1133     isl::boolean BoolResult = TestSet1.is_empty();  in TEST()  local
1134     EXPECT_TRUE(BoolResult.is_error());  in TEST()
1135     EXPECT_FALSE(BoolResult.is_false());  in TEST()
1136     EXPECT_FALSE(BoolResult.is_true());  in TEST()
1137     EXPECT_DEATH((void)(bool)BoolResult,  in TEST()
1139     EXPECT_DEATH((void)(bool)!BoolResult,  in TEST()
1143           if (BoolResult) {  in TEST()
1147     EXPECT_DEATH((void)(BoolResult == false),  in TEST()
1149     EXPECT_DEATH((void)(BoolResult == true),  in TEST()
1167     isl::boolean BoolResult = TestSet1.is_empty();  in TEST()  local
1168     EXPECT_FALSE(BoolResult.is_error());  in TEST()
1169     EXPECT_TRUE(BoolResult.is_false());  in TEST()
1170     EXPECT_FALSE(BoolResult.is_true());  in TEST()
1171     EXPECT_FALSE(BoolResult);  in TEST()
1172     EXPECT_TRUE(!BoolResult);  in TEST()