From ad276fffb31c77135d802db6f460e1e78aeef974 Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Fri, 4 Jul 2025 21:39:00 +1200
Subject: Raise error if an instruction name is redefined

---
 src/stages/semantic_tokens.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/stages/semantic_tokens.rs')

diff --git a/src/stages/semantic_tokens.rs b/src/stages/semantic_tokens.rs
index fc454be..c735828 100644
--- a/src/stages/semantic_tokens.rs
+++ b/src/stages/semantic_tokens.rs
@@ -49,6 +49,7 @@ pub enum SemanticToken {
 
 pub enum SemanticError {
     InvocationBeforeDefinition,
+    ReservedIdentifier(String),
 }
 
 
@@ -64,6 +65,8 @@ fn report_semantic_error(error: &Tracked<SemanticError>, source_code: &str) {
     let message = match &error.value {
         SemanticError::InvocationBeforeDefinition =>
             "Macro cannot be invoked before it has been defined",
+        SemanticError::ReservedIdentifier(name) =>
+            &format!("Identifier '{name}' is reserved for a built-in instruction"),
     };
     report_source_issue(LogLevel::Error, &context, message);
 }
-- 
cgit v1.2.3-70-g09d2