Struct Descriptor 

pub struct Descriptor {
    pub lang: String,
    pub body: String,
    pub inputs: Vec<String>,
    pub signature: Signature,
}

A function descriptor (7) in its spec-0.3.0 form: signature, code and declared inputs.

It has no place for the members spec-0.4.0 adds, signature.order and argument extent, so from_json and from_value refuse a descriptor that has them with E_SCHEMA, as in 0.3.3, rather than return a value whose canonical bytes and hash would drop them. Read any descriptor with FunctionDescriptor, which has both; FunctionDescriptor::to_descriptor gives this form when neither is present.

Fields

lang: String

code.lang, e.g. stored.

body: String

code.body, opaque to this crate.

inputs: Vec<String>

Fully qualified names of the functions this one may read, ascending.

signature: Signature

The signature.

Implementations

impl Descriptor

pub fn from_json(bytes: &[u8]) -> Result<Descriptor>

Parses a descriptor from JSON text: strict JSON, structure, canonical form (7). A descriptor with signature.order or an argument extent is E_SCHEMA here (see Descriptor); use FunctionDescriptor::from_json.

pub fn from_value(v: &Value) -> Result<Descriptor>

Checks a parsed JSON value as a descriptor; E_SCHEMA for order or extent, as from_json.

pub fn to_value(&self) -> Value

The JSON form.

pub fn canonical(&self) -> Vec<u8>

The canonical bytes (6.2).

pub fn hash(&self) -> String

The function hash: SHA-256 of the canonical bytes, lowercase hex.

Trait Implementations

impl Clone for Descriptor

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Descriptor

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

Formats the value using the given formatter.

impl Eq for Descriptor

impl From<Descriptor> for FunctionDescriptor

fn from(d: Descriptor) -> FunctionDescriptor

Converts to this type from the input type.

impl Hash for Descriptor

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Descriptor

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Descriptor