Enum MetaValue 

pub enum MetaValue {
    None,
    Bool(bool),
    Int(i64),
    Str(Arc<str>),
    List(Vec<MetaValue>),
    Tuple(Vec<MetaValue>),
    Map(BTreeMap<String, MetaValue>),
}

Structured metadata values (used by Textual handlers and richer annotations).

This is intentionally deterministic and Eq so it can be compared / merged and used in segment simplification.

Variants

None

Bool(bool)

Int(i64)

Str(Arc<str>)

List(Vec<MetaValue>)

Tuple(Vec<MetaValue>)

Map(BTreeMap<String, MetaValue>)

Implementations

impl MetaValue

pub fn str(value: impl Into<Arc<str>>) -> Self

pub fn parse_python_literal(input: &str) -> Option<Self>

Parse a small, deterministic subset of Python literals (like ast.literal_eval).

Supported:

• None, True, False
• integers (base-10)
• quoted strings '...' / "..." with basic escapes
• lists [a, b]
• tuples (a, b) (single element tuples require a trailing comma, like Python)
• dicts {'k': 1} (string keys only)

Trait Implementations

impl Clone for MetaValue

fn clone(&self) -> MetaValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetaValue

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

Formats the value using the given formatter.

impl Default for MetaValue

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for MetaValue

fn eq(&self, other: &MetaValue) -> 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 Eq for MetaValue

impl StructuralPartialEq for MetaValue