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Use the definitions from (newer) upstream PEGTL.

diff --git a/include/gemmi/cif.hpp b/include/gemmi/cif.hpp
index c7ffdb44..35d24210 100644
--- a/include/gemmi/cif.hpp
+++ b/include/gemmi/cif.hpp
@@ -37,7 +37,6 @@ namespace pegtl = tao::pegtl;
 namespace rules {
 
   template<int TableVal> struct lookup_char {
-    using analyze_t = pegtl::analysis::generic<pegtl::analysis::rule_type::ANY>;
     template<typename Input> static bool match(Input& in) {
       if (!in.empty() && cif::char_table(in.peek_char()) == TableVal) {
         if (TableVal == 2)  // this set includes new-line
@@ -71,11 +70,11 @@ namespace rules {
   struct ws_or_eof : pegtl::sor<whitespace, pegtl::eof> {};
 
   // (b) Reserved words.
-  struct str_data : TAOCPP_PEGTL_ISTRING("data_") {};
-  struct str_loop : TAOCPP_PEGTL_ISTRING("loop_") {};
-  struct str_global : TAOCPP_PEGTL_ISTRING("global_") {};
-  struct str_save : TAOCPP_PEGTL_ISTRING("save_") {};
-  struct str_stop : TAOCPP_PEGTL_ISTRING("stop_") {};
+  struct str_data : TAO_PEGTL_ISTRING("data_") {};
+  struct str_loop : TAO_PEGTL_ISTRING("loop_") {};
+  struct str_global : TAO_PEGTL_ISTRING("global_") {};
+  struct str_save : TAO_PEGTL_ISTRING("save_") {};
+  struct str_stop : TAO_PEGTL_ISTRING("stop_") {};
   struct keyword : pegtl::sor<str_data, str_loop, str_global,
                               str_save, str_stop> {};