Parseur d'expression et affichage du résultat avec l'ASTPrinter.

src/rlox_interpreter.rs

@@ -1,6 +1,9 @@
 use std::{fs, io};
 use crate::EX_OK;
 use std::io::Write;
+use crate::astprinter::ASTPrinter;
+use crate::expr::ExprVisitor;
+use crate::parser::Parser;
 
 use crate::scanner::Scanner;
 
@@ -40,15 +43,15 @@ impl RLoxInterpreter {
 
     fn run(&self, src: String) -> i32 {
         let mut scanner = Scanner::new( src );
-
         scanner.scan_tokens();
-        let mut current_line = 0;
-        for t in scanner.tokens {
-            if t.line!=current_line {
-                current_line = t.line;
-                println!("-- line {} --------------------", current_line);
-            }
-            println!("{}\t{}\t{}", t.token_type, t.lexeme, t.literal);
+
+        let mut parser = Parser::new( scanner.tokens );
+        match parser.parse() {
+            Some(expr) => {
+                let printer = ASTPrinter;
+                printer.visit_expr(&expr);
+            },
+            None => println!("An error occurred while parsing expression.")
         }
 
         EX_OK