literal key [bareword] or ["quoted key"] — keys a record.

Dynamic(String)

Dynamic subscript [$var] — the named variable’s value is the key (record) or index (list) at resolution time. Holds the variable name.

Slice(Option<i64>, Option<i64>)

Slice [a:b] — end-exclusive, yields a list. Either bound may be omitted.

Trait Implementations

impl Clone for VarSegment

fn clone(&self) -> VarSegment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VarSegment

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

Formats the value using the given formatter.

impl PartialEq for VarSegment

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for VarSegment