Struct cedar_policy_core::ast::Context

pub struct Context { /* private fields */ }

Context field of a Request

Implementations

impl Context

pub fn empty() -> Self

Create an empty Context

pub fn from_expr( expr: BorrowedRestrictedExpr<'_>, extensions: Extensions<'_> ) -> Result<Self, ContextCreationError>

Create a Context from a RestrictedExpr, which must be a Record.

extensions provides the Extensions which should be active for evaluating the RestrictedExpr.

pub fn from_pairs( pairs: impl IntoIterator<Item = (SmolStr, RestrictedExpr)>, extensions: Extensions<'_> ) -> Result<Self, ContextCreationError>

Create a Context from a map of key to RestrictedExpr, or a Vec of (key, RestrictedExpr) pairs, or any other iterator of (key, RestrictedExpr) pairs

extensions provides the Extensions which should be active for evaluating the RestrictedExpr.

pub fn from_json_str( json: &str ) -> Result<Self, ContextJsonDeserializationError>

Create a Context from a string containing JSON (which must be a JSON object, not any other JSON type, or you will get an error here). JSON here must use the __entity and __extn escapes for entity references, extension values, etc.

For schema-based parsing, use ContextJsonParser.

pub fn from_json_value( json: Value ) -> Result<Self, ContextJsonDeserializationError>

Create a Context from a serde_json::Value (which must be a JSON object, not any other JSON type, or you will get an error here). JSON here must use the __entity and __extn escapes for entity references, extension values, etc.

For schema-based parsing, use ContextJsonParser.

pub fn from_json_file( json: impl Read ) -> Result<Self, ContextJsonDeserializationError>

Create a Context from a JSON file. The JSON file must contain a JSON object, not any other JSON type, or you will get an error here. JSON here must use the __entity and __extn escapes for entity references, extension values, etc.

For schema-based parsing, use ContextJsonParser.

pub fn iter<'s>( &'s self ) -> Option<Box<dyn Iterator<Item = (&SmolStr, PartialValue)> + 's>>

Iterate over the (key, value) pairs in the Context; or return None if the Context is purely unknown

Trait Implementations

impl AsRef<PartialValue> for Context

fn as_ref(&self) -> &PartialValue

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Context

fn clone(&self) -> Context

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the “default value” for a type.

impl Display for Context

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

Formats the value using the given formatter.

impl From<Context> for PartialValue

fn from(ctx: Context) -> PartialValue

Converts to this type from the input type.

impl PartialEq for Context

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Context

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Context