regorus 0.9.1

A fast, lightweight Rego (OPA policy language) interpreter
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172

#![allow(clippy::missing_const_for_fn)]
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

use alloc::boxed::Box;
use alloc::string::String;
use alloc::vec::Vec;
use serde::{Deserialize, Serialize};

use super::literals::{
    BooleanLiteral, DateTimeLiteral, NullLiteral, NumberLiteral, StringLiteral, TimeLiteral,
};
use super::operators::{ArrayOperator, ConditionOperator};
use super::references::AttributeReference;
use super::span::EmptySpan;

/// ABAC condition expression
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct ConditionExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub raw_expression: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub expression: Option<ConditionExpr>,
}

impl ConditionExpression {
    pub fn new(span: EmptySpan, expression: String) -> Self {
        Self {
            span,
            raw_expression: expression,
            expression: None,
        }
    }

    pub fn with_parsed(span: EmptySpan, raw_expression: String, parsed: ConditionExpr) -> Self {
        Self {
            span,
            raw_expression,
            expression: Some(parsed),
        }
    }
}

/// Condition expression node
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
#[serde(tag = "type")]
pub enum ConditionExpr {
    Logical(LogicalExpression),
    Unary(UnaryExpression),
    Binary(BinaryExpression),
    FunctionCall(FunctionCallExpression),
    AttributeReference(AttributeReference),
    ArrayExpression(ArrayExpression),
    Identifier(IdentifierExpression),
    VariableReference(VariableReference),
    PropertyAccess(PropertyAccessExpression),
    StringLiteral(StringLiteral),
    NumberLiteral(NumberLiteral),
    BooleanLiteral(BooleanLiteral),
    NullLiteral(NullLiteral),
    DateTimeLiteral(DateTimeLiteral),
    TimeLiteral(TimeLiteral),
    SetLiteral(SetLiteral),
    ListLiteral(ListLiteral),
}

/// Logical (AND/OR) expression
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct LogicalExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub operator: LogicalOperator,
    pub left: Box<ConditionExpr>,
    pub right: Box<ConditionExpr>,
}

/// Logical operator kinds
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum LogicalOperator {
    And,
    Or,
}

/// Unary expression (e.g., NOT)
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct UnaryExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub operator: UnaryOperator,
    pub operand: Box<ConditionExpr>,
}

/// Unary operator kinds
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum UnaryOperator {
    Not,
    Exists,
    NotExists,
}

/// Binary expression with an operator and two operands
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct BinaryExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub operator: ConditionOperator,
    pub left: Box<ConditionExpr>,
    pub right: Box<ConditionExpr>,
}

/// Function call expression (e.g. ToLower(expr))
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct FunctionCallExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub function: String,
    pub arguments: Vec<ConditionExpr>,
}

/// Array expression with quantifiers (e.g. ANY tag : ...)
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct ArrayExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub operator: ArrayOperator,
    pub array: Box<ConditionExpr>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub variable: Option<String>,
    pub condition: Box<ConditionExpr>,
}

/// Set literal value (e.g. {'a', 'b'})
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct SetLiteral {
    #[serde(skip)]
    pub span: EmptySpan,
    pub elements: Vec<ConditionExpr>,
}

/// List literal value (e.g. ['start', 'end'])
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct ListLiteral {
    #[serde(skip)]
    pub span: EmptySpan,
    pub elements: Vec<ConditionExpr>,
}

/// Identifier expression (unqualified name)
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct IdentifierExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub name: String,
}

/// Variable reference (e.g. loop variable in ANY clauses)
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct VariableReference {
    #[serde(skip)]
    pub span: EmptySpan,
    pub name: String,
}

/// Property access expression (e.g. tag.key)
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct PropertyAccessExpression {
    #[serde(skip)]
    pub span: EmptySpan,
    pub object: Box<ConditionExpr>,
    pub property: String,
}