Enum Value 

pub enum Value {
    Scalar(String),
    Array(Vec<Value>),
    Object(IndexMap<String, Value>),
}

A node in the structprop value tree produced by parse().

The tree maps directly onto structprop’s three syntactic forms:

Structprop syntax	Variant
key = value	Value::Scalar
key = { a b c }	Value::Array
key { … }	Value::Object

Scalar strings are stored verbatim; numeric or boolean coercion is performed lazily via the Value::as_bool, Value::as_i64, and Value::as_f64 helpers.

Variants

Scalar(String)

A bare or quoted string token, stored as-is (no coercion applied).

Use Value::as_bool, Value::as_i64, or Value::as_f64 to attempt type coercion, or Value::is_null to test for null.

Array(Vec<Value>)

An ordered list of values, corresponding to key = { … } syntax.

Array items may themselves be Value::Scalars or Value::Objects (the latter written as { key = val … } inside the outer braces).

Object(IndexMap<String, Value>)

An ordered map from string keys to values, corresponding to either a key { … } block or the implicit top-level document object.

Key insertion order is preserved via IndexMap.

Implementations

impl Value

pub fn as_bool(&self) -> Option<bool>

Try to interpret this Value::Scalar as a bool.

Returns Some(true) for the literal string "true", Some(false) for "false", and None for any other value or non-scalar variant.

This mirrors the Python implementation’s json.loads coercion.

pub fn as_i64(&self) -> Option<i64>

Try to interpret this Value::Scalar as an i64.

Returns Some(n) if the string parses as a signed 64-bit integer, or None otherwise.

pub fn as_f64(&self) -> Option<f64>

Try to interpret this Value::Scalar as an f64.

Returns Some(n) if the string parses as a 64-bit float, or None otherwise.

pub fn is_null(&self) -> bool

Returns true if this value is the scalar string "null".

Used by the deserializer to map structprop’s null token to Option::None.

pub fn type_name(&self) -> &'static str

Returns a short human-readable name for the variant, used in error messages.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl PartialEq for Value

fn eq(&self, other: &Value) -> 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 Value