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Copy pathbytecode.rs
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2033 lines (1867 loc) · 59.5 KB
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//! Implement python as a virtual machine with bytecode. This module
//! implements bytecode structure.
use crate::{
marshal::MarshalError,
{OneIndexed, SourceLocation},
};
use bitflags::bitflags;
use itertools::Itertools;
use malachite_bigint::BigInt;
use num_complex::Complex64;
use rustpython_wtf8::{Wtf8, Wtf8Buf};
use std::{collections::BTreeSet, fmt, hash, marker::PhantomData, mem, num::NonZeroU8, ops::Deref};
/// Oparg values for [`Instruction::ConvertValue`].
///
/// ## See also
///
/// - [CPython FVC_* flags](https://github.com/python/cpython/blob/8183fa5e3f78ca6ab862de7fb8b14f3d929421e0/Include/ceval.h#L129-L132)
#[repr(u8)]
#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
pub enum ConvertValueOparg {
/// No conversion.
///
/// ```python
/// f"{x}"
/// f"{x:4}"
/// ```
None = 0,
/// Converts by calling `str(<value>)`.
///
/// ```python
/// f"{x!s}"
/// f"{x!s:2}"
/// ```
Str = 1,
/// Converts by calling `repr(<value>)`.
///
/// ```python
/// f"{x!r}"
/// f"{x!r:2}"
/// ```
Repr = 2,
/// Converts by calling `ascii(<value>)`.
///
/// ```python
/// f"{x!a}"
/// f"{x!a:2}"
/// ```
Ascii = 3,
}
impl fmt::Display for ConvertValueOparg {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let out = match self {
Self::Str => "1 (str)",
Self::Repr => "2 (repr)",
Self::Ascii => "3 (ascii)",
// We should never reach this. `FVC_NONE` are being handled by `Instruction::FormatSimple`
Self::None => "",
};
write!(f, "{out}")
}
}
impl OpArgType for ConvertValueOparg {
#[inline]
fn from_op_arg(x: u32) -> Option<Self> {
Some(match x {
// Ruff `ConversionFlag::None` is `-1i8`,
// when its converted to `u8` its value is `u8::MAX`
0 | 255 => Self::None,
1 => Self::Str,
2 => Self::Repr,
3 => Self::Ascii,
_ => return None,
})
}
#[inline]
fn to_op_arg(self) -> u32 {
self as u32
}
}
/// Resume type for the RESUME instruction
#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
#[repr(u32)]
pub enum ResumeType {
AtFuncStart = 0,
AfterYield = 1,
AfterYieldFrom = 2,
AfterAwait = 3,
}
/// CPython 3.11+ linetable location info codes
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(u8)]
pub enum PyCodeLocationInfoKind {
// Short forms are 0 to 9
Short0 = 0,
Short1 = 1,
Short2 = 2,
Short3 = 3,
Short4 = 4,
Short5 = 5,
Short6 = 6,
Short7 = 7,
Short8 = 8,
Short9 = 9,
// One line forms are 10 to 12
OneLine0 = 10,
OneLine1 = 11,
OneLine2 = 12,
NoColumns = 13,
Long = 14,
None = 15,
}
impl PyCodeLocationInfoKind {
pub fn from_code(code: u8) -> Option<Self> {
match code {
0 => Some(Self::Short0),
1 => Some(Self::Short1),
2 => Some(Self::Short2),
3 => Some(Self::Short3),
4 => Some(Self::Short4),
5 => Some(Self::Short5),
6 => Some(Self::Short6),
7 => Some(Self::Short7),
8 => Some(Self::Short8),
9 => Some(Self::Short9),
10 => Some(Self::OneLine0),
11 => Some(Self::OneLine1),
12 => Some(Self::OneLine2),
13 => Some(Self::NoColumns),
14 => Some(Self::Long),
15 => Some(Self::None),
_ => Option::None,
}
}
pub fn is_short(&self) -> bool {
(*self as u8) <= 9
}
pub fn short_column_group(&self) -> Option<u8> {
if self.is_short() {
Some(*self as u8)
} else {
Option::None
}
}
pub fn one_line_delta(&self) -> Option<i32> {
match self {
Self::OneLine0 => Some(0),
Self::OneLine1 => Some(1),
Self::OneLine2 => Some(2),
_ => Option::None,
}
}
}
pub trait Constant: Sized {
type Name: AsRef<str>;
/// Transforms the given Constant to a BorrowedConstant
fn borrow_constant(&self) -> BorrowedConstant<'_, Self>;
}
impl Constant for ConstantData {
type Name = String;
fn borrow_constant(&self) -> BorrowedConstant<'_, Self> {
use BorrowedConstant::*;
match self {
Self::Integer { value } => Integer { value },
Self::Float { value } => Float { value: *value },
Self::Complex { value } => Complex { value: *value },
Self::Boolean { value } => Boolean { value: *value },
Self::Str { value } => Str { value },
Self::Bytes { value } => Bytes { value },
Self::Code { code } => Code { code },
Self::Tuple { elements } => Tuple { elements },
Self::None => None,
Self::Ellipsis => Ellipsis,
}
}
}
/// A Constant Bag
pub trait ConstantBag: Sized + Copy {
type Constant: Constant;
fn make_constant<C: Constant>(&self, constant: BorrowedConstant<'_, C>) -> Self::Constant;
fn make_int(&self, value: BigInt) -> Self::Constant;
fn make_tuple(&self, elements: impl Iterator<Item = Self::Constant>) -> Self::Constant;
fn make_code(&self, code: CodeObject<Self::Constant>) -> Self::Constant;
fn make_name(&self, name: &str) -> <Self::Constant as Constant>::Name;
}
pub trait AsBag {
type Bag: ConstantBag;
#[allow(clippy::wrong_self_convention)]
fn as_bag(self) -> Self::Bag;
}
impl<Bag: ConstantBag> AsBag for Bag {
type Bag = Self;
fn as_bag(self) -> Self {
self
}
}
#[derive(Clone, Copy)]
pub struct BasicBag;
impl ConstantBag for BasicBag {
type Constant = ConstantData;
fn make_constant<C: Constant>(&self, constant: BorrowedConstant<'_, C>) -> Self::Constant {
constant.to_owned()
}
fn make_int(&self, value: BigInt) -> Self::Constant {
ConstantData::Integer { value }
}
fn make_tuple(&self, elements: impl Iterator<Item = Self::Constant>) -> Self::Constant {
ConstantData::Tuple {
elements: elements.collect(),
}
}
fn make_code(&self, code: CodeObject<Self::Constant>) -> Self::Constant {
ConstantData::Code {
code: Box::new(code),
}
}
fn make_name(&self, name: &str) -> <Self::Constant as Constant>::Name {
name.to_owned()
}
}
/// Primary container of a single code object. Each python function has
/// a code object. Also a module has a code object.
#[derive(Clone)]
pub struct CodeObject<C: Constant = ConstantData> {
pub instructions: CodeUnits,
pub locations: Box<[SourceLocation]>,
pub flags: CodeFlags,
/// Number of positional-only arguments
pub posonlyarg_count: u32,
pub arg_count: u32,
pub kwonlyarg_count: u32,
pub source_path: C::Name,
pub first_line_number: Option<OneIndexed>,
pub max_stackdepth: u32,
/// Name of the object that created this code object
pub obj_name: C::Name,
/// Qualified name of the object (like CPython's co_qualname)
pub qualname: C::Name,
pub cell2arg: Option<Box<[i32]>>,
pub constants: Box<[C]>,
pub names: Box<[C::Name]>,
pub varnames: Box<[C::Name]>,
pub cellvars: Box<[C::Name]>,
pub freevars: Box<[C::Name]>,
/// Line number table (CPython 3.11+ format)
pub linetable: Box<[u8]>,
/// Exception handling table
pub exceptiontable: Box<[u8]>,
}
bitflags! {
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct CodeFlags: u16 {
const NEW_LOCALS = 0x01;
const IS_GENERATOR = 0x02;
const IS_COROUTINE = 0x04;
const HAS_VARARGS = 0x08;
const HAS_VARKEYWORDS = 0x10;
const IS_OPTIMIZED = 0x20;
}
}
impl CodeFlags {
pub const NAME_MAPPING: &'static [(&'static str, Self)] = &[
("GENERATOR", Self::IS_GENERATOR),
("COROUTINE", Self::IS_COROUTINE),
(
"ASYNC_GENERATOR",
Self::from_bits_truncate(Self::IS_GENERATOR.bits() | Self::IS_COROUTINE.bits()),
),
("VARARGS", Self::HAS_VARARGS),
("VARKEYWORDS", Self::HAS_VARKEYWORDS),
];
}
/// an opcode argument that may be extended by a prior ExtendedArg
#[derive(Copy, Clone, PartialEq, Eq)]
#[repr(transparent)]
pub struct OpArgByte(pub u8);
impl OpArgByte {
pub const fn null() -> Self {
Self(0)
}
}
impl From<u8> for OpArgByte {
fn from(raw: u8) -> Self {
Self(raw)
}
}
impl fmt::Debug for OpArgByte {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.fmt(f)
}
}
/// a full 32-bit op_arg, including any possible ExtendedArg extension
#[derive(Copy, Clone, Debug)]
#[repr(transparent)]
pub struct OpArg(pub u32);
impl OpArg {
pub const fn null() -> Self {
Self(0)
}
/// Returns how many CodeUnits a instruction with this op_arg will be encoded as
#[inline]
pub const fn instr_size(self) -> usize {
(self.0 > 0xff) as usize + (self.0 > 0xff_ff) as usize + (self.0 > 0xff_ff_ff) as usize + 1
}
/// returns the arg split into any necessary ExtendedArg components (in big-endian order) and
/// the arg for the real opcode itself
#[inline(always)]
pub fn split(self) -> (impl ExactSizeIterator<Item = OpArgByte>, OpArgByte) {
let mut it = self
.0
.to_le_bytes()
.map(OpArgByte)
.into_iter()
.take(self.instr_size());
let lo = it.next().unwrap();
(it.rev(), lo)
}
}
impl From<u32> for OpArg {
fn from(raw: u32) -> Self {
Self(raw)
}
}
#[derive(Default, Copy, Clone)]
#[repr(transparent)]
pub struct OpArgState {
state: u32,
}
impl OpArgState {
#[inline(always)]
pub fn get(&mut self, ins: CodeUnit) -> (Instruction, OpArg) {
let arg = self.extend(ins.arg);
if ins.op != Instruction::ExtendedArg {
self.reset();
}
(ins.op, arg)
}
#[inline(always)]
pub fn extend(&mut self, arg: OpArgByte) -> OpArg {
self.state = (self.state << 8) | u32::from(arg.0);
OpArg(self.state)
}
#[inline(always)]
pub const fn reset(&mut self) {
self.state = 0
}
}
pub trait OpArgType: Copy {
fn from_op_arg(x: u32) -> Option<Self>;
fn to_op_arg(self) -> u32;
}
impl OpArgType for u32 {
#[inline(always)]
fn from_op_arg(x: u32) -> Option<Self> {
Some(x)
}
#[inline(always)]
fn to_op_arg(self) -> u32 {
self
}
}
impl OpArgType for bool {
#[inline(always)]
fn from_op_arg(x: u32) -> Option<Self> {
Some(x != 0)
}
#[inline(always)]
fn to_op_arg(self) -> u32 {
self as u32
}
}
macro_rules! op_arg_enum_impl {
(enum $name:ident { $($(#[$var_attr:meta])* $var:ident = $value:literal,)* }) => {
impl OpArgType for $name {
fn to_op_arg(self) -> u32 {
self as u32
}
fn from_op_arg(x: u32) -> Option<Self> {
Some(match u8::try_from(x).ok()? {
$($value => Self::$var,)*
_ => return None,
})
}
}
};
}
macro_rules! op_arg_enum {
($(#[$attr:meta])* $vis:vis enum $name:ident { $($(#[$var_attr:meta])* $var:ident = $value:literal,)* }) => {
$(#[$attr])*
$vis enum $name {
$($(#[$var_attr])* $var = $value,)*
}
op_arg_enum_impl!(enum $name {
$($(#[$var_attr])* $var = $value,)*
});
};
}
#[derive(Copy, Clone)]
pub struct Arg<T: OpArgType>(PhantomData<T>);
impl<T: OpArgType> Arg<T> {
#[inline]
pub const fn marker() -> Self {
Self(PhantomData)
}
#[inline]
pub fn new(arg: T) -> (Self, OpArg) {
(Self(PhantomData), OpArg(arg.to_op_arg()))
}
#[inline]
pub fn new_single(arg: T) -> (Self, OpArgByte)
where
T: Into<u8>,
{
(Self(PhantomData), OpArgByte(arg.into()))
}
#[inline(always)]
pub fn get(self, arg: OpArg) -> T {
self.try_get(arg).unwrap()
}
#[inline(always)]
pub fn try_get(self, arg: OpArg) -> Option<T> {
T::from_op_arg(arg.0)
}
/// # Safety
/// T::from_op_arg(self) must succeed
#[inline(always)]
pub unsafe fn get_unchecked(self, arg: OpArg) -> T {
// SAFETY: requirements forwarded from caller
unsafe { T::from_op_arg(arg.0).unwrap_unchecked() }
}
}
impl<T: OpArgType> PartialEq for Arg<T> {
fn eq(&self, _: &Self) -> bool {
true
}
}
impl<T: OpArgType> Eq for Arg<T> {}
impl<T: OpArgType> fmt::Debug for Arg<T> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "Arg<{}>", std::any::type_name::<T>())
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Ord, PartialOrd)]
#[repr(transparent)]
// XXX: if you add a new instruction that stores a Label, make sure to add it in
// Instruction::label_arg
pub struct Label(pub u32);
impl OpArgType for Label {
#[inline(always)]
fn from_op_arg(x: u32) -> Option<Self> {
Some(Self(x))
}
#[inline(always)]
fn to_op_arg(self) -> u32 {
self.0
}
}
impl fmt::Display for Label {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.fmt(f)
}
}
op_arg_enum!(
/// The kind of Raise that occurred.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(u8)]
pub enum RaiseKind {
Reraise = 0,
Raise = 1,
RaiseCause = 2,
}
);
op_arg_enum!(
/// Intrinsic function for CALL_INTRINSIC_1
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(u8)]
pub enum IntrinsicFunction1 {
// Invalid = 0,
Print = 1,
/// Import * operation
ImportStar = 2,
// StopIterationError = 3,
// AsyncGenWrap = 4,
// UnaryPositive = 5,
/// Convert list to tuple
ListToTuple = 6,
/// Type parameter related
TypeVar = 7,
ParamSpec = 8,
TypeVarTuple = 9,
/// Generic subscript for PEP 695
SubscriptGeneric = 10,
TypeAlias = 11,
}
);
op_arg_enum!(
/// Intrinsic function for CALL_INTRINSIC_2
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[repr(u8)]
pub enum IntrinsicFunction2 {
PrepReraiseStar = 1,
TypeVarWithBound = 2,
TypeVarWithConstraint = 3,
SetFunctionTypeParams = 4,
/// Set default value for type parameter (PEP 695)
SetTypeparamDefault = 5,
}
);
pub type NameIdx = u32;
/// A Single bytecode instruction.
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[repr(u8)]
pub enum Instruction {
BeforeAsyncWith,
BinaryOp {
op: Arg<BinaryOperator>,
},
BinarySubscript,
Break {
target: Arg<Label>,
},
BuildListFromTuples {
size: Arg<u32>,
},
BuildList {
size: Arg<u32>,
},
BuildMapForCall {
size: Arg<u32>,
},
BuildMap {
size: Arg<u32>,
},
BuildSetFromTuples {
size: Arg<u32>,
},
BuildSet {
size: Arg<u32>,
},
BuildSlice {
argc: Arg<BuildSliceArgCount>,
},
BuildString {
size: Arg<u32>,
},
BuildTupleFromIter,
BuildTupleFromTuples {
size: Arg<u32>,
},
BuildTuple {
size: Arg<u32>,
},
CallFunctionEx {
has_kwargs: Arg<bool>,
},
CallFunctionKeyword {
nargs: Arg<u32>,
},
CallFunctionPositional {
nargs: Arg<u32>,
},
CallIntrinsic1 {
func: Arg<IntrinsicFunction1>,
},
CallIntrinsic2 {
func: Arg<IntrinsicFunction2>,
},
CallMethodEx {
has_kwargs: Arg<bool>,
},
CallMethodKeyword {
nargs: Arg<u32>,
},
CallMethodPositional {
nargs: Arg<u32>,
},
/// Check if exception matches except* handler type.
/// Pops exc_value and match_type, pushes (rest, match).
CheckEgMatch,
CompareOperation {
op: Arg<ComparisonOperator>,
},
/// Performs `in` comparison, or `not in` if `invert` is 1.
ContainsOp(Arg<Invert>),
Continue {
target: Arg<Label>,
},
/// Convert value to a string, depending on `oparg`:
///
/// ```python
/// value = STACK.pop()
/// result = func(value)
/// STACK.append(result)
/// ```
///
/// Used for implementing formatted string literals (f-strings).
ConvertValue {
oparg: Arg<ConvertValueOparg>,
},
CopyItem {
index: Arg<u32>,
},
DeleteAttr {
idx: Arg<NameIdx>,
},
DeleteDeref(Arg<NameIdx>),
DeleteFast(Arg<NameIdx>),
DeleteGlobal(Arg<NameIdx>),
DeleteLocal(Arg<NameIdx>),
DeleteSubscript,
DictUpdate {
index: Arg<u32>,
},
EndAsyncFor,
/// Marker bytecode for the end of a finally sequence.
/// When this bytecode is executed, the eval loop does one of those things:
/// - Continue at a certain bytecode position
/// - Propagate the exception
/// - Return from a function
/// - Do nothing at all, just continue
EndFinally,
/// Enter a finally block, without returning, excepting, just because we are there.
EnterFinally,
ExtendedArg,
ForIter {
target: Arg<Label>,
},
/// Formats the value on top of stack:
///
/// ```python
/// value = STACK.pop()
/// result = value.__format__("")
/// STACK.append(result)
/// ```
///
/// Used for implementing formatted string literals (f-strings).
FormatSimple,
/// Formats the given value with the given format spec:
///
/// ```python
/// spec = STACK.pop()
/// value = STACK.pop()
/// result = value.__format__(spec)
/// STACK.append(result)
/// ```
///
/// Used for implementing formatted string literals (f-strings).
FormatWithSpec,
GetAIter,
GetANext,
GetAwaitable,
GetIter,
GetLen,
/// from ... import ...
ImportFrom {
idx: Arg<NameIdx>,
},
/// Importing by name
ImportName {
idx: Arg<NameIdx>,
},
/// Performs `is` comparison, or `is not` if `invert` is 1.
IsOp(Arg<Invert>),
/// Peek at the top of the stack, and jump if this value is false.
/// Otherwise, pop top of stack.
JumpIfFalseOrPop {
target: Arg<Label>,
},
/// Performs exception matching for except.
/// Tests whether the STACK[-2] is an exception matching STACK[-1].
/// Pops STACK[-1] and pushes the boolean result of the test.
JumpIfNotExcMatch(Arg<Label>),
/// Peek at the top of the stack, and jump if this value is true.
/// Otherwise, pop top of stack.
JumpIfTrueOrPop {
target: Arg<Label>,
},
Jump {
target: Arg<Label>,
},
ListAppend {
i: Arg<u32>,
},
LoadAttr {
idx: Arg<NameIdx>,
},
LoadBuildClass,
LoadClassDeref(Arg<NameIdx>),
LoadClosure(Arg<NameIdx>),
LoadConst {
/// index into constants vec
idx: Arg<u32>,
},
LoadDeref(Arg<NameIdx>),
LoadFast(Arg<NameIdx>),
LoadGlobal(Arg<NameIdx>),
LoadMethod {
idx: Arg<NameIdx>,
},
LoadNameAny(Arg<NameIdx>),
MakeFunction,
MapAdd {
i: Arg<u32>,
},
MatchClass(Arg<u32>),
MatchKeys,
MatchMapping,
MatchSequence,
Nop,
PopBlock,
PopException,
/// Pop the top of the stack, and jump if this value is false.
PopJumpIfFalse {
target: Arg<Label>,
},
/// Pop the top of the stack, and jump if this value is true.
PopJumpIfTrue {
target: Arg<Label>,
},
/// Removes the top-of-stack item:
/// ```py
/// STACK.pop()
/// ```
PopTop,
Raise {
kind: Arg<RaiseKind>,
},
/// Resume execution (e.g., at function start, after yield, etc.)
Resume {
arg: Arg<u32>,
},
ReturnConst {
idx: Arg<u32>,
},
ReturnValue,
Reverse {
amount: Arg<u32>,
},
SetAdd {
i: Arg<u32>,
},
SetFunctionAttribute {
attr: Arg<MakeFunctionFlags>,
},
SetupAnnotation,
SetupAsyncWith {
end: Arg<Label>,
},
SetupExcept {
handler: Arg<Label>,
},
/// Setup a finally handler, which will be called whenever one of this events occurs:
/// - the block is popped
/// - the function returns
/// - an exception is returned
SetupFinally {
handler: Arg<Label>,
},
SetupLoop,
SetupWith {
end: Arg<Label>,
},
StoreAttr {
idx: Arg<NameIdx>,
},
StoreDeref(Arg<NameIdx>),
StoreFast(Arg<NameIdx>),
StoreGlobal(Arg<NameIdx>),
StoreLocal(Arg<NameIdx>),
StoreSubscript,
Subscript,
Swap {
index: Arg<u32>,
},
ToBool,
UnaryOperation {
op: Arg<UnaryOperator>,
},
UnpackEx {
args: Arg<UnpackExArgs>,
},
UnpackSequence {
size: Arg<u32>,
},
WithCleanupFinish,
WithCleanupStart,
YieldFrom,
YieldValue,
// If you add a new instruction here, be sure to keep LAST_INSTRUCTION updated
}
// This must be kept up to date to avoid marshaling errors
const LAST_INSTRUCTION: Instruction = Instruction::YieldValue;
const _: () = assert!(mem::size_of::<Instruction>() == 1);
impl From<Instruction> for u8 {
#[inline]
fn from(ins: Instruction) -> Self {
// SAFETY: there's no padding bits
unsafe { std::mem::transmute::<Instruction, Self>(ins) }
}
}
impl TryFrom<u8> for Instruction {
type Error = MarshalError;
#[inline]
fn try_from(value: u8) -> Result<Self, MarshalError> {
if value <= u8::from(LAST_INSTRUCTION) {
Ok(unsafe { std::mem::transmute::<u8, Self>(value) })
} else {
Err(MarshalError::InvalidBytecode)
}
}
}
#[derive(Copy, Clone)]
#[repr(C)]
pub struct CodeUnit {
pub op: Instruction,
pub arg: OpArgByte,
}
const _: () = assert!(mem::size_of::<CodeUnit>() == 2);
impl CodeUnit {
pub const fn new(op: Instruction, arg: OpArgByte) -> Self {
Self { op, arg }
}
}
impl TryFrom<&[u8]> for CodeUnit {
type Error = MarshalError;
fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
match value.len() {
2 => Ok(Self::new(value[0].try_into()?, value[1].into())),
_ => Err(Self::Error::InvalidBytecode),
}
}
}
#[derive(Clone)]
pub struct CodeUnits(Box<[CodeUnit]>);
impl TryFrom<&[u8]> for CodeUnits {
type Error = MarshalError;
fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
if !value.len().is_multiple_of(2) {
return Err(Self::Error::InvalidBytecode);
}
value.chunks_exact(2).map(CodeUnit::try_from).collect()
}
}
impl<const N: usize> From<[CodeUnit; N]> for CodeUnits {
fn from(value: [CodeUnit; N]) -> Self {
Self(Box::from(value))
}
}
impl From<Vec<CodeUnit>> for CodeUnits {
fn from(value: Vec<CodeUnit>) -> Self {
Self(value.into_boxed_slice())
}
}
impl FromIterator<CodeUnit> for CodeUnits {
fn from_iter<T: IntoIterator<Item = CodeUnit>>(iter: T) -> Self {
Self(iter.into_iter().collect())
}
}
impl Deref for CodeUnits {
type Target = [CodeUnit];
fn deref(&self) -> &Self::Target {
&self.0
}
}
use self::Instruction::*;
bitflags! {
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct MakeFunctionFlags: u8 {
const CLOSURE = 0x01;
const ANNOTATIONS = 0x02;
const KW_ONLY_DEFAULTS = 0x04;
const DEFAULTS = 0x08;
const TYPE_PARAMS = 0x10;
}
}
impl OpArgType for MakeFunctionFlags {
#[inline(always)]
fn from_op_arg(x: u32) -> Option<Self> {
Self::from_bits(x as u8)
}
#[inline(always)]
fn to_op_arg(self) -> u32 {
self.bits().into()
}
}
/// A Constant (which usually encapsulates data within it)
///
/// # Examples
/// ```
/// use rustpython_compiler_core::bytecode::ConstantData;
/// let a = ConstantData::Float {value: 120f64};
/// let b = ConstantData::Boolean {value: false};
/// assert_ne!(a, b);
/// ```
#[derive(Debug, Clone)]
pub enum ConstantData {
Tuple { elements: Vec<ConstantData> },