From 0707d0c7fabeb319933aaea1bb7aa5d68101ac47 Mon Sep 17 00:00:00 2001
From: Theophile Ranquet <ranquet@lrde.epita.fr>
Date: Fri, 4 Jan 2013 18:52:21 +0100
Subject: [PATCH] glr.cc: fatal if using api.token.ctor without variants

* data/glr.cc: Here.
---
 data/glr.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/data/glr.cc b/data/glr.cc
index 8b9bf02f..5f5a96f4 100644
--- a/data/glr.cc
+++ b/data/glr.cc
@@ -43,6 +43,12 @@
 #   user must initialize the first positions (in particular the
 #   filename member).
 
+b4_token_ctor_if([b4_variant_if([],
+  [b4_fatal_at(b4_percent_define_get_loc(api.token.constructor),
+               [cannot use '%s' without '%s'],
+               [%define api.token.constructor],
+               [%define api.value.type variant]))])])
+
 # We require a pure interface.
 m4_define([b4_pure_flag],      [1])
 
-- 
2.45.2