//! Embeddable object runtime and a small wordcode interpreter. No parser or
//! Python language type system; wordcode is not CPython bytecode compatible.
//!
//! ```
//! use aster_core::{Value, Vm};
//! let mut vm = Vm::new()?;
//! let object = vm.new_object()?; // One owned external reference.
//! vm.set_attr(object, "x", Value::Number(42_i64.into()))?;
//! assert_eq!(vm.get_attr(object, "x")?, Value::Number(42_i64.into()));
//! vm.retain(object)?; // Own an additional reference.
//! vm.release(object)?;
//! assert_eq!(vm.ref_count(object)?, 1);
//! vm.release(object)?; // The object is destroyed.
//! assert_eq!(vm.object_count(), 0);
//! # Ok::<(), aster_core::VmError>(())
//! ```
//!
//! Execute validated wordcode without a source parser:
//! ```
//! use aster_core::{CodeLayout, EndorCode, Instruction, Opcode, Value, Vm};
//! let mut vm = Vm::new()?;
//! let globals = vm.new_dict()?;
//! let code = EndorCode::from_instructions(
//!     &[
//!         Instruction::new(Opcode::LoadConst, 0),
//!         Instruction::simple(Opcode::ReturnValue),
//!     ],
//!     vec![Value::Text("Hello Endor".into())],
//!     CodeLayout::default(),
//! )?;
//! let code = vm.new_code(code)?;
//! let result = vm.execute(code, globals)?;
//! assert_eq!(result, Value::Text("Hello Endor".into()));
//! vm.release_value(result)?; // Object results own one external reference.
//! vm.release(code)?;
//! vm.release(globals)?;
//! assert_eq!(vm.object_count(), 0);
//! # Ok::<(), aster_core::VmError>(())
//! ```

mod builtins;
mod code;
mod eval;
mod frame;
mod heap;
mod instruction;
mod number;
mod object;
mod vm;
mod vm_builtins;

pub use builtins::{
    EndorBaseExceptionObject, EndorCellObject, EndorDictObject, EndorFunctionObject,
    EndorStringObject, EndorTracebackEntry,
};
pub use code::{CodeLayout, EndorCode, EndorCodeObject};
pub use frame::{EndorFrame, ExecutionLimits, ExecutionLocation};
pub use heap::ObjectRef;
pub use instruction::{DecodedInstruction, Instruction, Opcode};
pub use number::{
    EndorDecimal, EndorInteger, EndorNumber, EndorNumberObject, EndorRational, EndorReal,
};
pub use object::{
    CompareOp, EndorNativeCall, EndorNativeFunctionObject, EndorObject, NativeCall, NativeFunction,
    ObjectHeader, ObjectPayload, Record, Value,
};
pub use vm::{Vm, VmError};