Files
regorus/src/languages/rego/compiler/error.rs
Anand Krishnamoorthi a3a20a1235 feat!: Rego -> RVM Compiler and extensive testsuite (#506)
# RVM compiler test cases

Coverage:
- arithmetic
- arrays
- chained lookups
- comparisons
- comprehensions
- default rules
- destructuring
- function rules
- loops/quantifiers
- multiple entrypoints
- objects/sets
- variables
- negative/edge scenarios such as data/rule conflicts
- virtual data lookups
- etc

 # Modify interpreter and compiled policy for RVM Compilation

- Interpreter::eval_default_rule_for_compiler:
   evaluates a named default rule in isolation - allows compiler to emit a constant value instead of instructions
   for the default value

#  feat: Rego Compiler Scaffolding

- Introduce the rego::compiler module surface and entry point wiring
- Add the core compiler concepts:
  - register allocator
  - scope tracking
  - literal/builtin tables
  - rule worklists
  - instruction emit helpers
  - compiler-specific error types
  - context structs for rules, comprehensions, and loops to support later lowering passes.

# feat: Compile Rules/Queries

- add compiler::compile_from_policy workflow plus rule worklist, entry-point wiring, and recursion checks
- implement query lowering:
  - scheduling-aware statement ordering
  - loop hoisting
  - “every/some” semantics
  - context yields
  -  literal assertions
- finalize Program construction

# feat: Expression Lowering

- add compile_rego_expr and helpers to translate every AST expression into RVM instructions,
- interop with binding plans, comprehensions, and membership checks.
- implement collection literal builders (ArrayCreate, SetCreate, ObjectCreate)
  - dedupe literal keys and handle mixed literal/dynamic fields via instruction data blocks.
- operations:
  - arithmetic/boolean/bin operators
  - membership
  - unary minus
  - set unions/intersections
  - etc
- user-defined and builtin function calls
- reference handling
  - analyse chained refs
  - distinguishe data/input/local roots
  - perform rule dispatch or virtual document lookups
  - emits optimized Index/ChainedIndex instructions.

# feat: Comprehensions & Loops

- shared comprehension emitter
 - wraps array/set/object comprehensions with ComprehensionBegin/End
 - context management
- loop lowering utilities
 - read hoisting metadata
 - emit LoopStart/LoopNext
 - some in lowering
 - every quantifiers
 - index iteration
 - propagate binding plans into stored registers so downstream statements see bound variables.

# feat: Destructuring Lowering

- destructuring planner integration
 - assignment/parameter/loop bindings use hoisted plans instead of re-walking ASTs.
- handle :=, =, wildcard matches, and equality
 - evaluate RHS
 - applying destructuring plans
 - emit assert condition as needed
- support nested array/object destructuring, dynamic keys, and some ... in forms

# test: Shared Testing + RVM Suites

- move YAML test helpers into test_utils.rs and re-export via common.rs for use by interpreter and vm test suites
- comprehensive compiler test suite
  - compiles policies with the new Rego→RVM compiler
  - runs them through RegoVM
  - compares against interpreter behavior
  - supports multiple entry points
  - provides assembly listings
  - filterable YAML suites.

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
2025-11-24 12:08:37 -06:00

72 lines
2.0 KiB
Rust

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
use alloc::format;
use alloc::string::String;
#[derive(thiserror::Error, Debug)]
pub enum CompilerError {
#[error("Not a builtin function: {name}")]
NotBuiltinFunction { name: String },
#[error("Unknown builtin function: {name}")]
UnknownBuiltinFunction { name: String },
#[error("internal: missing context for yield")]
MissingYieldContext,
#[error(
"Direct access to 'data' root is not allowed. Use a specific path like 'data.package.rule'"
)]
DirectDataAccess,
#[error("Not a simple reference chain")]
NotSimpleReferenceChain,
#[error("Missing binding plan for {context}")]
MissingBindingPlan { context: String },
#[error("Unexpected binding plan variant for {context}: {found}")]
UnexpectedBindingPlan { context: String, found: String },
#[error("Invalid destructuring pattern in assignment")]
InvalidDestructuringPattern,
#[error("Unsupported expression type in chained reference")]
UnsupportedChainedExpression,
#[error("internal: no rule type found for '{rule_path}'")]
RuleTypeNotFound { rule_path: String },
#[error("unary - can only be used with numeric literals")]
InvalidUnaryMinus,
#[error("Unknown function: '{name}'")]
UnknownFunction { name: String },
#[error("Undefined variable: '{name}'")]
UndefinedVariable { name: String },
#[error("SomeIn should have been hoisted as a loop")]
SomeInNotHoisted,
#[error("Invalid function expression")]
InvalidFunctionExpression,
#[error("Invalid function expression with package")]
InvalidFunctionExpressionWithPackage,
#[error("Compilation error: {message}")]
General { message: String },
}
impl From<anyhow::Error> for CompilerError {
fn from(err: anyhow::Error) -> Self {
CompilerError::General {
message: format!("{}", err),
}
}
}
pub type Result<T> = ::core::result::Result<T, CompilerError>;