Struct Predicate 

pub struct Predicate { /* private fields */ }

Parsed DSL predicate. Construct via Predicate::parse and evaluate via Predicate::satisfied_by.

Implementations

impl Predicate

pub fn parse(expr: &str) -> Result<Predicate, JsValue>

Parse a DSL expression into a Predicate.

Examples:

• min_count("role:director", 3)
• and(min_count("role:director", 3), min_distinct("region", 3))
• or(any("expertise"), all("emergency"))
• not(none("nationality:cn"))

pub fn satisfied_by(&self, signers_json: &str) -> Result<bool, JsValue>

Evaluate the predicate against a list of signers. Each signer is a plain JS object mapping attribute name -> array of values:

predicate.satisfiedBy([
  { "role:director": ["yes"], "region": ["europe"] },
  { "role:director": ["yes"], "region": ["americas"] },
]);

Trait Implementations

impl From<Predicate> for JsValue

fn from(value: Predicate) -> Self

Converts to this type from the input type.

impl FromWasmAbi for Predicate

type Abi = WasmPtr<WasmRefCell<Predicate>>

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: Self::Abi) -> Self

Recover a Self from Self::Abi.

impl IntoWasmAbi for Predicate

type Abi = WasmPtr<WasmRefCell<Predicate>>

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl LongRefFromWasmAbi for Predicate

type Abi = WasmPtr<WasmRefCell<Predicate>>

Same as RefFromWasmAbi::Abi

type Anchor = RcRef<Predicate>

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for Predicate

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl OptionIntoWasmAbi for Predicate

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl RefFromWasmAbi for Predicate

type Abi = WasmPtr<WasmRefCell<Predicate>>

The Wasm ABI type references to Self are recovered from.

type Anchor = RcRef<Predicate>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl RefMutFromWasmAbi for Predicate

type Abi = WasmPtr<WasmRefCell<Predicate>>

Same as RefFromWasmAbi::Abi

type Anchor = RcRefMut<Predicate>

Same as RefFromWasmAbi::Anchor

unsafe fn ref_mut_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl SupportsConstructor for Predicate

impl SupportsInstanceProperty for Predicate

impl SupportsStaticProperty for Predicate

impl TryFromJsValue for Predicate

fn try_from_js_value(value: JsValue) -> Result<Self, JsValue>

Performs the conversion.

fn try_from_js_value_ref(value: &JsValue) -> Option<Self>

Performs the conversion.

impl VectorFromWasmAbi for Predicate

type Abi = <Box<[JsValue]> as FromWasmAbi>::Abi

unsafe fn vector_from_abi(js: Self::Abi) -> Box<[Predicate]>

impl VectorIntoWasmAbi for Predicate

type Abi = <Box<[JsValue]> as IntoWasmAbi>::Abi

fn vector_into_abi(vector: Box<[Predicate]>) -> Self::Abi

impl WasmDescribe for Predicate

fn describe()

impl WasmDescribeVector for Predicate

fn describe_vector()