lang: parsing to events now

crates/lang/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 logos = "0.14"
-chumsky = {version= "1.0.0-alpha.7", features=["label"]}
+chumsky = {version= "1.0.0-alpha.7", features=["label", "extension"]}
 petgraph = { workspace = true}
 indexmap = "2.2.6"
 clap = { version = "4", features = ["derive"] }

crates/lang/src/lib.rs

@@ -1,3 +1,4 @@
+#![feature(type_alias_impl_trait)]
 pub mod err_reporting;
 pub mod parser;
 pub mod tokens;

crates/lang/src/main.rs

@@ -5,7 +5,7 @@ use lang::{
     err_reporting::ErrorCollector,
     parser::ast::lossless::{
         lex,
-        parser::{self, parser_to_events::to_events},
+        parser::{self, parse},
     },
 };
 
@@ -20,7 +20,7 @@ fn main() {
     let n = args.file.clone();
     let f = fs::read_to_string(n.clone()).expect("failed to read file");
     println!("toks: {:?}", lex::lex(&f));
-    println!("evs: {:?}", to_events(&f));
+    println!("parse res: {:?}", parse(&f));
 
     // let parse_res = parser::parse(&f);
     // println!("parse: {:?}", parse_res);

crates/lang/src/parser/ast/lossless/lex.rs

@@ -10,7 +10,6 @@ pub fn lex(src: &str) -> Vec<(SyntaxKind, &str)> {
         r.push((tok_res.unwrap_or(SyntaxKind::LEX_ERR), lex.slice()))
     }
 
-    r.reverse();
     r
 }
 

crates/lang/src/parser/ast/lossless/parser.rs

@@ -9,24 +9,29 @@ use crate::parser::{
     Span,
 };
 
+use self::parser_to_events::{to_events, Event};
+
 use super::lex::{self, SyntaxKind};
 
 pub mod parser_to_events {
-    use chumsky::Parser;
+    use chumsky::prelude::*;
 
-    use crate::parser::ast::lossless::lex::SyntaxKind::{self, *};
+    use crate::parser::ast::lossless::lex::{
+        self,
+        SyntaxKind::{self, *},
+    };
 
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
-    pub(super) enum Event {
+    pub enum Event {
-        StartNode,
+        StartNode(SyntaxKind),
         StartErr(SyntaxError),
         EatToken,
         FinishNode,
         FinishErr,
     }
 
-    #[derive(Debug, PartialEq, Eq)]
+    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
-    enum SyntaxError {
+    pub enum SyntaxError {
         Expected(SyntaxKind),
         AttrExpectedValue,
         /// guessed if there's a newline and attr on next line without comma
@@ -34,14 +39,107 @@ pub mod parser_to_events {
         ExpectedCommaBetweenAttrs,
     }
 
-    pub fn to_events(src: &str) -> Vec<Event> {
+    pub fn to_events(tokens: &[(SyntaxKind, &str)]) -> Vec<Event> {
-        let mut tokens = lex::lex(src);
+        let mut only_toks: Vec<SyntaxKind> = tokens.iter().map(|(t, _)| *t).collect();
-        parser().parse(tokens)
+        let res = parser().parse(&only_toks);
+        res.unwrap()
     }
 
-    pub fn parser() -> impl Parser<'static, SyntaxKind, Vec<Event>> {
+    macro_rules! padded {
-        let whitespace = just(WHITESPACE).or(NEWLINE).repeated().collect::<Vec<_>>();
+        ($parser:expr) => {{
-        whitespace
+            let ws = one_of([WHITESPACE, NEWLINE])
+                .to(Event::EatToken)
+                .repeated()
+                .collect::<Vec<Event>>();
+            ws.then($parser)
+                .then(ws)
+                .map(|((mut before, mut c), mut after)| {
+                    before.append(&mut c);
+                    before.append(&mut after);
+                    before
+                })
+        }};
+    }
+
+    pub fn parser<'toks>() -> impl Parser<'toks, &'toks [SyntaxKind], Vec<Event>> {
+        let ws = one_of([WHITESPACE, NEWLINE])
+            .to(Event::EatToken)
+            .repeated()
+            .collect::<Vec<Event>>();
+        // let ws_without_newlines = just(WHITESPACE)
+        //     .to(Event::EatToken)
+        //     .repeated()
+        //     .collect::<Vec<Event>>();
+        let parenthesized = |c| {
+            just(L_PAREN)
+                .to(vec![Event::EatToken])
+                .then(c)
+                .then(just(R_PAREN).to(vec![Event::EatToken]))
+                .map(|((mut before, mut c), mut after)| {
+                    before.append(&mut c);
+                    before.append(&mut after);
+                    before
+                })
+        };
+
+        let expr = recursive(|expr| {
+            let lit = one_of([INT_NUM, FLOAT_NUM, STRING]).to(vec![
+                Event::StartNode(EXPR),
+                Event::EatToken,
+                Event::FinishNode,
+            ]);
+
+            let atom = lit.clone().or(parenthesized(expr));
+
+            let ident = just(IDENT).to(vec![Event::EatToken]);
+            let instr_name = ident
+                .clone()
+                .map(|mut v| {
+                    v.insert(0, Event::StartNode(INSTR_NAME));
+                    v
+                })
+                .foldl(
+                    ws.then(ident).repeated(),
+                    |mut ident, (mut ws, mut next)| {
+                        ident.append(&mut ws);
+                        ident.append(&mut next);
+                        ident
+                    },
+                )
+                .map(|mut v| {
+                    v.push(Event::FinishNode);
+                    v
+                });
+            let instr = padded!(instr_name)
+                .then(
+                    atom.clone()
+                        .map(|mut v| {
+                            v.insert(0, Event::StartNode(INSTR_PARAMS));
+                            v
+                        })
+                        .foldl(
+                            ws.then(atom.clone()).repeated(),
+                            |mut cur, (mut ws, mut next)| {
+                                cur.append(&mut ws);
+                                cur.append(&mut next);
+                                cur
+                            },
+                        )
+                        .map(|mut v| {
+                            v.push(Event::FinishNode);
+                            v
+                        }),
+                )
+                .map(|(mut name, mut params)| {
+                    name.insert(0, Event::StartNode(INSTR));
+                    name.append(&mut params);
+                    name.push(Event::FinishNode);
+                    name
+                });
+            padded!(instr.or(lit).or(atom))
+        });
+        expr
+        // .map(|(lit, mut ev)| lit.append(&mut ev));
     }
 }
 
@@ -99,7 +197,7 @@ enum SyntaxError {
 }
 
 pub fn parse(src: &str) -> Parse {
-    let mut tokens = lex::lex(src);
+    let tokens = lex::lex(src);
     Parser {
         tokens,
         builder: GreenNodeBuilder::new(),
@@ -110,12 +208,19 @@ pub fn parse(src: &str) -> Parse {
 
 impl Parser<'_> {
     fn parse(mut self) -> Parse {
-        self.start_node(ROOT);
+        let evs = to_events(&self.tokens);
+        self.builder.start_node(ROOT.into());
 
-        match self.expr(None) {
+        self.tokens.reverse();
-            expr::ExprRes::Ok => (),
+
-            expr::ExprRes::Eof => (),
+        for ev in evs {
-            expr::ExprRes::NoExpr => todo!(),
+            match ev {
+                Event::StartNode(kind) => self.builder.start_node(kind.into()),
+                Event::StartErr(SyntaxError) => todo!(),
+                Event::EatToken => self.bump(),
+                Event::FinishNode => self.builder.finish_node(),
+                Event::FinishErr => todo!(),
+            }
         }
 
         self.builder.finish_node();
@@ -124,13 +229,6 @@ impl Parser<'_> {
         }
     }
 
-    fn start_node(&mut self, kind: SyntaxKind) {
-        self.builder.start_node(kind.into());
-    }
-    fn finish_node(&mut self) {
-        self.builder.finish_node();
-    }
-
     /// Advance one token, adding it to the current branch of the tree builder.
     fn bump(&mut self) {
         let (kind, text) = self.tokens.pop().unwrap();
@@ -143,7 +241,7 @@ impl Parser<'_> {
     }
     fn syntax_err_by_checkpoint(&mut self, checkpoint: Checkpoint, err: SyntaxError) {
         self.builder.start_node_at(checkpoint, PARSE_ERR.into());
-        self.finish_node();
+        self.builder.finish_node();
         self.errors.push(err);
     }
     fn expected(&mut self, expected: SyntaxKind) {
@@ -158,313 +256,4 @@ impl Parser<'_> {
             .get(self.tokens.len() - 2)
             .map(|(kind, _)| *kind)
     }
-    fn skip_ws(&mut self) {
-        while self.current() == Some(WHITESPACE) || self.current() == Some(NEWLINE) {
-            self.bump()
-        }
-    }
-    fn skip_ws_without_newlines(&mut self) {
-        while self.current() == Some(WHITESPACE) {
-            self.bump()
-        }
-    }
-}
-
-mod expr {
-    use rowan::Checkpoint;
-
-    use super::{attrset::AttrsetRes, instr::NodeRes, Parser};
-    use crate::parser::{ast::lossless::lex::SyntaxKind::*, Span};
-    impl Parser<'_> {
-        pub(super) fn expr(&mut self, start: Option<Checkpoint>) -> ExprRes {
-            self.skip_ws();
-            let start = start.unwrap_or_else(|| self.builder.checkpoint());
-            match self.current() {
-                Some(IDENT) => {
-                    let expr_res = match self.instr() {
-                        NodeRes::Ok => ExprRes::Ok,
-                        NodeRes::Eof => ExprRes::Eof,
-                    };
-                    self.builder.start_node_at(start, EXPR.into());
-                    self.finish_node();
-                    expr_res
-                }
-                Some(_) => self.atom(Some(start)),
-                None => ExprRes::Eof,
-            }
-        }
-
-        pub(super) fn atom(&mut self, start: Option<Checkpoint>) -> ExprRes {
-            self.skip_ws();
-            let start = start.unwrap_or_else(|| self.builder.checkpoint());
-            match self.current() {
-                Some(INT_NUM | FLOAT_NUM | STRING) => {
-                    self.bump();
-                    self.builder.start_node_at(start, EXPR.into());
-                    self.finish_node();
-                    ExprRes::Ok
-                }
-                Some(L_CURLY) => match self.attrset(start) {
-                    AttrsetRes::Ok => ExprRes::Ok,
-                    AttrsetRes::Eof => ExprRes::Eof,
-                },
-                Some(L_PAREN) => {
-                    self.builder.start_node_at(start, PARENTHESIZED_EXPR.into());
-                    self.bump();
-                    self.expr(None);
-                    self.skip_ws();
-                    match self.current() {
-                        Some(R_PAREN) => ExprRes::Ok,
-                        Some(_) => todo!(),
-                        None => ExprRes::Eof,
-                    }
-                }
-                Some(_) => ExprRes::NoExpr,
-                None => ExprRes::Eof,
-            }
-        }
-    }
-
-    pub enum ExprRes {
-        Ok,
-        Eof,
-        /// isnt an expression
-        NoExpr,
-    }
-}
-
-mod attrset {
-    use chumsky::container::Container;
-    use rowan::Checkpoint;
-
-    use super::{expr::ExprRes, instr::NodeRes, Parser};
-    use crate::parser::{
-        ast::lossless::{lex::SyntaxKind::*, parser::SyntaxError},
-        Span,
-    };
-    impl Parser<'_> {
-        pub(super) fn attrset(&mut self, checkpoint: Checkpoint) -> AttrsetRes {
-            assert_eq!(self.current(), Some(L_CURLY));
-            self.bump();
-            self.skip_ws();
-            match self.current() {
-                Some(R_CURLY) => {
-                    self.builder.start_node_at(checkpoint, ATTR_SET.into());
-                    self.bump();
-                    self.finish_node();
-                    AttrsetRes::Ok
-                }
-                Some(_) => {
-                    self.builder.start_node_at(checkpoint, ATTR_SET.into());
-                    let res = match self.attrs() {
-                        AttrRes::Eof => AttrsetRes::Eof,
-                        AttrRes::RCurly | AttrRes::Ok => {
-                            println!("curr: {:?}", self.current());
-                            AttrsetRes::Ok
-                        }
-                    };
-                    self.finish_node();
-                    res
-                }
-                None => AttrsetRes::Eof,
-            }
-            // self.start_node(ATTR);
-        }
-
-        fn attrs(&mut self) -> AttrRes {
-            let mut res = AttrRes::Ok;
-
-            while res == AttrRes::Ok {
-                println!("it: {:?}", self.tokens.last());
-                match self.attr() {
-                    AttrRes::Ok => {
-                        self.skip_ws_without_newlines();
-                        println!(
-                            "a: {:?}, {:?}",
-                            self.tokens.last(),
-                            self.tokens.get(self.tokens.len() - 2)
-                        );
-                        println!("errs: {:?}", self.errors);
-                        res = AttrRes::Ok;
-                        let checkpoint_previous_end = self.builder.checkpoint();
-                        res = match self.current() {
-                            Some(COMMA) => {
-                                self.bump();
-                                AttrRes::Ok
-                            }
-                            Some(R_CURLY) => {
-                                self.bump();
-                                res = AttrRes::Ok;
-                                break;
-                            }
-                            Some(NEWLINE) => {
-                                self.skip_ws();
-                                println!(
-                                    "b: {:?}, {:?}",
-                                    self.tokens.last(),
-                                    self.tokens.get(self.tokens.len() - 2)
-                                );
-                                match self.current() {
-                                    Some(COMMA) => {
-                                        self.bump();
-                                        AttrRes::Ok
-                                    }
-                                    Some(R_CURLY) => {
-                                        self.bump();
-                                        res = AttrRes::Ok;
-                                        break;
-                                    }
-                                    Some(IDENT) => {
-                                        println!("wtf");
-                                        self.syntax_err_by_checkpoint(
-                                            checkpoint_previous_end,
-                                            SyntaxError::ExpectedCommaBetweenAttrs,
-                                        );
-                                        // self.syntax_err(SyntaxError::ExpectedCommaBetweenAttrs);
-                                        AttrRes::Ok
-                                    }
-                                    Some(_) => {
-                                        self.bump();
-                                        AttrRes::Ok
-                                    }
-                                    None => {
-                                        res = AttrRes::Eof;
-                                        break;
-                                    }
-                                }
-                            }
-                            Some(_) => {
-                                self.bump();
-                                println!(
-                                    "c: {:?}, {:?}",
-                                    self.tokens.last(),
-                                    self.tokens.get(self.tokens.len() - 2)
-                                );
-                                AttrRes::Ok
-                            }
-                            None => {
-                                res = AttrRes::Eof;
-                                break;
-                            }
-                        }
-                    }
-                    AttrRes::Eof => {
-                        res = AttrRes::Eof;
-                        break;
-                    }
-                    AttrRes::RCurly => {
-                        res = AttrRes::RCurly;
-                        break;
-                    }
-                }
-            }
-            println!("toks_left: {:?}", self.tokens);
-            res
-        }
-
-        fn attr(&mut self) -> AttrRes {
-            self.skip_ws();
-            self.start_node(ATTR);
-            self.start_node(ATTR_NAME);
-            match self.current() {
-                Some(IDENT) => self.bump(),
-                Some(R_CURLY) => return AttrRes::Ok,
-                Some(_) => self.expected(IDENT),
-                None => return AttrRes::Eof,
-            }
-            self.finish_node();
-            self.skip_ws();
-            match self.current() {
-                Some(COLON) => self.bump(),
-                Some(R_CURLY) => {
-                    self.expected(COLON);
-                    return AttrRes::RCurly;
-                }
-                Some(_) => self.expected(COLON),
-                None => return AttrRes::Eof,
-            }
-            self.skip_ws();
-            self.start_node(ATTR_VALUE);
-            match self.expr(None) {
-                ExprRes::Ok => self.bump(),
-                ExprRes::Eof => return AttrRes::Eof,
-                ExprRes::NoExpr => match self.current() {
-                    Some(COMMA) => self.syntax_err(SyntaxError::AttrExpectedValue),
-                    Some(R_CURLY) => {
-                        self.syntax_err(SyntaxError::AttrExpectedValue);
-                        return AttrRes::RCurly;
-                    }
-                    Some(_) => self.expected(EXPR),
-                    None => unreachable!(),
-                },
-            }
-            self.finish_node();
-            self.finish_node();
-            AttrRes::Ok
-        }
-    }
-
-    #[derive(PartialEq, Eq)]
-    pub enum AttrsetRes {
-        Ok,
-        Eof,
-    }
-
-    #[derive(PartialEq, Eq)]
-    enum AttrRes {
-        Ok,
-        Eof,
-        RCurly,
-    }
-}
-
-mod instr {
-    use super::Parser;
-    use crate::parser::{
-        ast::lossless::{lex::SyntaxKind::*, parser::expr::ExprRes},
-        Span,
-    };
-
-    impl Parser<'_> {
-        pub(super) fn instr(&mut self) -> NodeRes {
-            assert_eq!(self.current(), Some(IDENT));
-            self.skip_ws();
-            self.start_node(INSTR);
-            self.instr_name();
-
-            // used to count positionals
-            let mut i = 0;
-            let params_checkpoint = self.builder.checkpoint();
-            loop {
-                match self.expr(None) {
-                    ExprRes::Ok => {
-                        i += 1;
-                        continue;
-                    }
-                    ExprRes::NoExpr | ExprRes::Eof => break,
-                }
-            }
-            if i >= 1 {
-                self.builder
-                    .start_node_at(params_checkpoint, INSTR_PARAMS.into());
-                self.finish_node();
-            }
-            self.finish_node();
-            NodeRes::Ok
-        }
-
-        fn instr_name(&mut self) {
-            self.start_node(INSTR_NAME);
-            while self.current() == Some(IDENT) {
-                self.bump();
-                self.skip_ws_without_newlines();
-            }
-            self.finish_node();
-        }
-    }
-
-    pub(super) enum NodeRes {
-        Ok,
-        Eof,
-    }
 }

flake.lock

@@ -11,11 +11,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1710475558,
+        "lastModified": 1712055811,
-        "narHash": "sha256-egKrPCKjy/cE+NqCj4hg2fNX/NwLCf0bRDInraYXDgs=",
+        "narHash": "sha256-7FcfMm5A/f02yyzuavJe06zLa9hcMHsagE28ADcmQvk=",
         "owner": "cachix",
         "repo": "cachix",
-        "rev": "661bbb7f8b55722a0406456b15267b5426a3bda6",
+        "rev": "02e38da89851ec7fec3356a5c04bc8349cae0e30",
         "type": "github"
       },
       "original": {
@@ -33,11 +33,11 @@
         "pre-commit-hooks": "pre-commit-hooks_2"
       },
       "locked": {
-        "lastModified": 1712724616,
+        "lastModified": 1712925466,
-        "narHash": "sha256-qs9uEbrOpp6oXcDOp5cpilyU52t78ZpEPATtaHRVLIU=",
+        "narHash": "sha256-MJ6VxGNu/ftbn8SErJjBz80FUNXkZfcObHg/JP7wwAc=",
         "owner": "cachix",
         "repo": "devenv",
-        "rev": "d1a11d14dbe96a03c7f9068e4d3af05f283734e0",
+        "rev": "1af93652caf48bfeef6ba7d1cf59fc66e506e5c2",
         "type": "github"
       },
       "original": {
@@ -83,11 +83,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1712730246,
+        "lastModified": 1712903033,
-        "narHash": "sha256-iB8bFj+07RHpmt+XuGGvYQk2Iwm12u6+DklGq/+Tg5s=",
+        "narHash": "sha256-KcvsEm0h1mIwBHFAzWFBjGihnbf2fxpAaXOdVbUfAI4=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "d402ae4a5e5676722290470f61a5e8e3155b5487",
+        "rev": "c739f83545e625227f4d0af7fe2a71e69931fa4c",
         "type": "github"
       },
       "original": {
@@ -335,11 +335,11 @@
         "nixpkgs-regression": "nixpkgs-regression_2"
       },
       "locked": {
-        "lastModified": 1710500156,
+        "lastModified": 1712911606,
-        "narHash": "sha256-zvCqeUO2GLOm7jnU23G4EzTZR7eylcJN+HJ5svjmubI=",
+        "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
         "owner": "domenkozar",
         "repo": "nix",
-        "rev": "c5bbf14ecbd692eeabf4184cc8d50f79c2446549",
+        "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
         "type": "github"
       },
       "original": {
@@ -431,11 +431,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1710236354,
+        "lastModified": 1710796454,
-        "narHash": "sha256-vWrciFdq49vve43g4pbi7NjmL4cwG1ifXnQx+dU3T5E=",
+        "narHash": "sha256-lQlICw60RhH8sHTDD/tJiiJrlAfNn8FDI9c+7G2F0SE=",
         "owner": "cachix",
         "repo": "devenv-nixpkgs",
-        "rev": "829e73affeadfb4198a7105cbe3a03153d13edc9",
+        "rev": "06fb0f1c643aee3ae6838dda3b37ef0abc3c763b",
         "type": "github"
       },
       "original": {
@@ -447,11 +447,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1712608508,
+        "lastModified": 1712791164,
-        "narHash": "sha256-vMZ5603yU0wxgyQeHJryOI+O61yrX2AHwY6LOFyV1gM=",
+        "narHash": "sha256-3sbWO1mbpWsLepZGbWaMovSO7ndZeFqDSdX0hZ9nVyw=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4cba8b53da471aea2ab2b0c1f30a81e7c451f4b6",
+        "rev": "1042fd8b148a9105f3c0aca3a6177fd1d9360ba5",
         "type": "github"
       },
       "original": {
@@ -463,11 +463,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1712608508,
+        "lastModified": 1712791164,
-        "narHash": "sha256-vMZ5603yU0wxgyQeHJryOI+O61yrX2AHwY6LOFyV1gM=",
+        "narHash": "sha256-3sbWO1mbpWsLepZGbWaMovSO7ndZeFqDSdX0hZ9nVyw=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "4cba8b53da471aea2ab2b0c1f30a81e7c451f4b6",
+        "rev": "1042fd8b148a9105f3c0aca3a6177fd1d9360ba5",
         "type": "github"
       },
       "original": {
@@ -543,11 +543,11 @@
         "nixpkgs-stable": "nixpkgs-stable_2"
       },
       "locked": {
-        "lastModified": 1712055707,
+        "lastModified": 1712897695,
-        "narHash": "sha256-4XLvuSIDZJGS17xEwSrNuJLL7UjDYKGJSbK1WWX2AK8=",
+        "narHash": "sha256-nMirxrGteNAl9sWiOhoN5tIHyjBbVi5e2tgZUgZlK3Y=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "e35aed5fda3cc79f88ed7f1795021e559582093a",
+        "rev": "40e6053ecb65fcbf12863338a6dcefb3f55f1bf8",
         "type": "github"
       },
       "original": {
@@ -567,11 +567,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1712663608,
+        "lastModified": 1712818880,
-        "narHash": "sha256-tN9ZL6kGppmHg84lxlpAlaN+kXWNctKK7Yitq/iXDEw=",
+        "narHash": "sha256-VDxsvgj/bNypHq48tQWtc3VRbWvzlFjzKf9ZZIVO10Y=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "a5feb4f05f09adca661c869b1bf2324898cbaa43",
+        "rev": "657b33b0cb9bd49085202e91ad5b4676532c9140",
         "type": "github"
       },
       "original": {

flake.nix

@@ -15,6 +15,7 @@
     self,
     nixpkgs,
     devenv,
+    fenix,
     systems,
     ...
   } @ inputs: let
@@ -24,6 +25,11 @@
       forEachSystem
       (system: let
         pkgs = nixpkgs.legacyPackages.${system};
+        toolchain = with fenix.packages.${system};
+          combine [
+            default.toolchain
+            rust-analyzer
+          ];
       in {
         default = devenv.lib.mkShell {
           inherit inputs pkgs;
@@ -33,17 +39,18 @@
               config,
               ...
             }: {
-              languages.rust = {
+              # languages.rust = {
-                enable = true;
+              #   enable = true;
-                channel = "nightly";
+              #   channel = "nightly";
-                components = [
+              #   components = [
-                  "rustc"
+              #     "rustc"
-                  "cargo"
+              #     "cargo"
-                  "clippy"
+              #     "clippy"
-                  "rustfmt"
+              #     "rustfmt"
-                  "rust-src"
+              #     "rust-src"
-                ];
+              #     "rust-analyzer"
-              };
+              #   ];
+              # };
 
               pre-commit.hooks = {
                 clippy.enable = false;
@@ -59,7 +66,7 @@
                 mold
                 cargo-nextest
                 cargo-watch
-                rust-analyzer
+                toolchain
               ];
             })
           ];

testfiles/test.owo

@@ -1,4 +1 @@
-meow mew meow 5 3.14 "uwu" { 
+hello world test 42 3.14 "uwu" 
-	meow: test 24
-	another: hi "hello",
-} "awa"