Struct Expression

pub struct Expression(/* private fields */);

Expressions to be evaluated

Implementations

impl Expression

pub fn new_string(value: String) -> Self

Create an expression representing a literal string.

pub fn new_bool(value: bool) -> Self

Create an expression representing a literal bool.

pub fn new_long(value: Integer) -> Self

Create an expression representing a literal long.

pub fn new_record( fields: impl IntoIterator<Item = (String, Self)>, ) -> Result<Self, ExpressionConstructionError>

Create an expression representing a record.

Error if any key appears two or more times in fields.

pub fn new_set(values: impl IntoIterator<Item = Self>) -> Self

Create an expression representing a Set.

pub fn new_ip(src: impl AsRef<str>) -> Self

Create an expression representing an ip address. This function does not perform error checking on the source string, it creates an expression that calls the ip constructor.

pub fn new_decimal(src: impl AsRef<str>) -> Self

Create an expression representing a fixed precision decimal number. This function does not perform error checking on the source string, it creates an expression that calls the decimal constructor.

pub fn new_datetime(src: impl AsRef<str>) -> Self

Create an expression representing a particular instant of time. This function does not perform error checking on the source string, it creates an expression that calls the datetime constructor.

pub fn new_duration(src: impl AsRef<str>) -> Self

Create an expression representing a duration of time. This function does not perform error checking on the source string, it creates an expression that calls the datetime constructor.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl From<&Expr> for Expression

Available on crate feature protobufs only.

fn from(v: &Expr) -> Expression

Converts to this type from the input type.

impl From<&Expression> for Expr

Available on crate feature protobufs only.

fn from(v: &Expression) -> Expr

Converts to this type from the input type.

impl FromStr for Expression

fn from_str(expression: &str) -> Result<Self, Self::Err>

create an Expression using Cedar syntax

type Err = ParseErrors

The associated error which can be returned from parsing.

impl Protobuf for Expression

Available on crate feature protobufs only.

fn encode(&self) -> Vec<u8>

Encode into protobuf format. Returns a freshly-allocated buffer containing binary data.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

Decode the binary data in buf, producing something of type Self

impl RefCast for Expression

type From = Expr

fn ref_cast(_from: &Self::From) -> &Self

fn ref_cast_mut(_from: &mut Self::From) -> &mut Self