diff --git a/src/utils/ast/ast.c b/src/utils/ast/ast.c
index 60aecb2..ebdadd6 100644
--- a/src/utils/ast/ast.c
+++ b/src/utils/ast/ast.c
@@ -11,8 +11,9 @@ void ast_free(struct ast **node)
 {
     if (node == NULL || *node == NULL)
     {
-        perror("[WARNING] Internal error: failed to free AST node (NULL "
-               "argument)");
+        fprintf(stderr,
+                "[WARNING] Internal error: failed to free AST node (NULL "
+                "argument)\n");
         return;
     }
 
@@ -48,13 +49,17 @@ void ast_free(struct ast **node)
     case AST_LOOP:
         ast_free_loop(ast_get_loop(*node));
         break;
+    case AST_FUNCTION:
+        ast_free_function(ast_get_function(*node));
+        break;
     case AST_VOID:
     case AST_END:
         break;
 
     default:
-        perror("WARNING: Internal error: failed to free an AST node (Unknown "
-               "type)");
+        fprintf(stderr,
+                "WARNING: Internal error: failed to free an AST node (Unknown "
+                "type)");
         return;
     }
 
diff --git a/src/utils/ast/ast_base.h b/src/utils/ast/ast_base.h
index 71e4a38..e1c7b07 100644
--- a/src/utils/ast/ast_base.h
+++ b/src/utils/ast/ast_base.h
@@ -17,7 +17,8 @@ enum ast_type
     AST_PIPE,
     AST_NEG,
     AST_LOOP,
-    AST_ASSIGNMENT
+    AST_ASSIGNMENT,
+    AST_FUNCTION
 };
 
 struct ast
diff --git a/src/utils/ast/ast_function.c b/src/utils/ast/ast_function.c
new file mode 100644
index 0000000..edd53e0
--- /dev/null
+++ b/src/utils/ast/ast_function.c
@@ -0,0 +1,40 @@
+#include "ast_function.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ast_base.h"
+
+bool ast_is_function(struct ast *node)
+{
+    return node != NULL && node->type == AST_FUNCTION;
+}
+
+struct ast_function *ast_get_function(struct ast *node)
+{
+    if (!ast_is_function(node))
+        return NULL;
+    return (struct ast_function *)node->data;
+}
+
+struct ast *ast_create_function(char *name, struct ast *value)
+{
+    struct ast_function *function_data = malloc(sizeof(struct ast_function));
+    if (!function_data)
+        return NULL;
+
+    function_data->name = strdup(name);
+    function_data->value = value;
+
+    return ast_create(AST_FUNCTION, function_data);
+}
+
+void ast_free_function(struct ast_function *function_data)
+{
+    if (function_data)
+    {
+        free(function_data->name);
+        ast_free(&function_data->value);
+        free(function_data);
+    }
+}
diff --git a/src/utils/ast/ast_function.h b/src/utils/ast/ast_function.h
new file mode 100644
index 0000000..86e35cd
--- /dev/null
+++ b/src/utils/ast/ast_function.h
@@ -0,0 +1,33 @@
+#ifndef AST_FUNCTION_H
+#define AST_FUNCTION_H
+
+#include <stdbool.h>
+
+struct ast_function
+{
+    char *name;
+    struct ast *value;
+};
+
+
+/**
+ * Checks if the given AST node is an ast_function
+ */
+bool ast_is_function(struct ast *node);
+
+/**
+ * Retrieves the function data from the given AST node.
+ * Assumes that the node is of type AST_function.
+ */
+struct ast_function *ast_get_function(struct ast *node);
+
+/**
+ * Creates a new AST node representing an AST_function
+ */
+struct ast *ast_create_function(char *name, struct ast *value);
+/*
+ * @brief: frees the given ast_function and sets the pointer to NULL.
+ */
+void ast_free_function(struct ast_function *function_data);
+
+#endif /* AST_FUNCTION_H */