able/rhea
1
0
Fork 0
Code Issues Pull requests 1 Packages Projects Releases Wiki Activity

Removed syntax

Browse source
This commit is contained in:
Erin 2023-10-03 00:30:31 +02:00 committed by ondra05
parent 0c6878b48a
commit a9a1e22760
8 changed files with 2 additions and 574 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

70
Cargo.lock generated
View file

@ -25,31 +25,12 @@ version = "3.13.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
[[package]]
name = "cc"
version = "1.0.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
dependencies = [
"libc",
]
[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "chumsky"
version = "1.0.0-alpha.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cc3172a80699de358070dd99f80ea8badc6cdf8ac2417cb5a96e6d81bf5fe06d"
dependencies = [
"hashbrown",
"stacker",
]
[[package]]
name = "fnv"
version = "1.0.7"
@ -74,12 +55,6 @@ dependencies = [
"hashbrown",
]
[[package]]
name = "libc"
version = "0.2.148"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9cdc71e17332e86d2e1d38c1f99edcb6288ee11b815fb1a4b049eaa2114d369b"
[[package]]
name = "logos"
version = "0.13.0"
@ -127,15 +102,6 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "psm"
version = "0.1.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5787f7cda34e3033a72192c018bc5883100330f362ef279a8cbccfce8bb4e874"
dependencies = [
"cc",
]
[[package]]
name = "quote"
version = "1.0.33"
@ -156,24 +122,10 @@ name = "rhea"
version = "0.1.0"
dependencies = [
"bumpalo",
"chumsky",
"lasso",
"logos",
]
[[package]]
name = "stacker"
version = "0.1.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c886bd4480155fd3ef527d45e9ac8dd7118a898a46530b7b94c3e21866259fce"
dependencies = [
"cc",
"cfg-if",
"libc",
"psm",
"winapi",
]
[[package]]
name = "syn"
version = "2.0.33"
@ -196,25 +148,3 @@ name = "version_check"
version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
[[package]]
name = "winapi"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
dependencies = [
"winapi-i686-pc-windows-gnu",
"winapi-x86_64-pc-windows-gnu",
]
[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

1
Cargo.toml
View file

@ -5,6 +5,5 @@ edition = "2021"
[dependencies]
bumpalo = { version = "3", features = ["collections"] }
chumsky = "1.0.0-alpha"
lasso = "0.7"
logos = "0.13"

12
src/main.rs
View file

@ -1,21 +1,13 @@
// Rhea
use bumpalo::Bump;
use logos::Logos;
use std::io::{stdin, Read};
use utils::default;
mod syntax;
mod utils;
use std::io::{stdin, Read};
use utils::default;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let mut buf = default();
stdin().read_to_string(&mut buf)?;
let lexer = syntax::token::Token::lexer_with_extras(&buf, default());
let arena = Bump::new();
syntax::parser::parse_lexer(lexer, &arena);
Ok(())
}

83
src/syntax/ast.rs
View file

@ -1,83 +0,0 @@
use {super::token::IntLit, chumsky::span::SimpleSpan, lasso::Spur};
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct Spanned<T> {
pub item: T,
pub span: SimpleSpan,
}
impl<T> Spanned<T> {
#[inline]
pub fn new(item: T, span: SimpleSpan) -> Self {
Self { item, span }
}
}
pub type SpanExpr<'a> = Spanned<Expr<'a>>;
pub type ExprRef<'a> = &'a SpanExpr<'a>;
pub type ExprList<'a> = &'a [SpanExpr<'a>];
pub type Ident = Spur;
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Expr<'a> {
Ident(Ident),
Path(ExprList<'a>),
Literal(Literal),
Call(ExprRef<'a>, ExprList<'a>),
Binary(Spanned<BinaryOperator>, ExprRef<'a>, ExprRef<'a>),
Unary(Spanned<UnaryOperator>, ExprRef<'a>),
BindLocal(Spanned<Pattern>, ExprRef<'a>, Option<ExprList<'a>>),
BindIn(
Spanned<Pattern>,
ExprRef<'a>,
ExprList<'a>,
Option<ExprList<'a>>,
),
Set(ExprRef<'a>, ExprRef<'a>),
Match(ExprRef<'a>, &'a [(Spanned<Pattern>, SpanExpr<'a>)]),
Func(&'a [(Spanned<Pattern>, Spanned<Type>)], Spanned<Type>, ExprRef<'a>),
Block(ExprList<'a>),
Unit,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Type {
Ident(Ident),
Unit,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Pattern {
Ident(Ident),
Literal(Literal),
None,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Literal {
String(Spur),
Integer(IntLit),
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum BinaryOperator {
Plus,
Minus,
Star,
Slash,
And,
VLine,
Lt,
Gt,
Equ,
Nequ,
LtEqu,
GtEqu,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum UnaryOperator {
Tilde,
Minus,
Star,
}

3
src/syntax/mod.rs
View file

@ -1,3 +0,0 @@
pub mod ast;
pub mod parser;
pub mod token;

284
src/syntax/parser.rs
View file

@ -1,284 +0,0 @@
use super::ast::Type;
use {
super::{
ast::{BinaryOperator, Expr, Literal, Pattern, SpanExpr, Spanned, UnaryOperator},
token::Token,
},
crate::utils::Pipe,
bumpalo::Bump,
chumsky::{
extra::Full,
input::{Stream, ValueInput},
prelude::*,
},
logos::Lexer,
};
/// Equivalently-named unit variant mapping
macro_rules! equivmap {
($src:ident, $target:ident, [$variant0:ident $(, $variant:ident)* $(,)?] $(,)?) => {
just($src::$variant0).to($target::$variant0)
$(.or(just($src::$variant).to($target::$variant)))*
};
}
fn expr<'a, I>() -> impl Parser<'a, I, SpanExpr<'a>, Extra<'a>> + Clone
where
I: Input<'a, Token = Token, Span = SimpleSpan> + ValueInput<'a>,
{
recursive(|expr| {
let ident = select!(Token::Ident(id) => id);
let literal = select! {
Token::Int(a) => Literal::Integer(a),
Token::String(a) => Literal::String(a)
};
let pattern = select! {
Token::Ident(id) => Pattern::Ident(id),
Token::Underscore => Pattern::None,
}
.or(literal.map(Pattern::Literal))
.map_with_span(Spanned::new);
let type_ = just([Token::LeftParen, Token::RightParen])
.to(Type::Unit)
.or(ident.map(Type::Ident))
.map_with_span(Spanned::new);
let block = expr
.clone()
.separated_by(just(Token::Semicolon))
.allow_trailing()
.pipe(arena_collect)
.delimited_by(just(Token::LeftCurly), just(Token::RightCurly));
let func = just(Token::Func)
.ignore_then(
pattern
.then_ignore(just(Token::Colon))
.then(type_)
.separated_by(just(Token::Comma))
.allow_trailing()
.pipe(arena_collect)
.delimited_by(just(Token::LeftParen), just(Token::RightParen)),
)
.then_ignore(just(Token::Colon))
.then(type_)
.then(
just(Token::Equ)
.ignore_then(expr.clone())
.or(block.clone().map(Expr::Block).map_with_span(Spanned::new)),
)
.map_with_state(|((params, ret), expr), _, state| {
Expr::Func(params, ret, state.arena.alloc(expr))
});
let atom = literal
.map(Expr::Literal)
.or(just([Token::LeftParen, Token::RightParen]).to(Expr::Unit))
.or(ident.map(Expr::Ident))
.or(func)
.map_with_span(Spanned::new)
.or(expr
.clone()
.delimited_by(just(Token::LeftParen), just(Token::RightParen)));
// <expr>(expr1, expr2, …)
let call = atom.clone().foldl_with_state(
expr.clone()
.separated_by(just(Token::Comma))
.allow_trailing()
.pipe(arena_collect)
.delimited_by(just(Token::LeftParen), just(Token::RightParen))
.map_with_span(Spanned::new)
.repeated(),
|expr, paramlist, state: &mut State| {
Spanned::new(
Expr::Call(state.arena.alloc(expr), paramlist.item),
merge_spans(expr.span, paramlist.span),
)
},
);
let path = call
.clone()
.map_with_state(|item, _, state| bumpalo::vec![in state.arena; item])
.foldl(
just(Token::Dot).ignore_then(call).repeated(),
|mut v, expr| {
v.push(expr);
v
},
)
.map(|v| Expr::Path(v.into_bump_slice()))
.map_with_span(Spanned::new);
/* let unary = equivmap!(Token, UnaryOperator, [Minus, Tilde])
.map_with_span(Spanned::new)
.repeated()
.foldr_with_state(call, |op, expr, state| {
Spanned::new(
Expr::Unary(op, state.arena.alloc(expr)),
merge_spans(op.span, expr.span),
)
});
*/
let unary = path.foldl_with_state(
just([Token::Dot, Token::Star])
.to(UnaryOperator::Star)
.or(just(Token::Tilde).to(UnaryOperator::Tilde))
.map_with_span(Spanned::new)
.repeated(),
|expr, op, state| {
Spanned::new(
Expr::Unary(op, state.arena.alloc(expr)),
merge_spans(expr.span, op.span),
)
},
);
// <exprL> OP <exprR>
let binary = unary.clone().foldl_with_state(
equivmap!(
Token,
BinaryOperator,
[Plus, Minus, Star, Slash, And, VLine, Lt, Gt, Equ, Nequ, LtEqu, GtEqu],
)
.map_with_span(Spanned::new)
.then(unary)
.repeated(),
|l, (op, r), state: &mut State| {
Spanned::new(
Expr::Binary(op, state.arena.alloc(l), state.arena.alloc(r)),
merge_spans(l.span, r.span),
)
},
);
let bind = {
let start = pattern.then_ignore(just(Token::Colon)).then(expr.clone()); // <pat> := <expr>
let else_ = just(Token::Else).ignore_then(block.clone()).or_not(); // else {…}
// <pat> := <expr> [else {…}]
let local = start.clone().then(else_.clone()).map_with_state(
|((pat, expr), else_), _, state| {
Expr::BindLocal(pat, &*state.arena.alloc(expr), else_)
},
);
// <pat> := <expr> {…} else {…}
let in_ = start.then(block.clone()).then(else_).map_with_state(
|(((pat, expr), block), else_), _, state| {
Expr::BindIn(pat, &*state.arena.alloc(expr), block, else_)
},
);
in_.or(local)
};
// <atom> ← <expr>
let set = atom
.clone()
.then_ignore(just(Token::LArrow))
.then(expr.clone())
.map_with_state(|(place, expr), _, state| {
Expr::Set(state.arena.alloc(place), state.arena.alloc(expr))
});
// <expr>.match { <pat> → <expr>, … }
let match_ = atom
.clone()
.then_ignore(just([Token::Dot, Token::Match]))
.then(
pattern
.then_ignore(just(Token::RArrow))
.then(expr)
.separated_by(just(Token::Comma))
.allow_trailing()
.pipe(arena_collect)
.delimited_by(just(Token::LeftCurly), just(Token::RightCurly)),
)
.map_with_state(|(expr, branches), _, state| {
Expr::Match(state.arena.alloc(expr), branches)
});
bind.or(set)
.or(match_)
.or(block.map(Expr::Block))
.map_with_span(Spanned::new)
.or(binary)
.or(atom)
})
}
pub struct State<'a> {
pub arena: &'a Bump,
}
type Extra<'a> = Full<Rich<'a, Token>, State<'a>, ()>;
type ParseResult = ();
pub fn parse_input<'a>(
input: impl ValueInput<'a, Token = Token, Span = SimpleSpan>,
arena: &'a Bump,
) -> ParseResult {
println!(
"{:?}",
expr()
.separated_by(just(Token::Semicolon))
.allow_trailing()
.pipe(arena_collect)
.parse_with_state(input, &mut State { arena })
);
}
pub fn parse_iter(
input: impl Iterator<Item = (Token, SimpleSpan)>,
eoi: impl Into<SimpleSpan>,
arena: &Bump,
) -> ParseResult {
parse_input(Stream::from_iter(input).spanned(eoi.into()), arena)
}
pub fn parse_lexer(input: Lexer<Token>, arena: &Bump) -> ParseResult {
let end = input.span().end;
parse_iter(
input
.spanned()
.map(|(token, span)| (token.unwrap_or(Token::Invalid), span.into())),
end..end + 1,
arena,
)
}
fn arena_collect<'a, I, O: 'a>(
parser: impl IterParser<'a, I, O, Extra<'a>> + Clone,
) -> impl Parser<'a, I, &'a [O], Extra<'a>> + Clone
where
I: Input<'a, Span = SimpleSpan, Token = Token>,
{
empty()
.map_with_state(|_, _, state: &mut State| bumpalo::vec![in state.arena])
.foldl(parser, |mut v, o| {
v.push(o);
v
})
.map(bumpalo::collections::Vec::into_bump_slice)
}
fn arena_box<'a, I, O: 'a>(
parser: impl Parser<'a, I, O, Extra<'a>> + Clone,
) -> impl Parser<'a, I, &'a O, Extra<'a>> + Clone
where
I: Input<'a, Span = SimpleSpan, Token = Token>,
{
parser.map_with_state(|item, _, state| &*state.arena.alloc(item))
}
#[inline]
fn merge_spans(start: SimpleSpan, end: SimpleSpan) -> SimpleSpan {
SimpleSpan::new(start.start, end.end)
}

112
src/syntax/token.rs
View file

@ -1,112 +0,0 @@
use lasso::Spur;
use logos::Lexer;
use {lasso::Rodeo, logos::Logos};
#[derive(Default)]
pub struct Lextras {
pub interner: Rodeo,
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum IntLit {
Signed(i64),
Unsigned(u64),
}
#[derive(Logos, Copy, Clone, Debug, PartialEq, Eq)]
#[logos(extras = Lextras)]
#[logos(skip r"[ \t\n\f]+")]
#[logos(skip r"-- .*")]
#[rustfmt::skip]
pub enum Token {
#[token("(")] LeftParen,
#[token(")")] RightParen,
#[token("{")] LeftCurly,
#[token("}")] RightCurly,
#[token(".")] Dot,
#[token(",")] Comma,
#[token(":")] Colon,
#[token(";")] Semicolon,
#[token("_")] Underscore,
#[token("←")] //____
#[token("<-")] LArrow,
#[token("→")] //____
#[token("->")] RArrow,
#[token(":>")] Pipe,
#[token("+")] Plus,
#[token("-")] Minus,
#[token("*")] Star,
#[token("/")] Slash,
#[token("&")] And,
#[token("|")] VLine,
#[token("~")] Tilde,
#[token("<")] Lt,
#[token(">")] Gt,
#[token("=")] Equ,
#[token("≠") ] //__
#[token("/=")] Nequ,
#[token("≤") ] //___
#[token("<=")] LtEqu,
#[token("≥") ] //___,
#[token(">=")] GtEqu,
#[token("match")] Match,
#[token("else")] Else,
#[token("loop")] Loop,
#[token("const")] Const,
#[token("var")] Var,
#[token("func")] Func,
// Modules aren't real here ondra just variables with imported functions
#[token("module")] Module,
#[regex(
r"\p{XID_Start}\p{XID_Continue}*",
|l| l.extras.interner.get_or_intern(l.slice())
)] Ident(Spur),
#[token("»", better_string)]
#[regex(
"\"[^\"]*\"",
|l| {
let slice = l.slice();
l.extras.interner.get_or_intern(&slice[1..slice.len() - 1])
}
)] String(Spur),
#[regex(
"-?[0-9]+",
|l| {
Some(if let Some(slice) = l.slice().strip_prefix('-') {
IntLit::Signed(slice.parse::<i64>().ok()?)
} else {
IntLit::Unsigned(l.slice().parse::<u64>().ok()?)
})
}
)] Int(IntLit),
Invalid,
}
// For Evy, with love.
fn better_string(lexer: &mut Lexer<Token>) -> Option<Spur> {
let mut count = 1;
for (ix, chr) in lexer.remainder().char_indices() {
match chr {
'«' => count -= 1,
'»' => count += 1,
_ => (),
}
if count == 0 {
let slice = &lexer.remainder()[..ix];
lexer.bump(ix + '«'.len_utf8());
return Some(lexer.extras.interner.get_or_intern(slice));
}
}
None
}

11
src/utils.rs
View file

@ -2,14 +2,3 @@
pub fn default<T: Default>() -> T {
Default::default()
}
pub trait Pipe {
fn pipe<R>(self, mut f: impl FnMut(Self) -> R) -> R
where
Self: Sized,
{
f(self)
}
}
impl<T> Pipe for T {}