+
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
+b4_defines_if([
+m4_divert_push(0)dnl
+@output(b4_dir_prefix[]position.hh@)@
+b4_copyright([Positions for Bison parsers in C++])[
+
+/**
+ ** \file ]b4_dir_prefix[position.hh
+ ** Define the ]b4_namespace_ref[::position class.
+ */
+
+]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[
+
+# include <algorithm> // std::max
+# include <iosfwd>
+# include <string>
+
+]b4_null_define[
+
+]b4_namespace_open[
+]b4_position_define[