glib GVariant 3

GVariant *value1, *value2, *value3, *value4;

value1 = g_variant_new ("y", 200);
value2 = g_variant_new ("b", TRUE);
value3 = g_variant_new ("d", 37.5);
value4 = g_variant_new ("x", G_GINT64_CONSTANT (998877665544332211));

 
  gdouble floating;
  gboolean truth;
  gint64 bignum;


  g_variant_get (value1, "y", NULL);      /* ignore the value. */
  g_variant_get (value2, "b", &truth);
  g_variant_get (value3, "d", &floating);
  g_variant_get (value4, "x", &bignum);
  g_message ("%d, %f, %d", truth, floating, bignum);