squawk_syntax: fix ast::BinExpr (#634)

also fix codegen formatting

Author: sbdchd

crates/squawk/src/main.rs

@@ -11,11 +11,11 @@ use squawk_linter::{Rule, Version};
 use structopt::clap::arg_enum;
 
 use crate::file_finding::find_paths;
-use std::io::IsTerminal;
 use config::Config;
 use log::info;
 use simplelog::CombinedLogger;
 use std::io;
+use std::io::IsTerminal;
 use std::panic;
 use std::path::PathBuf;
 use std::process::{self, ExitCode};

crates/squawk_syntax/src/ast/generated/nodes.rs

@@ -41,6 +41,16 @@ impl ast::Constraint {
     }
 }
 
+impl ast::BinExpr {
+    pub fn lhs(&self) -> Option<ast::Expr> {
+        support::children(self.syntax()).next()
+    }
+
+    pub fn rhs(&self) -> Option<ast::Expr> {
+        support::children(self.syntax()).nth(1)
+    }
+}
+
 impl ast::NameRef {
     #[inline]
     pub fn text(&self) -> TokenText<'_> {

crates/squawk_syntax/src/ast/node_ext.rs

@@ -51,7 +51,7 @@ fn ensure_rustfmt(sh: &Shell) {
 fn reformat(text: String) -> String {
     let sh = Shell::new().unwrap();
     ensure_rustfmt(&sh);
-    let mut stdout = cmd!(sh, "rustup run stable rustfmt")
+    let mut stdout = cmd!(sh, "rustup run stable rustfmt --edition=2024")
         .stdin(text)
         .read()
         .unwrap();
@@ -624,7 +624,7 @@ fn lower_rule(acc: &mut Vec<Field>, grammar: &Grammar, label: Option<&String>, r
         }
         Rule::Labeled { label: l, rule } => {
             assert!(label.is_none());
-            let manually_implemented = matches!(l.as_str(), "value");
+            let manually_implemented = matches!(l.as_str(), "value" | "lhs" | "rhs");
             if manually_implemented {
                 return;
             }