feat(ast): AST_END type implemented

src/utils/ast/ast_end.c

@@ -0,0 +1,16 @@
+#include "utils/ast/ast_end.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <stdbool.h>
+
+bool ast_is_end(struct ast *node)
+{
+    assert(node != NULL);
+    return node->type == AST_END;
+}
+
+struct ast *ast_create_end(end)
+{
+    return ast_create(AST_END, NULL);
+}

src/utils/ast/ast_end.h

@@ -0,0 +1,20 @@
+#ifndef AST_END_H
+#define AST_END_H
+
+#include <stdbool.h>
+
+#include "utils/lists/lists.h"
+#include "utils/ast/ast_base.h"
+
+/**
+ * Checks if the given AST node is of type AST_END.
+ */
+bool ast_is_end(struct ast *node);
+
+/**
+ * Creates a new AST node representing the end of input.
+ * WARNING: data will be a NULL pointer
+ */
+struct ast *ast_create_end(end);
+
+#endif /* ! AST_END_H */