Improve ast.

Signed-off-by: James Goppert <james.goppert@gmail.com>

Author: jgoppert

Cargo.lock

@@ -13,6 +13,7 @@ rerun_except = "1.0.0"
 [dependencies]
 clap = { version = "4.5.20", features = ["derive"] }
 codespan-reporting = "0.11.1"
+indexmap = { version = "2.7.1", features = ["serde"] }
 lalrpop-util = "0.22.0"
 logos = "0.15.0"
 macro_rules_attribute = "0.2.0"

Cargo.toml

@@ -1,14 +1,12 @@
 use std::process::Command;
 
 fn main() {
-    println!("cargo:rerun-if-changed=src/s0_lexer/lexer.rs");
-    println!("cargo:rerun-if-changed=src/s0_lexer/mod.rs");
-    println!("cargo:rerun-if-changed=src/s0_lexer/token.rs");
-    println!("cargo:rerun-if-changed=src/s1_parser/modelica.lalrpop");
-    println!("cargo:rerun-if-changed=src/s1_parser/ast.rs");
-    println!("cargo:rerun-if-changed=src/s1_parser/mod.rs");
-    println!("cargo:rerun-if-changed=src/s1_parser/parser_helper.rs");
-    lalrpop::process_root().unwrap();
+    println!("cargo:rerun-if-changed=src/s0_lexer");
+    println!("cargo:rerun-if-changed=src/s1_parser");
+    lalrpop::Configuration::new()
+        .emit_rerun_directives(true)
+        .process_current_dir()
+        .unwrap();
 
     // Attempt to retrieve the current Git version
     let output = Command::new("git")