Enum Expression 

pub enum Expression {
    Boolean(bool),
    Function {
        name: String,
        args: Vec<String>,
    },
    Binary {
        left: Box<Expression>,
        op: BinaryOp,
        right: Box<Expression>,
    },
    Unary {
        op: UnaryOp,
        expr: Box<Expression>,
    },
    Group(Box<Expression>),
}

A security expression AST node.

Variants

Boolean(bool)

A boolean literal (true/false)

Function

A function call with name and arguments e.g., hasRole('ADMIN') -> Function(“hasRole”, vec![“ADMIN”])

Fields

name: String

args: Vec<String>

Binary

A binary operation combining two expressions e.g., hasRole('ADMIN') AND hasRole('USER')

Fields

left: Box<Expression>

op: BinaryOp

right: Box<Expression>

Unary

A unary operation on an expression e.g., NOT hasRole('ADMIN')

Fields

op: UnaryOp

expr: Box<Expression>

Group(Box<Expression>)

A grouped expression (parentheses) e.g., (hasRole('ADMIN') OR hasRole('USER'))

Implementations

impl Expression

pub fn function(name: impl Into<String>, args: Vec<String>) -> Expression

Creates a new function expression.

pub fn and(left: Expression, right: Expression) -> Expression

Creates a new AND expression.

pub fn or(left: Expression, right: Expression) -> Expression

Creates a new OR expression.

pub fn not(expr: Expression) -> Expression

Creates a new NOT expression.

pub fn group(expr: Expression) -> Expression

Creates a grouped expression.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 StructuralPartialEq for Expression