[PATCH 1/4] style: add missing copyright headers

[Akim Demaille]

* examples/c++/glr/ast.hh, examples/c++/glr/c++-types.yy: here.
---
 examples/c++/glr/ast.hh       | 17 +++++++++++++++++
 examples/c++/glr/c++-types.yy | 20 +++++++++++++++++++-
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/examples/c++/glr/ast.hh b/examples/c++/glr/ast.hh
index 20fab2c5..223fc119 100644
--- a/examples/c++/glr/ast.hh
+++ b/examples/c++/glr/ast.hh
@@ -1,3 +1,20 @@
+/*
+  Copyright (C) 2020 Free Software Foundation, Inc.
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include <iostream>
 
 #if __cplusplus < 201103L
diff --git a/examples/c++/glr/c++-types.yy b/examples/c++/glr/c++-types.yy
index 1ed5ee09..53262c25 100644
--- a/examples/c++/glr/c++-types.yy
+++ b/examples/c++/glr/c++-types.yy
@@ -1,4 +1,22 @@
-/* Simplified -*- C++ -*- Type and Expression Grammar.  */
+/*                                                       -*- C++ -*-
+  Copyright (C) 2020 Free Software Foundation, Inc.
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Simplified C++ Type and Expression Grammar.
+   Written by Paul Hilfinger for Bison's test suite.  */
 
 %glr-parser
 %skeleton "glr2.cc"
-- 
2.29.2