From ebbc675ffd4704085641c1f2bec3129caa2bb8cd Mon Sep 17 00:00:00 2001
From: Nilstrieb <48135649+Nilstrieb@users.noreply.github.com>
Date: Wed, 29 Dec 2021 17:11:01 +0100
Subject: [PATCH] more work

---
 src/compile.rs | 28 +++++++++++++++++++++++-----
 test.sl        |  4 +++-
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/src/compile.rs b/src/compile.rs
index db68f80..de042a2 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -187,12 +187,16 @@ impl Compiler {
 
     fn lookup_local(&self, name: &Ident) -> CResult<usize> {
         for locals in self.locals.iter().rev() {
+            dbg!("searching");
             if let Some(&position) = locals.get(name) {
                 return Ok(position);
             }
         }
 
-        Err(CompileError)
+        Err(CompileError::new(
+            name.span,
+            format!("variable {} not found", name.sym),
+        ))
     }
 
     fn current_stack_top(&self) -> usize {
@@ -221,18 +225,32 @@ enum StackChange {
 }
 
 #[derive(Debug)]
-pub struct CompileError;
+pub struct CompileError {
+    span: Span,
+    message: String,
+    note: Option<String>,
+}
+
+impl CompileError {
+    fn new(span: Span, message: String) -> Self {
+        Self {
+            span,
+            message,
+            note: None,
+        }
+    }
+}
 
 impl CompilerError for CompileError {
     fn span(&self) -> Span {
-        todo!()
+        self.span
     }
 
     fn message(&self) -> String {
-        todo!()
+        self.message.clone()
     }
 
     fn note(&self) -> Option<String> {
-        todo!()
+        self.note.clone()
     }
 }
diff --git a/test.sl b/test.sl
index 8e8a2ae..8ac0832 100644
--- a/test.sl
+++ b/test.sl
@@ -1 +1,3 @@
-let x = 2 * 3;
\ No newline at end of file
+let x = 2 * 3;
+
+let tz = x * 5;
\ No newline at end of file