From 7a6f9df82f7acf7e180fca548bb629148c90ed57 Mon Sep 17 00:00:00 2001
From: Bob Polis <rpb.polis@avans.nl>
Date: Tue, 22 Sep 2020 13:41:23 +0200
Subject: [PATCH] more readable syntax error construction

---
 interpreter.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/interpreter.cpp b/interpreter.cpp
index 632f492..285f515 100644
--- a/interpreter.cpp
+++ b/interpreter.cpp
@@ -129,7 +129,8 @@ void interpreter::exec_instruction(const std::string& code, bool& done) {
     else if (code == "err") err();
     else {
         auto it = std::upper_bound(_pc_offsets.begin(), _pc_offsets.end(), _pc);
-        size_t lineno {it - _pc_offsets.begin() + _pc + 1};
+        long num_removed_source_lines {it - _pc_offsets.begin()};
+        size_t lineno {num_removed_source_lines + _pc + 1};
         throw syntax_error {code, lineno};
     }
 }