1 files changed, 14 insertions, 0 deletions
diff --git a/ast.c b/ast.c
index 7d65db564e..b7416ad203 100644
--- a/ast.c
+++ b/ast.c
@@ -245,6 +245,17 @@ ast_node_type(rb_execution_context_t *ec, VALUE self)
     return rb_sym_intern_ascii_cstr(node_type_to_str(data->node));
 }
 
+#ifdef EXPERIMENTAL_ISEQ_NODE_ID
+static VALUE
+ast_node_node_id(VALUE self)
+{
+    struct ASTNodeData *data;
+    TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
+
+    return INT2FIX(nd_node_id(data->node));
+}
+#endif
+
 #define NEW_CHILD(ast, node) node ? ast_new_internal(ast, node) : Qnil
 
 static VALUE
@@ -695,4 +706,7 @@ Init_ast(void)
     rb_mAST = rb_define_module_under(rb_cRubyVM, "AbstractSyntaxTree");
     rb_cNode = rb_define_class_under(rb_mAST, "Node", rb_cObject);
     rb_undef_alloc_func(rb_cNode);
+#ifdef EXPERIMENTAL_ISEQ_NODE_ID
+    rb_define_method(rb_cNode, "node_id", ast_node_node_id, 0);
+#endif
 }