Struct Flattened 

pub struct Flattened<T> {
    pub value: T,
    pub raw: Value,
}

Wrapper that pairs a typed deserialization of T with the underlying Value tree captured from the source.

Flattened<T> is the answer to “I want #[serde(flatten)] plus the dynamic view for span lookup / unknown-field detection / schema validation”. It deserializes by:

1. First capturing the input as a Value (preserving every key the source supplied, including ones the typed T may not declare).
2. Then re-running T::deserialize against the captured Value via crate::from_value.

The cost is one extra Value tree allocation per Flattened<T> field and one extra deserialize pass — small compared to the typical config-loading hot path.

Examples

use noyalib::{from_str, Flattened, Value};
use serde::Deserialize;

#[derive(Debug, Deserialize)]
struct Inner {
    port: u16,
}

#[derive(Debug, Deserialize)]
struct Config {
    name: String,
    // Capture both the typed view and the raw mapping so the
    // application layer can still inspect unknown keys.
    inner: Flattened<Inner>,
}

let cfg: Config = from_str(
    "name: noyalib\ninner:\n  port: 8080\n  extra: not-in-Inner\n",
).unwrap();

// Typed view — the fields Inner declares.
assert_eq!(cfg.inner.value.port, 8080);

// Raw view — the full mapping including the `extra` key.
match &cfg.inner.raw {
    Value::Mapping(m) => {
        assert!(m.contains_key("port"));
        assert!(m.contains_key("extra"));
    }
    other => panic!("expected mapping, got {other:?}"),
}

Fields

value: T

The typed deserialization of the underlying value.

raw: Value

The raw Value tree captured from the source, before typed projection. Useful for span lookup, unknown-key inspection, schema validation, and round-trip serialization.

Implementations

impl<T> Flattened<T>

pub fn new(value: T, raw: Value) -> Self

Construct a Flattened from an explicit (raw, typed) pair.

This is mostly useful for tests and bespoke deserialization flows. Most callers obtain Flattened<T> via serde::Deserialize.

Examples

use noyalib::{Flattened, Value};
let f = Flattened::new(42_u16, Value::from(42_i64));
assert_eq!(f.value, 42);
assert_eq!(f.raw.as_i64(), Some(42));

pub fn into_value(self) -> T

Consume the wrapper and return only the typed view.

Examples

use noyalib::{Flattened, Value};
let f = Flattened::new("hello".to_string(), Value::from("hello"));
assert_eq!(f.into_value(), "hello");

pub fn as_value(&self) -> &T

Borrow the typed view.

pub fn as_raw(&self) -> &Value

Borrow the raw Value view.

Trait Implementations

impl<T: Clone> Clone for Flattened<T>

fn clone(&self) -> Flattened<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Flattened<T>

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

Formats the value using the given formatter.

impl<T> Deref for Flattened<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<'de, T> Deserialize<'de> for Flattened<T>

where T: for<'a> Deserialize<'a> + 'static,

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T: PartialEq> PartialEq for Flattened<T>

fn eq(&self, other: &Flattened<T>) -> 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<T> Serialize for Flattened<T>

where T: Serialize,

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: PartialEq> StructuralPartialEq for Flattened<T>