removed waring (have remaind dead code for future feature)

README.org

@@ -10,6 +10,7 @@ end
 * Planning:
 allora quello che devo fare è:
 ** TODO Controllare se ho finito la questione del retourn:labe
+** TODO Complete the use os source slice inside parser (many node hase syntetic source slice or badly wrpapped)
 ** TODO implement struct:
 #+begin_src rlox
 Cosa :: struct{

examples/test_struct.lox

@@ -0,0 +1,27 @@
+
+Data :: struct {
+    number: Number,
+    string: String,
+    bool: Bool
+};
+
+Data.new :: fn(number: Number, string: String, bool: Bool) -> Self
+do
+    return Self {
+        number: number,
+        string: string,
+        bool: bool
+    };
+end;
+
+Data.function :: fn(
+   self,
+   number: Number,
+   string: String,
+   bool: Bool,)
+   {number == 42} : Nil
+do
+    self.number = number;
+    self.string = string;
+    self.bool = bool;
+end;

src/backend/interpreter.rs

@@ -3,7 +3,7 @@ use crate::{
     common::{
         ast::{AstNode, Expr, NodeId},
         base_value::{BaseValue, NativeFunction, Number, Truthy},
-        lox_result::{runtime_error, LoxError, LoxResult},
+        lox_result::{LoxError, LoxResult, runtime_error},
     },
     frontend::{source_registry::SourceSlice, tokens::TokenType},
 };
@@ -32,14 +32,14 @@ impl Interpreter {
         let mut env = EnvironmentStack::new();
         let _ = env.declare(
             "clock".to_string(),
-            BaseValue::NativeFunction(NativeFunction::new(Vec::default(), |_args| {
+            BaseValue::NativeFunction(Box::new(NativeFunction::new(Vec::default(), |_args| {
                 BaseValue::Number(Number::U128(
                     std::time::SystemTime::now()
                         .duration_since(std::time::UNIX_EPOCH)
                         .unwrap()
                         .as_millis(),
                 ))
-            })),
+            }))),
         );
         Self {
             enviorment: env,

src/common/base_value.rs

@@ -2,8 +2,9 @@ use core::fmt;
 use std::collections::HashMap;
 use std::fmt::Display;
 use std::ops::{Add, Div, Mul, Not, Rem, Sub};
+use std::ptr::fn_addr_eq;
 
-use crate::common::lox_result::{runtime_error, LoxResult};
+use crate::common::lox_result::{LoxResult, runtime_error};
 use crate::common::types::Type;
 use crate::{
     backend::environment::EnvironmentStack, common::ast::AstNode,
@@ -270,9 +271,9 @@ pub enum BaseValue {
     Number(Number),
     Boolean(bool),
     Nil,
-    Function(LoxFunction),
+    Function(Box<LoxFunction>),
-    NativeFunction(NativeFunction),
+    NativeFunction(Box<NativeFunction>),
-    Struct(Struct),
+    Struct(Box<Struct>),
 }
 
 struct Dict {
@@ -284,18 +285,12 @@ struct ReturnValue {
     value: Type,
 }
 
-impl ReturnValue {
-    pub fn new(label: Vec<String>, value: Type) -> Self {
-        Self { label, value }
-    }
-}
-
 impl BaseValue {
     pub fn is_callable(&self) -> bool {
-        match self {
+        matches!(
-            BaseValue::Function(..) | BaseValue::NativeFunction(..) => true,
+            self,
-            _ => false,
+            BaseValue::Function(..) | BaseValue::NativeFunction(..)
-        }
+        )
     }
 }
 
@@ -350,11 +345,16 @@ impl LoxFunction {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone)]
 pub struct NativeFunction {
     pub parameters: Vec<(String, Type)>,
     pub function: fn(&[BaseValue]) -> BaseValue,
 }
+impl PartialEq for NativeFunction {
+    fn eq(&self, other: &Self) -> bool {
+        self.parameters == other.parameters && fn_addr_eq(self.function, other.function)
+    }
+}
 
 impl NativeFunction {
     pub fn new(parameters: Vec<(String, Type)>, function: fn(&[BaseValue]) -> BaseValue) -> Self {
@@ -367,7 +367,7 @@ impl NativeFunction {
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct Struct {
-    pub fields: Vec<(String, BaseValue)>,
+    pub fields: Vec<(String, Type)>,
 }
 
 // Trait implementations for BaseValue

src/frontend/lexer.rs

@@ -1,5 +1,5 @@
 use crate::common::base_value::{BaseValue, Number};
-use crate::common::lox_result::{lexical_error, LoxError, LoxResult};
+use crate::common::lox_result::{LoxError, LoxResult, lexical_error};
 use crate::frontend::source_registry::{SourceId, SourcePosition, SourceSlice};
 use crate::frontend::tokens::{Token, TokenType};
 
@@ -102,7 +102,7 @@ impl Lexer {
             token_type,
             text,
             SourceSlice::from_positions(
-                self.source_id.clone(),
+                self.source_id,
                 self.start_pos.clone(),
                 self.end_pos.clone(),
             ),
@@ -115,7 +115,7 @@ impl Lexer {
             text,
             Some(literal),
             SourceSlice::from_positions(
-                self.source_id.clone(),
+                self.source_id,
                 self.start_pos.clone(),
                 self.end_pos.clone(),
             ),
@@ -174,7 +174,7 @@ impl Lexer {
                 if self.is_at_end() {
                     return lexical_error(
                         SourceSlice::from_positions(
-                            self.source_id.clone(),
+                            self.source_id,
                             self.start_pos.clone(),
                             self.end_pos.clone(),
                         ),
@@ -190,11 +190,11 @@ impl Lexer {
             (' ', _) | ('\r', _) | ('\t', _) => Ok(None),
             ('\n', _) => Ok(None),
             ('"', _) => self.string(),
-            (c, _) if c.is_digit(10) => self.number(),
+            (c, _) if c.is_ascii_digit() => self.number(),
             (c, _) if c.is_alphanumeric() || c == '_' => self.identifier(),
             _ => Err(LoxError::LexicalError {
                 source_slice: SourceSlice::from_positions(
-                    self.source_id.clone(),
+                    self.source_id,
                     self.start_pos.clone(),
                     self.end_pos.clone(),
                 ),
@@ -210,7 +210,7 @@ impl Lexer {
         if self.is_at_end() {
             return Err(LoxError::LexicalError {
                 source_slice: SourceSlice::from_positions(
-                    self.source_id.clone(),
+                    self.source_id,
                     self.start_pos.clone(),
                     self.end_pos.clone(),
                 ),
@@ -226,14 +226,14 @@ impl Lexer {
 
     fn number(&mut self) -> LoxResult<Option<Token>> {
         // Leggi la parte intera
-        while self.peek().is_digit(10) {
+        while self.peek().is_ascii_digit() {
             self.advance();
         }
 
         // Controlla se c'è una parte decimale
-        let has_decimal = if self.peek() == '.' && self.peek_next().is_digit(10) {
+        let has_decimal = if self.peek() == '.' && self.peek_next().is_ascii_digit() {
             self.advance(); // consuma il '.'
-            while self.peek().is_digit(10) {
+            while self.peek().is_ascii_digit() {
                 self.advance();
             }
             true

src/frontend/parser.rs

@@ -1,8 +1,8 @@
 use crate::{
     common::{
         ast::{AstNode, Expr},
-        base_value::{BaseValue, LoxFunction},
+        base_value::{BaseValue, LoxFunction, Struct},
-        lox_result::{parse_error, runtime_error, LoxResult},
+        lox_result::{LoxResult, parse_error, runtime_error},
         types::Type,
     },
     frontend::{
@@ -224,10 +224,31 @@ impl Parser {
     }
 
     fn struct_declaration(&mut self, start_slice: SourceSlice) -> LoxResult<AstNode> {
-        self.consume(TokenType::Struct, "Expect 'struct' after '::'")?;
         self.consume(TokenType::LeftBrace, "Expect '{' after 'struct'")?;
-
+        let mut fields: Vec<(String, Type)> = vec![];
-        todo!()
+        while self.peek().token_type != TokenType::RightBrace {
+            let field_name = self
+                .consume(TokenType::Identifier, "Expect identifier after '{'")?
+                .clone();
+            self.consume(TokenType::Colon, "Expect ':' after field name")?;
+            let field_type = self
+                .consume_type_name("Expect type name after ':'")?
+                .clone();
+            self.consume(TokenType::Comma, "Expect ',' after field type")?;
+            fields.push((field_name.lexeme, Type::Unresolved(field_type)));
+        }
+        let end_slice = self
+            .consume(TokenType::RightBrace, "Expect '}' after struct fields")?
+            .source_slice
+            .clone();
+        let source_slice = SourceSlice::from_source_slices(start_slice, end_slice);
+        Ok(AstNode::new_expression(
+            Expr::Literal {
+                value: Box::new(BaseValue::Struct(Box::new(Struct { fields }))),
+            },
+            source_slice,
+            "Struct".to_string(),
+        ))
     }
 
     fn function_declaration(&mut self, start_slice: SourceSlice) -> LoxResult<AstNode> {
@@ -269,13 +290,13 @@ impl Parser {
         let body = self.statement()?;
         Ok(AstNode::new_expression(
             Expr::Literal {
-                value: Box::new(BaseValue::Function(LoxFunction {
+                value: Box::new(BaseValue::Function(Box::new(LoxFunction {
                     parameters,
                     return_type: Type::Unresolved(return_type.clone()),
                     body,
                     closure: None,
                     guard,
-                })),
+                }))),
             },
             combine_position.clone(),
             return_type.clone(),
@@ -328,11 +349,7 @@ impl Parser {
             start_slice.start_position,
             end_slice.end_position,
         );
-        let label_str = if let Some(label) = label {
+        let label_str = label.unwrap_or_default();
-            label
-        } else {
-            String::default()
-        };
         Ok(AstNode::new_statement(
             Expr::Block {
                 statements: Box::new(statements),
@@ -351,7 +368,7 @@ impl Parser {
         let combined_slice = SourceSlice::from_source_slices(start_slice, end_slice);
         expr.is_statement = true;
         expr.source_slice = combined_slice;
-        return Ok(expr);
+        Ok(expr)
     }
 
     fn return_statement(&mut self, label: Option<String>) -> LoxResult<AstNode> {
@@ -374,11 +391,7 @@ impl Parser {
         let semicolon = self.consume(TokenType::Semicolon, "Expect ';' after return value.")?;
         let end_slice = semicolon.source_slice.clone();
         let combined_slice = SourceSlice::from_source_slices(start_slice, end_slice);
-        let label_str = if let Some(label) = label {
+        let label_str = label.unwrap_or_default();
-            label
-        } else {
-            String::default()
-        };
         Ok(AstNode::new_statement(
             Expr::Return {
                 expression: Box::new(expr),
@@ -396,7 +409,7 @@ impl Parser {
         let expr = self.or_and()?;
         if self.peek().token_type == TokenType::Equal {
             self.advance(); // consume '='
-                            // Right-associative: `a = b = c` parses as `a = (b = c)`.
+            // Right-associative: `a = b = c` parses as `a = (b = c)`.
             let value = self.assignment()?;
             let combined_slice = SourceSlice::from_positions(
                 expr.source_slice.source_id,
@@ -653,7 +666,7 @@ impl Parser {
         // Estendi il source_slice per includere le parentesi di chiusura
         let end_slice = self.previous().source_slice.end_position.clone();
         let full_slice = SourceSlice {
-            source_id: callee.source_slice.source_id.clone(),
+            source_id: callee.source_slice.source_id,
             start_position: start_slice.clone(),
             end_position: end_slice.clone(),
         };
@@ -779,7 +792,7 @@ impl Parser {
 
     fn peek(&self) -> &Token {
         if self.is_at_end() {
-            &self.tokens.last().unwrap()
+            self.tokens.last().unwrap()
         } else {
             &self.tokens[self.current]
         }
@@ -787,7 +800,7 @@ impl Parser {
 
     fn peek_next(&self) -> &Token {
         if self.is_at_end() {
-            &self.peek()
+            self.peek()
         } else {
             &self.tokens[self.current + 1]
         }
@@ -806,7 +819,7 @@ impl Parser {
             self.advance();
             Ok(self.previous())
         } else {
-            return parse_error(self.peek().source_slice.clone(), message);
+            parse_error(self.peek().source_slice.clone(), message)
         }
     }
 

src/frontend/source_registry.rs

@@ -4,7 +4,7 @@ use std::{
     io::ErrorKind,
 };
 
-use crate::common::lox_result::{io_error, LoxResult};
+use crate::common::lox_result::{LoxResult, io_error};
 
 pub struct SourceRegistry {
     pub sources: Vec<SourceFile>,
@@ -226,3 +226,9 @@ impl SourceRegistry {
         line_of_code
     }
 }
+
+impl Default for SourceRegistry {
+    fn default() -> Self {
+        Self::new()
+    }
+}

src/logging/display_ast.rs

@@ -117,7 +117,7 @@ impl PrettyContext {
     }
 
     fn should_truncate(&self) -> bool {
-        self.config.max_depth.map_or(false, |max| self.depth >= max)
+        self.config.max_depth.is_some_and(|max| self.depth >= max)
     }
 }
 

src/logging/display_token.rs

@@ -102,17 +102,17 @@ impl Token {
                 }
                 None => {
                     if config.colored {
-                        format!("{}", self.colored_type())
+                        self.colored_type().to_string()
                     } else {
-                        format!("{}", self.token_type_symbol())
+                        self.token_type_symbol().to_string()
                     }
                 }
             }
         } else {
             if config.colored {
-                format!("{}", self.colored_type())
+                self.colored_type().to_string()
             } else {
-                format!("{}", self.token_type_symbol())
+                self.token_type_symbol().to_string()
             }
         }
     }

src/main.rs

@@ -33,12 +33,10 @@ fn main() -> LoxResult<()> {
     println!("running {file_path:?}");
     let mut lox = LoxInterpreter::new(debug);
 
-    let res = match file_path {
+    match file_path {
         Some(path) => lox.run_file(&path, stage),
         None => lox.run_prompt(stage),
-    };
+    }
-
-    res
 }
 
 fn parse_args(args: &[String]) -> (ExecutionStage, Option<String>, bool) {
@@ -140,13 +138,12 @@ impl LoxInterpreter {
 
                     match self.source_registry.add_source_string(line.to_string()) {
                         Ok(source_id) => {
-                            match self.process_source(source_id, stage, self.debug) {
+                            if let Ok(result) = self.process_source(source_id, stage, self.debug) {
-                                Ok(result) => match stage {
+                                match stage {
                                     ExecutionStage::Tokens => println!("Tokens: {}", result),
                                     ExecutionStage::Ast => println!("AST: {}", result),
                                     ExecutionStage::Full => println!("Result: {}", result),
-                                },
+                                }
-                                Err(_) => {} // Errore già stampato in process_source
                             }
                         }
                         Err(e) => eprintln!("Error: {}", e),
@@ -167,9 +164,8 @@ impl LoxInterpreter {
         let source_content = self.source_registry.get_by_id(source_id).content.clone();
         let mut lexer = Lexer::new(source_content, source_id);
 
-        lexer.scans_tokens().or_else(|err| {
+        lexer.scans_tokens().inspect_err(|err| {
             err.print_with_context(&self.source_registry);
-            Err(err)
         })
     }
 
@@ -177,9 +173,8 @@ impl LoxInterpreter {
     fn parse_to_ast(&self, source_id: SourceId) -> LoxResult<Vec<AstNode>> {
         let tokens = self.tokenize(source_id)?;
 
-        Parser::new(tokens).parse().or_else(|err| {
+        Parser::new(tokens).parse().inspect_err(|err| {
             err.print_with_context(&self.source_registry);
-            Err(err)
         })
     }
 
@@ -196,9 +191,8 @@ impl LoxInterpreter {
             if debug {
                 println!("Executing statement {}: {:?}", index, stmt);
             }
-            result = Some(interpreter.evaluate(stmt.clone()).or_else(|err| {
+            result = Some(interpreter.evaluate(stmt.clone()).inspect_err(|err| {
                 err.print_with_context(&self.source_registry);
-                Err(err)
             })?);
         }
 
@@ -231,9 +225,8 @@ impl LoxInterpreter {
         let mut lexer = Lexer::new(source_content, source_id);
 
         // Stage 1: Tokenization
-        let tokens = lexer.scans_tokens().or_else(|err| {
+        let tokens = lexer.scans_tokens().inspect_err(|err| {
             err.print_with_context(&self.source_registry);
-            Err(err)
         })?;
 
         // Se debug è attivo, mostra sempre i tokens
@@ -247,9 +240,8 @@ impl LoxInterpreter {
         }
 
         // Stage 2: Parsing
-        let ast = Parser::new(tokens).parse().or_else(|err| {
+        let ast = Parser::new(tokens).parse().inspect_err(|err| {
             err.print_with_context(&self.source_registry);
-            Err(err)
         })?;
 
         // Se debug è attivo, mostra sempre l'AST
@@ -272,9 +264,8 @@ impl LoxInterpreter {
             if debug {
                 println!("Executing statement {}: {:?}", index, stmt);
             }
-            result = Some(interpreter.evaluate(stmt.clone()).or_else(|err| {
+            result = Some(interpreter.evaluate(stmt.clone()).inspect_err(|err| {
                 err.print_with_context(&self.source_registry);
-                Err(err)
             })?);
         }
 
@@ -295,7 +286,7 @@ fn format_tokens(tokens: &[crate::frontend::tokens::Token]) -> String {
 }
 
 fn format_ast(ast: &[AstNode]) -> String {
-    use crate::logging::display_ast::{pretty_print_with_config, PrettyConfig};
+    use crate::logging::display_ast::{PrettyConfig, pretty_print_with_config};
 
     let config = PrettyConfig {
         indent: "  ".to_string(),

src/middleend/scope_stack.rs

@@ -52,10 +52,10 @@ impl<T> ScopeStack<T> {
 
     /// Update an existing binding in the innermost scope (no-op if absent).
     pub fn set_local(&mut self, name: &str, state: T) {
-        if let Some(scope) = self.scopes.last_mut() {
+        if let Some(scope) = self.scopes.last_mut()
-            if let Some(slot) = scope.get_mut(name) {
+            && let Some(slot) = scope.get_mut(name)
-                *slot = state;
+        {
-            }
+            *slot = state;
         }
     }
 
@@ -68,7 +68,7 @@ impl<T> ScopeStack<T> {
     pub fn declared_in_current(&self, name: &str) -> bool {
         self.scopes
             .last()
-            .map_or(false, |scope| scope.contains_key(name))
+            .is_some_and(|scope| scope.contains_key(name))
     }
 
     /// Distance (in scopes) from the innermost scope to the one declaring