632 lines
15 KiB
Rust
632 lines
15 KiB
Rust
use crate::arena::*;
|
|
use crate::atom_table::*;
|
|
use crate::parser::char_reader::*;
|
|
use crate::types::HeapCellValueTag;
|
|
|
|
use std::cell::Cell;
|
|
use std::fmt;
|
|
use std::hash::Hash;
|
|
use std::io::{Error as IOError};
|
|
use std::ops::Neg;
|
|
use std::rc::Rc;
|
|
use std::vec::Vec;
|
|
|
|
use rug::{Integer, Rational};
|
|
|
|
use indexmap::IndexMap;
|
|
use modular_bitfield::error::OutOfBounds;
|
|
use modular_bitfield::prelude::*;
|
|
|
|
pub type Specifier = u32;
|
|
|
|
pub const MAX_ARITY: usize = 1023;
|
|
|
|
pub const XFX: u32 = 0x0001;
|
|
pub const XFY: u32 = 0x0002;
|
|
pub const YFX: u32 = 0x0004;
|
|
pub const XF: u32 = 0x0010;
|
|
pub const YF: u32 = 0x0020;
|
|
pub const FX: u32 = 0x0040;
|
|
pub const FY: u32 = 0x0080;
|
|
pub const DELIMITER: u32 = 0x0100;
|
|
pub const TERM: u32 = 0x1000;
|
|
pub const LTERM: u32 = 0x3000;
|
|
|
|
pub const NEGATIVE_SIGN: u32 = 0x0200;
|
|
|
|
#[macro_export]
|
|
macro_rules! fixnum {
|
|
($wrapper:tt, $n:expr, $arena:expr) => {
|
|
Fixnum::build_with_checked($n)
|
|
.map(<$wrapper>::Fixnum)
|
|
.unwrap_or_else(|_| <$wrapper>::Integer(arena_alloc!(Integer::from($n), $arena)))
|
|
};
|
|
}
|
|
|
|
macro_rules! is_term {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::TERM) != 0
|
|
};
|
|
}
|
|
|
|
macro_rules! is_lterm {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::LTERM) != 0
|
|
};
|
|
}
|
|
|
|
macro_rules! is_op {
|
|
($x:expr) => {
|
|
$x as u32
|
|
& ($crate::parser::ast::XF
|
|
| $crate::parser::ast::YF
|
|
| $crate::parser::ast::FX
|
|
| $crate::parser::ast::FY
|
|
| $crate::parser::ast::XFX
|
|
| $crate::parser::ast::XFY
|
|
| $crate::parser::ast::YFX)
|
|
!= 0
|
|
};
|
|
}
|
|
|
|
macro_rules! is_negate {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::NEGATIVE_SIGN) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_prefix {
|
|
($x:expr) => {
|
|
$x as u32 & ($crate::parser::ast::FX | $crate::parser::ast::FY) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_postfix {
|
|
($x:expr) => {
|
|
$x as u32 & ($crate::parser::ast::XF | $crate::parser::ast::YF) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_infix {
|
|
($x:expr) => {
|
|
($x as u32
|
|
& ($crate::parser::ast::XFX | $crate::parser::ast::XFY | $crate::parser::ast::YFX))
|
|
!= 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_xfx {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::XFX) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_xfy {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::XFY) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_yfx {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::YFX) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_yf {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::YF) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_xf {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::XF) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_fx {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::FX) != 0
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! is_fy {
|
|
($x:expr) => {
|
|
($x as u32 & $crate::parser::ast::FY) != 0
|
|
};
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
|
|
pub enum RegType {
|
|
Perm(usize),
|
|
Temp(usize),
|
|
}
|
|
|
|
impl Default for RegType {
|
|
fn default() -> Self {
|
|
RegType::Temp(0)
|
|
}
|
|
}
|
|
|
|
impl RegType {
|
|
pub fn reg_num(self) -> usize {
|
|
match self {
|
|
RegType::Perm(reg_num) | RegType::Temp(reg_num) => reg_num,
|
|
}
|
|
}
|
|
|
|
pub fn is_perm(self) -> bool {
|
|
matches!(self, RegType::Perm(_))
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for RegType {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
match self {
|
|
RegType::Perm(val) => write!(f, "Y{}", val),
|
|
RegType::Temp(val) => write!(f, "X{}", val),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
|
|
pub enum VarReg {
|
|
ArgAndNorm(RegType, usize),
|
|
Norm(RegType),
|
|
}
|
|
|
|
impl VarReg {
|
|
pub fn norm(self) -> RegType {
|
|
match self {
|
|
VarReg::ArgAndNorm(reg, _) | VarReg::Norm(reg) => reg,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for VarReg {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
match self {
|
|
VarReg::Norm(RegType::Perm(reg)) => write!(f, "Y{}", reg),
|
|
VarReg::Norm(RegType::Temp(reg)) => write!(f, "X{}", reg),
|
|
VarReg::ArgAndNorm(RegType::Perm(reg), arg) => write!(f, "Y{} A{}", reg, arg),
|
|
VarReg::ArgAndNorm(RegType::Temp(reg), arg) => write!(f, "X{} A{}", reg, arg),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Default for VarReg {
|
|
fn default() -> Self {
|
|
VarReg::Norm(RegType::default())
|
|
}
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! temp_v {
|
|
($x:expr) => {
|
|
$crate::parser::ast::RegType::Temp($x)
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
macro_rules! perm_v {
|
|
($x:expr) => {
|
|
$crate::parser::ast::RegType::Perm($x)
|
|
};
|
|
}
|
|
|
|
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
|
|
pub enum GenContext {
|
|
Head,
|
|
Mid(usize),
|
|
Last(usize), // Mid & Last: chunk_num
|
|
}
|
|
|
|
impl GenContext {
|
|
pub fn chunk_num(self) -> usize {
|
|
match self {
|
|
GenContext::Head => 0,
|
|
GenContext::Mid(cn) | GenContext::Last(cn) => cn,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[bitfield]
|
|
#[derive(Copy, Clone, Debug, PartialEq, Eq, Ord, PartialOrd, Hash)]
|
|
pub struct OpDesc {
|
|
prec: B11,
|
|
spec: B8,
|
|
#[allow(unused)] padding: B13,
|
|
}
|
|
|
|
impl OpDesc {
|
|
#[inline]
|
|
pub fn build_with(prec: u16, spec: u8) -> Self {
|
|
OpDesc::new().with_spec(spec).with_prec(prec)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn get(self) -> (u16, u8) {
|
|
(self.prec(), self.spec())
|
|
}
|
|
|
|
pub fn set(&mut self, prec: u16, spec: u8) {
|
|
self.set_prec(prec);
|
|
self.set_spec(spec);
|
|
}
|
|
|
|
#[inline]
|
|
pub fn get_prec(self) -> u16 {
|
|
self.prec()
|
|
}
|
|
|
|
#[inline]
|
|
pub fn get_spec(self) -> u8 {
|
|
self.spec()
|
|
}
|
|
|
|
#[inline]
|
|
pub fn arity(self) -> usize {
|
|
if self.spec() as u32 & (XFX | XFY | YFX) == 0 {
|
|
1
|
|
} else {
|
|
2
|
|
}
|
|
}
|
|
}
|
|
|
|
// name and fixity -> operator type and precedence.
|
|
pub type OpDir = IndexMap<(Atom, Fixity), OpDesc>;
|
|
|
|
#[derive(Debug, Clone, Copy)]
|
|
pub struct MachineFlags {
|
|
pub double_quotes: DoubleQuotes,
|
|
}
|
|
|
|
impl Default for MachineFlags {
|
|
fn default() -> Self {
|
|
MachineFlags {
|
|
double_quotes: DoubleQuotes::default(),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy)]
|
|
pub enum DoubleQuotes {
|
|
Atom,
|
|
Chars,
|
|
Codes,
|
|
}
|
|
|
|
impl DoubleQuotes {
|
|
pub fn is_chars(self) -> bool {
|
|
matches!(self, DoubleQuotes::Chars)
|
|
}
|
|
|
|
pub fn is_atom(self) -> bool {
|
|
matches!(self, DoubleQuotes::Atom)
|
|
}
|
|
|
|
pub fn is_codes(self) -> bool {
|
|
matches!(self, DoubleQuotes::Codes)
|
|
}
|
|
}
|
|
|
|
impl Default for DoubleQuotes {
|
|
fn default() -> Self {
|
|
DoubleQuotes::Chars
|
|
}
|
|
}
|
|
|
|
pub fn default_op_dir() -> OpDir {
|
|
let mut op_dir = OpDir::new();
|
|
|
|
op_dir.insert(
|
|
(atom!(":-"), Fixity::In),
|
|
OpDesc::build_with(1200, XFX as u8),
|
|
);
|
|
op_dir.insert(
|
|
(atom!(":-"), Fixity::Pre),
|
|
OpDesc::build_with(1200, FX as u8),
|
|
);
|
|
op_dir.insert(
|
|
(atom!("?-"), Fixity::Pre),
|
|
OpDesc::build_with(1200, FX as u8),
|
|
);
|
|
op_dir.insert(
|
|
(atom!(","), Fixity::In),
|
|
OpDesc::build_with(1000, XFY as u8),
|
|
);
|
|
|
|
op_dir
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub enum ArithmeticError {
|
|
NonEvaluableFunctor(Literal, usize),
|
|
UninstantiatedVar,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub enum ParserError {
|
|
BackQuotedString(usize, usize),
|
|
UnexpectedChar(char, usize, usize),
|
|
UnexpectedEOF,
|
|
IO(IOError),
|
|
IncompleteReduction(usize, usize),
|
|
InvalidSingleQuotedCharacter(char),
|
|
MissingQuote(usize, usize),
|
|
NonPrologChar(usize, usize),
|
|
ParseBigInt(usize, usize),
|
|
LexicalError(lexical::Error),
|
|
Utf8Error(usize, usize),
|
|
}
|
|
|
|
impl ParserError {
|
|
pub fn line_and_col_num(&self) -> Option<(usize, usize)> {
|
|
match self {
|
|
&ParserError::BackQuotedString(line_num, col_num)
|
|
| &ParserError::UnexpectedChar(_, line_num, col_num)
|
|
| &ParserError::IncompleteReduction(line_num, col_num)
|
|
| &ParserError::MissingQuote(line_num, col_num)
|
|
| &ParserError::NonPrologChar(line_num, col_num)
|
|
| &ParserError::ParseBigInt(line_num, col_num)
|
|
| &ParserError::Utf8Error(line_num, col_num) => Some((line_num, col_num)),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn as_atom(&self) -> Atom {
|
|
match self {
|
|
ParserError::BackQuotedString(..) => atom!("back_quoted_string"),
|
|
ParserError::UnexpectedChar(..) => atom!("unexpected_char"),
|
|
ParserError::UnexpectedEOF => atom!("unexpected_end_of_file"),
|
|
ParserError::IncompleteReduction(..) => atom!("incomplete_reduction"),
|
|
ParserError::InvalidSingleQuotedCharacter(..) => atom!("invalid_single_quoted_character"),
|
|
ParserError::IO(_) => atom!("input_output_error"),
|
|
ParserError::LexicalError(_) => atom!("lexical_error"), // TODO: ?
|
|
ParserError::MissingQuote(..) => atom!("missing_quote"),
|
|
ParserError::NonPrologChar(..) => atom!("non_prolog_character"),
|
|
ParserError::ParseBigInt(..) => atom!("cannot_parse_big_int"),
|
|
ParserError::Utf8Error(..) => atom!("utf8_conversion_error"),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<lexical::Error> for ParserError {
|
|
fn from(e: lexical::Error) -> ParserError {
|
|
ParserError::LexicalError(e)
|
|
}
|
|
}
|
|
|
|
impl From<IOError> for ParserError {
|
|
fn from(e: IOError) -> ParserError {
|
|
ParserError::IO(e)
|
|
}
|
|
}
|
|
|
|
impl From<&IOError> for ParserError {
|
|
fn from(error: &IOError) -> ParserError {
|
|
if error.get_ref().filter(|e| e.is::<BadUtf8Error>()).is_some() {
|
|
ParserError::Utf8Error(0, 0)
|
|
} else {
|
|
ParserError::IO(error.kind().into())
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy)]
|
|
pub struct CompositeOpDir<'a, 'b> {
|
|
pub primary_op_dir: Option<&'b OpDir>,
|
|
pub secondary_op_dir: &'a OpDir,
|
|
}
|
|
|
|
impl<'a, 'b> CompositeOpDir<'a, 'b> {
|
|
#[inline]
|
|
pub fn new(secondary_op_dir: &'a OpDir, primary_op_dir: Option<&'b OpDir>) -> Self {
|
|
CompositeOpDir {
|
|
primary_op_dir,
|
|
secondary_op_dir,
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
pub(crate) fn get(&self, name: Atom, fixity: Fixity) -> Option<OpDesc> {
|
|
let entry = if let Some(ref primary_op_dir) = &self.primary_op_dir {
|
|
primary_op_dir.get(&(name, fixity))
|
|
} else {
|
|
None
|
|
};
|
|
|
|
entry
|
|
.or_else(move || self.secondary_op_dir.get(&(name, fixity)))
|
|
.cloned()
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Copy, Eq, Hash, PartialEq, PartialOrd, Ord)]
|
|
pub enum Fixity {
|
|
In,
|
|
Post,
|
|
Pre,
|
|
}
|
|
|
|
#[bitfield]
|
|
#[repr(u64)]
|
|
#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
|
|
pub struct Fixnum {
|
|
num: B57,
|
|
#[allow(unused)] m: bool,
|
|
#[allow(unused)] tag: B6,
|
|
}
|
|
|
|
impl Fixnum {
|
|
#[inline]
|
|
pub fn build_with(num: i64) -> Self {
|
|
Fixnum::new()
|
|
.with_num(u64::from_ne_bytes(num.to_ne_bytes()) & ((1 << 57) - 1))
|
|
.with_tag(HeapCellValueTag::Fixnum as u8)
|
|
.with_m(false)
|
|
//num as u64).with__m(false)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn build_with_checked(num: i64) -> Result<Self, OutOfBounds> {
|
|
const UPPER_BOUND: i64 = (1 << 56) - 1;
|
|
const LOWER_BOUND: i64 = -(1 << 56);
|
|
|
|
if LOWER_BOUND <= num && num <= UPPER_BOUND {
|
|
Ok(Fixnum::new()
|
|
.with_m(false)
|
|
.with_tag(HeapCellValueTag::Fixnum as u8)
|
|
.with_num(u64::from_ne_bytes(num.to_ne_bytes()) & ((1 << 57) - 1))) //num as u64 & ((1 << 57) - 1)))
|
|
} else {
|
|
Err(OutOfBounds {})
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
pub fn get_num(self) -> i64 {
|
|
let n = self.num() as i64;
|
|
let (n, overflowed) = (n << 7).overflowing_shr(7); // sign-extend the 57-bit signed fixnum.
|
|
debug_assert_eq!(overflowed, false);
|
|
n
|
|
}
|
|
}
|
|
|
|
impl Neg for Fixnum {
|
|
type Output = Self;
|
|
|
|
#[inline]
|
|
fn neg(self) -> Self::Output {
|
|
Fixnum::build_with(-self.get_num())
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
|
|
pub enum Literal {
|
|
Atom(Atom),
|
|
Char(char),
|
|
Fixnum(Fixnum),
|
|
Integer(TypedArenaPtr<Integer>),
|
|
Rational(TypedArenaPtr<Rational>),
|
|
Float(F64Ptr),
|
|
String(Atom),
|
|
}
|
|
|
|
impl fmt::Display for Literal {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
match self {
|
|
Literal::Atom(ref atom) => {
|
|
// if atom.as_str().chars().any(|c| "`.$'\" ".contains(c)) {
|
|
// write!(f, "'{}'", atom)
|
|
// } else {
|
|
write!(f, "{}", atom.flat_index())
|
|
// }
|
|
}
|
|
Literal::Char(c) => write!(f, "'{}'", *c as u32),
|
|
Literal::Fixnum(n) => write!(f, "{}", n.get_num()),
|
|
Literal::Integer(ref n) => write!(f, "{}", n),
|
|
Literal::Rational(ref n) => write!(f, "{}", n),
|
|
Literal::Float(ref n) => write!(f, "{}", *n),
|
|
Literal::String(ref s) => write!(f, "\"{}\"", s.as_str()),
|
|
// Literal::Usize(integer) => write!(f, "u{}", integer),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Literal {
|
|
pub fn to_atom(&self, atom_tbl: &mut AtomTable) -> Option<Atom> {
|
|
match self {
|
|
Literal::Atom(atom) => Some(atom.defrock_brackets(atom_tbl)),
|
|
_ => None,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone)]
|
|
pub enum Term {
|
|
AnonVar,
|
|
Clause(Cell<RegType>, Atom, Vec<Term>),
|
|
Cons(Cell<RegType>, Box<Term>, Box<Term>),
|
|
Literal(Cell<RegType>, Literal),
|
|
PartialString(Cell<RegType>, Atom, Option<Box<Term>>),
|
|
Var(Cell<VarReg>, Rc<String>),
|
|
}
|
|
|
|
impl Term {
|
|
pub fn into_literal(self) -> Option<Literal> {
|
|
match self {
|
|
Term::Literal(_, c) => Some(c),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn first_arg(&self) -> Option<&Term> {
|
|
match self {
|
|
Term::Clause(_, _, ref terms) => terms.first(),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn set_name(&mut self, new_name: Atom) {
|
|
match self {
|
|
Term::Literal(_, Literal::Atom(ref mut atom)) | Term::Clause(_, ref mut atom, ..) => {
|
|
*atom = new_name;
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
pub fn name(&self) -> Option<Atom> {
|
|
match self {
|
|
&Term::Literal(_, Literal::Atom(ref atom)) | &Term::Clause(_, ref atom, ..) => {
|
|
Some(*atom)
|
|
}
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn arity(&self) -> usize {
|
|
match self {
|
|
Term::Clause(_, _, ref child_terms, ..) => child_terms.len(),
|
|
_ => 0,
|
|
}
|
|
}
|
|
}
|
|
|
|
fn unfold_by_str_once(term: &mut Term, s: Atom) -> Option<(Term, Term)> {
|
|
if let Term::Clause(_, ref name, ref mut subterms) = term {
|
|
if name == &s && subterms.len() == 2 {
|
|
let snd = subterms.pop().unwrap();
|
|
let fst = subterms.pop().unwrap();
|
|
|
|
return Some((fst, snd));
|
|
}
|
|
}
|
|
|
|
None
|
|
}
|
|
|
|
pub fn unfold_by_str(mut term: Term, s: Atom) -> Vec<Term> {
|
|
let mut terms = vec![];
|
|
|
|
while let Some((fst, snd)) = unfold_by_str_once(&mut term, s) {
|
|
terms.push(fst);
|
|
term = snd;
|
|
}
|
|
|
|
terms.push(term);
|
|
terms
|
|
}
|