27 namespace views = std::ranges::views;
33   using views::__adaptor::__adaptor_has_simple_extra_args;  in test01()
35   static_assert(__adaptor_has_simple_extra_args<decltype(views::transform), identity>);  in test01()
36   static_assert(__adaptor_has_simple_extra_args<decltype(views::filter), identity>);  in test01()
37   static_assert(__adaptor_has_simple_extra_args<decltype(views::drop), int>);  in test01()
38   static_assert(__adaptor_has_simple_extra_args<decltype(views::take), int>);  in test01()
39   static_assert(__adaptor_has_simple_extra_args<decltype(views::take_while), identity>);  in test01()
40   static_assert(__adaptor_has_simple_extra_args<decltype(views::drop_while), identity>);  in test01()
41   static_assert(__adaptor_has_simple_extra_args<decltype(views::lazy_split), std::string_view>);  in test01()
42   static_assert(__adaptor_has_simple_extra_args<decltype(views::lazy_split), char>);  in test01()
43   static_assert(!__adaptor_has_simple_extra_args<decltype(views::lazy_split), std::string>);  in test01()
45   using views::__adaptor::__closure_has_simple_call_op;  in test01()
46   __closure_has_simple_call_op auto a00 = views::all;  in test01()
47   __closure_has_simple_call_op auto a01 = views::transform(std::identity{});  in test01()
48   __closure_has_simple_call_op auto a02 = views::filter(std::identity{});  in test01()
49   __closure_has_simple_call_op auto a03 = views::drop(42);  in test01()
50   __closure_has_simple_call_op auto a04 = views::take(42);  in test01()
51   __closure_has_simple_call_op auto a05 = views::take_while(std::identity{});  in test01()
52   __closure_has_simple_call_op auto a06 = views::drop_while(std::identity{});  in test01()
53   __closure_has_simple_call_op auto a07 = views::join;  in test01()
54   __closure_has_simple_call_op auto a08 = views::common;  in test01()
55   __closure_has_simple_call_op auto a09 = views::reverse;  in test01()
56   __closure_has_simple_call_op auto a10 = views::keys;  in test01()
57   __closure_has_simple_call_op auto a11 = views::lazy_split(' ');  in test01()
58   __closure_has_simple_call_op auto a11a = views::split(' ');  in test01()
65   auto a12 = views::lazy_split(s);  in test01()
71   auto a12a = views::split(s);  in test01()
85   views::transform(badarg)(x); // { dg-error "no match" }  in test02()
86   views::filter(badarg)(x); // { dg-error "no match" }  in test02()
87   views::take_while(badarg)(x); // { dg-error "no match" }  in test02()
88   views::drop_while(badarg)(x); // { dg-error "no match" }  in test02()
90   (views::transform(badarg) | views::all)(x); // { dg-error "no match" }  in test02()
91   (views::filter(badarg) | views::all)(x); // { dg-error "no match" }  in test02()
92   (views::take_while(badarg) | views::all)(x); // { dg-error "no match" }  in test02()
93   (views::drop_while(badarg) | views::all)(x); // { dg-error "no match" }  in test02()
99   views::lazy_split(badarg)(x); // { dg-error "deleted function" }  in test02()
100   (views::lazy_split(badarg) | views::all)(x); // { dg-error "deleted function" }  in test02()
101   auto a0 = views::lazy_split(badarg);  in test02()
103   auto a1 = a0 | views::all;  in test02()
106   views::split(badarg)(x); // { dg-error "deleted function" }  in test02()
107   (views::split(badarg) | views::all)(x); // { dg-error "deleted function" }  in test02()
108   auto a0a = views::split(badarg);  in test02()
110   auto a1a = a0a | views::all;  in test02()
113   views::take(badarg)(x); // { dg-error "deleted" }  in test02()
114   views::drop(badarg)(x); // { dg-error "deleted" }  in test02()
115   (views::take(badarg) | views::all)(x); // { dg-error "deleted" }  in test02()
116   (views::drop(badarg) | views::all)(x); // { dg-error "deleted" }  in test02()
125   x | std::views::take(S{});  in test03()
126   x | std::views::drop(S{});  in test03()
135   using views::__adaptor::__closure_has_simple_call_op;  in test04()
136   static_assert(!__closure_has_simple_call_op<decltype(views::take_while(std::declval<F>()))>);  in test04()
137   static_assert(!__closure_has_simple_call_op<decltype(views::drop_while(std::declval<F>()))>);  in test04()
138   static_assert(!__closure_has_simple_call_op<decltype(views::filter(std::declval<F>()))>);  in test04()
139   static_assert(!__closure_has_simple_call_op<decltype(views::transform(std::declval<F>()))>);  in test04()