* configure.ac: Output src/tgbaparse/Makefile.

* src/Makefile.am (SUBDIRS): Add tgbaparse.
(libspot_la_LDADD): Add tgbaparse/libtgbaparse.la.
* src/tgba/tgbaexplicit.cc (tgba_explicit::get_condition,
tgba_explicit::get_promise, tgba_explicit::add_neg_condition,
tgba_explicit::add_neg_promise): New methods.
* src/tgba/tgbaexplicit.hh: Declare them.
* src/tgbaparse/Makefile.am, src/tgbaparse/fmterror.cc,
src/tgbaparse/parsedecl.hh, src/tgbaparse/public.hh,
src/tgbaparse/tgbaparse.yy, src/tgbaparse/tgbascan.ll,
src/tgbatest/tgbaread.cc, src/tgbatest/tgbaread.test: New files.
* src/tgbatest/Makefile.am (check_PROGRAMS): Add tgbaread.
(TESTS): Add tgbaread.cc.
(CLEANFILES): Add input.
(tgbaread_SOURCES): New variable.

src/tgbaparse/parsedecl.hh

@@ -0,0 +1,32 @@
+#ifndef SPOT_TGBAPARSE_PARSEDECL_HH
+# define SPOT_TGBAPARSE_PARSEDECL_HH
+
+#include <string>
+#include "tgbaparse.hh"
+#include "location.hh"
+
+# define YY_DECL \
+  int tgbayylex (yystype *yylval, yy::Location *yylloc)
+YY_DECL;
+
+namespace spot
+{
+  int tgbayyopen(const std::string& name);
+  void tgbayyclose();
+}
+
+
+// Gross kludge to compile yy::Parser in another namespace (tgbayy::)
+// but still use yy::Location.  The reason is that Bison's C++
+// skeleton does not support anything close to %name-prefix at the
+// moment.  All parser are named yy::Parser which makes it somewhat
+// difficult to define multiple parsers.
+namespace tgbayy
+{
+  using namespace yy;
+}
+#define yy tgbayy
+
+
+
+#endif // SPOT_TGBAPARSE_PARSEDECL_HH