Support COPY opcde

2025-06-30 23:58:54 +05:30
parent ad5f39db56
commit 5fe61462a2
2 changed files with 20 additions and 4 deletions
--- a/FastStack.h
+++ b/FastStack.h
@@ -32,11 +32,21 @@ public:
            m_stack[m_ptr--] = nullptr;
    }

-    PycRef<ASTNode> top() const
+    PycRef<ASTNode> top(int i = 1) const
    {
-        if (m_ptr > -1)
-            return m_stack[m_ptr];
-        else
+        if (i > 0) {
+            int idx = m_ptr + 1 - i;
+            if ((m_ptr > -1) && (idx >= 0))
+                return m_stack[idx];
+            else {
+                #ifdef BLOCK_DEBUG
+                    fprintf(stderr, "insufficient values on stack\n");
+                #endif
+                return nullptr;
+            }
+        }
+        else {
+            fprintf(stderr, "incorrect operand %i\n", i);
            return nullptr;
    }