feat: migrate from OpView to DoubleLinkedList<Op*> + multiple

funciton arguments

include/parser/nodes.hpp

@@ -24,7 +24,7 @@ class Node
 public:
     virtual NodeType GetType() const = 0;
     virtual ~Node() {}
-}; 
+};
 
 class ExpressionNode : public Node
 {
@@ -144,20 +144,17 @@ class FnCallNode : public Node
 {
 public:
     // TODO: support multiple arguments
-    FnCallNode(const StringView& name, Node* arg)
-        : m_name(name), m_arg(arg) {}
-    ~FnCallNode() override {
-        delete m_arg;
-    }
+    FnCallNode(const StringView& name, View<Node*>&& arg)
+        : m_name(name), m_args(arg) {}
+    ~FnCallNode() override = default;
 
     NODE_TYPE(FnCall)
 public:
     const StringView& name() const { return m_name; }
-    // TODO: support multiple args
-    const Node* arg() const { return m_arg; }
+    const View<Node*>& args() const { return m_args; }
 private:
     StringView m_name;
-    Node* m_arg;
+    View<Node*> m_args;
 };
 
 class VariableNode : public Node
@@ -214,4 +211,4 @@ public:
 private:
     std::vector<FnDeclNode*> m_funcs;
     std::vector<ExternNode*> m_externs;
-};
+};