wip:

Add type system and refator for having only epression

src/main.rs

@@ -1,13 +1,12 @@
-mod backend;
-mod common;
-mod frontend;
-mod logging;
-mod middleend;
-
+pub mod backend;
+pub mod common;
+pub mod frontend;
+pub mod logging;
+pub mod middleend;
 use crate::{
     backend::interpreter::{EvaluateInterpreter, Interpreter},
     common::{
-        ast::{AstNode, Stmt},
+        ast::AstNode,
         lox_result::{LoxError, LoxResult},
     },
     frontend::{
@@ -175,7 +174,7 @@ impl LoxInterpreter {
     }
 
     // Funzione per parsare fino all'AST
-    fn parse_to_ast(&self, source_id: SourceId) -> LoxResult<Vec<AstNode<Stmt>>> {
+    fn parse_to_ast(&self, source_id: SourceId) -> LoxResult<Vec<AstNode>> {
         let tokens = self.tokenize(source_id)?;
 
         Parser::new(tokens).parse().or_else(|err| {
@@ -185,7 +184,7 @@ impl LoxInterpreter {
     }
 
     // Funzione per eseguire l'AST
-    fn execute_ast(&self, ast: Vec<AstNode<Stmt>>, debug: bool) -> LoxResult<String> {
+    fn execute_ast(&self, ast: Vec<AstNode>, debug: bool) -> LoxResult<String> {
         // Static resolution pass: compute variable scope distances and report
         // any resolution errors before executing.
         let locals = self.resolve(&ast)?;
@@ -212,7 +211,7 @@ impl LoxInterpreter {
     // Static variable resolution; prints and returns the first error, if any.
     fn resolve(
         &self,
-        ast: &[AstNode<Stmt>],
+        ast: &[AstNode],
     ) -> LoxResult<std::collections::HashMap<crate::common::ast::NodeId, usize>> {
         Resolver::resolve_program(ast).map_err(|errors| {
             for err in &errors {
@@ -295,7 +294,7 @@ fn format_tokens(tokens: &[crate::frontend::tokens::Token]) -> String {
         .join("\n")
 }
 
-fn format_ast(ast: &[AstNode<Stmt>]) -> String {
+fn format_ast(ast: &[AstNode]) -> String {
     use crate::logging::display_ast::{pretty_print_with_config, PrettyConfig};
 
     let config = PrettyConfig {