* src/ltlvisit/equals.cc, src/ltlvisit/equals.hh: New files.

* src/ltlvisit/Makefile.am (libltlvisit_a_SOURCES): Add equals.hh
and equals.cc.
* src/ltltest/equals.cc, src/ltltest/equals.test: New files.
* src/ltltest/Makefile.am (check_PROGRAMS): Add equals.
(equals_SOURCES): New variable.
(TESTS): Add equals.test.

src/ltltest/equals.cc

@@ -0,0 +1,59 @@
+#include <iostream>
+#include "ltlparse/public.hh"
+#include "ltlvisit/equals.hh"
+
+void
+syntax(char *prog)
+{
+  std::cerr << prog << " formulae1 formulae2" << std::endl;
+  exit(2);
+}
+
+bool 
+print_parse_error(const char* f, spot::ltl::parse_error_list& pel)
+{
+  bool err = false;
+
+  spot::ltl::parse_error_list::iterator it;
+  for (it = pel.begin(); it != pel.end(); ++it)
+    {
+      std::cerr << ">>> " << f << std::endl;
+      unsigned n = 0;
+      yy::Location& l = it->first;
+      for (; n < 4 + l.begin.column; ++n)
+	std::cerr << ' ';
+      // Write at least one '^', even if begin==end.
+      std::cerr << '^';
+      ++n;
+      for (; n < 4 + l.end.column; ++n)
+	std::cerr << '^';
+      std::cerr << std::endl << it->second << std::endl << std::endl;
+      err = true;
+    }
+  return err;
+}
+
+int
+main(int argc, char **argv)
+{
+  if (argc != 3)
+    syntax(argv[0]);
+
+  
+  spot::ltl::parse_error_list p1;
+  spot::ltl::formulae *f1 = spot::ltl::parse(argv[1], p1);
+
+  if (print_parse_error(argv[1], p1))
+    return 2;
+
+  spot::ltl::parse_error_list p2;
+  spot::ltl::formulae *f2 = spot::ltl::parse(argv[2], p2);
+			
+  if (print_parse_error(argv[2], p2))
+    return 2;
+
+  if (equals(f1, f2))
+    return 0;
+  return 1;
+
+}