From bf80781f719f2d76ac7882eef9f1aa9e41f0ecfb Mon Sep 17 00:00:00 2001
From: YannAhlgrim <yann@ahlgrim.net>
Date: Wed, 3 Jun 2026 16:50:41 +0200
Subject: [PATCH] print out error message and add peek error

---
 src/parser/mod.rs | 5 +++--
 src/repl/mod.rs   | 6 +++++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 23b1346..749f06a 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -117,7 +117,7 @@ impl Parser {
         self.peek_token = self.lexer.next_token();
     }
 
-    fn parse_program(&mut self) -> ast::Program {
+    pub fn parse_program(&mut self) -> ast::Program {
         let mut program = ast::Program {
             statements: Vec::new(),
         };
@@ -151,6 +151,7 @@ impl Parser {
             self.next_token();
             true
         } else {
+            self.peek_error(t);
             false
         }
     }
@@ -439,7 +440,7 @@ impl Parser {
         Some(args)
     }
 
-    fn errors(&self) -> &Vec<String> {
+    pub fn errors(&self) -> &Vec<String> {
         &self.errors
     }
 
diff --git a/src/repl/mod.rs b/src/repl/mod.rs
index 3bb7b54..e3eb801 100644
--- a/src/repl/mod.rs
+++ b/src/repl/mod.rs
@@ -1,7 +1,6 @@
 use crate::ast::NodeTrait;
 use crate::lexer::new;
 use crate::parser::Parser;
-use crate::parser::ParserTrait;
 use crate::parser::new_parser;
 
 const PROMPT: &str = ">> ";
@@ -21,6 +20,11 @@ pub fn start_repl() {
         let lexer = new(input.to_string());
         let mut parser: Parser = new_parser(lexer);
         let program = parser.parse_program();
+
+        for err in parser.errors() {
+            eprintln!("ERROR: {}", err);
+        }
+
         println!("{}", program.string());
     }
 }