27   constexpr std::optional<int> operator()(int&) { return 1; }  in operator ()()
28   std::optional<int> operator()(const int&) = delete;
29   std::optional<int> operator()(int&&) = delete;
30   std::optional<int> operator()(const int&&) = delete;
34   std::optional<int> operator()(int&) = delete;
35   constexpr std::optional<int> operator()(const int&) { return 1; }  in operator ()()
36   std::optional<int> operator()(int&&) = delete;
37   std::optional<int> operator()(const int&&) = delete;
41   std::optional<int> operator()(int&) = delete;
42   std::optional<int> operator()(const int&) = delete;
43   constexpr std::optional<int> operator()(int&&) { return 1; }  in operator ()()
44   std::optional<int> operator()(const int&&) = delete;
48   std::optional<int> operator()(int&) = delete;
49   std::optional<int> operator()(const int&) = delete;
50   std::optional<int> operator()(int&&) = delete;
51   constexpr std::optional<int> operator()(const int&&) { return 1; }  in operator ()()
55   constexpr std::optional<int> operator()(int) & { return 1; }  in operator ()()
56   std::optional<int> operator()(int) const& = delete;
57   std::optional<int> operator()(int) && = delete;
58   std::optional<int> operator()(int) const&& = delete;
62   std::optional<int> operator()(int) & = delete;
63   constexpr std::optional<int> operator()(int) const& { return 1; }  in operator ()()
64   std::optional<int> operator()(int) && = delete;
65   std::optional<int> operator()(int) const&& = delete;
69   std::optional<int> operator()(int) & = delete;
70   std::optional<int> operator()(int) const& = delete;
71   constexpr std::optional<int> operator()(int) && { return 1; }  in operator ()()
72   std::optional<int> operator()(int) const&& = delete;
76   std::optional<int> operator()(int) & = delete;
77   std::optional<int> operator()(int) const& = delete;
78   std::optional<int> operator()(int) && = delete;
79   constexpr std::optional<int> operator()(int) const&& { return 1; }  in operator ()()
83   constexpr std::optional<int> operator()(int&) { return std::nullopt; }  in operator ()()
84   std::optional<int> operator()(const int&) = delete;
85   std::optional<int> operator()(int&&) = delete;
86   std::optional<int> operator()(const int&&) = delete;
90   std::optional<int> operator()(int&) = delete;
91   constexpr std::optional<int> operator()(const int&) { return std::nullopt; }  in operator ()()
92   std::optional<int> operator()(int&&) = delete;
93   std::optional<int> operator()(const int&&) = delete;
97   std::optional<int> operator()(int&) = delete;
98   std::optional<int> operator()(const int&) = delete;
99   constexpr std::optional<int> operator()(int&&) { return std::nullopt; }  in operator ()()
100   std::optional<int> operator()(const int&&) = delete;
104   std::optional<int> operator()(int&) = delete;
105   std::optional<int> operator()(const int&) = delete;
106   std::optional<int> operator()(int&&) = delete;
107   constexpr std::optional<int> operator()(const int&&) { return std::nullopt; }  in operator ()()
111   constexpr std::optional<int> operator()(int) & { return std::nullopt; }  in operator ()()
112   std::optional<int> operator()(int) const& = delete;
113   std::optional<int> operator()(int) && = delete;
114   std::optional<int> operator()(int) const&& = delete;
118   std::optional<int> operator()(int) & = delete;
119   constexpr std::optional<int> operator()(int) const& { return std::nullopt; }  in operator ()()
120   std::optional<int> operator()(int) && = delete;
121   std::optional<int> operator()(int) const&& = delete;
125   std::optional<int> operator()(int) & = delete;
126   std::optional<int> operator()(int) const& = delete;
127   constexpr std::optional<int> operator()(int) && { return std::nullopt; }  in operator ()()
128   std::optional<int> operator()(int) const&& = delete;
132   std::optional<int> operator()(int) & = delete;
133   std::optional<int> operator()(int) const& = delete;
134   std::optional<int> operator()(int) && = delete;
135   constexpr std::optional<int> operator()(int) const&& { return std::nullopt; }  in operator ()()
141   std::optional<int> operator()(const NoCopy&&) { return 1; }  in operator ()()
145   std::optional<int> non_const() { return 1; }  in non_const()
153       std::optional<int> i{0};  in test_val_types()
156       ASSERT_SAME_TYPE(decltype(i.and_then(LVal{})), std::optional<int>);  in test_val_types()
161       std::optional<int> i{0};  in test_val_types()
166       ASSERT_SAME_TYPE(decltype(i.and_then(l)), std::optional<int>);  in test_val_types()
174       const std::optional<int> i{0};  in test_val_types()
177       ASSERT_SAME_TYPE(decltype(i.and_then(CLVal{})), std::optional<int>);  in test_val_types()
182       const std::optional<int> i{0};  in test_val_types()
187       ASSERT_SAME_TYPE(decltype(i.and_then(l)), std::optional<int>);  in test_val_types()
195       std::optional<int> i{0};  in test_val_types()
198       ASSERT_SAME_TYPE(decltype(std::move(i).and_then(RVal{})), std::optional<int>);  in test_val_types()
203       std::optional<int> i{0};  in test_val_types()
206       ASSERT_SAME_TYPE(decltype(i.and_then(RVRefQual{})), std::optional<int>);  in test_val_types()
214       const std::optional<int> i{0};  in test_val_types()
217       ASSERT_SAME_TYPE(decltype(std::move(i).and_then(CRVal{})), std::optional<int>);  in test_val_types()
222       const std::optional<int> i{0};  in test_val_types()
227       ASSERT_SAME_TYPE(decltype(i.and_then(std::move(l))), std::optional<int>);  in test_val_types()
234   std::optional<NonConst> opt{};  in test_sfinae()
242   std::optional<int> opt{};  in test()
247     return std::optional<int>{};  in test()
255   std::optional<NoCopy> nc;  in test()