1 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // Example from C++ Standard Working Draft N4842, November 2019 Mailing
19 // Adapted for testing.
21 // { dg-do compile { target c++20 } }
23 #include <source_location>
24 #include <string_view>
27 std::source_location member
= std::source_location::current();
30 constexpr s(std::source_location loc
= std::source_location::current())
31 : member(loc
) // values of member refer to calling function
34 constexpr s(int blather
) : // values of member refer to this location
39 constexpr std::source_location
40 f(std::source_location a
= std::source_location::current())
46 struct srcloc_and_line
48 std::source_location sl
;
52 std::source_location c
= std::source_location::current();
53 return srcloc_and_line
{ f(c
), __LINE__
- 1 };
60 constexpr std::source_location main_sl
= std::source_location::current();
61 constexpr unsigned main_sl_line
= __LINE__
- 1;
62 constexpr std::source_location f_arg_sl
= f(main_sl
);
63 constexpr unsigned f_arg_sl_line
= main_sl_line
;
64 constexpr std::source_location g_sl
= g().sl
;
65 constexpr unsigned g_sl_line
= g().line
;
66 constexpr std::source_location f_sl
= f();
67 constexpr unsigned f_sl_line
= __LINE__
- 1;
68 constexpr std::source_location h_sl
= h(); // defined in ./srcloc.h
69 constexpr s
member_main_sl(main_sl
);
70 constexpr s
member_defaulted_sl(1);
71 constexpr s member_sl
= s
{};
72 constexpr unsigned member_sl_line
= __LINE__
- 1;
74 using namespace std::string_view_literals
;
76 static_assert (std::source_location::current ().line () == __LINE__
);
77 static_assert (std::source_location::current ().column () == 48);
80 constexpr std::string_view
main_sl_fn_name(main_sl
.function_name());
81 constexpr std::string_view
main_sl_fi_name(main_sl
.file_name());
82 static_assert(main_sl
.line() == main_sl_line
);
83 // opening paren of call
84 static_assert(main_sl
.column() == 73);
85 static_assert(main_sl_fn_name
.ends_with("main()"sv
));
86 static_assert(main_sl_fi_name
.ends_with("consteval.cc"sv
));
88 constexpr std::string_view
f_arg_sl_fn_name(f_arg_sl
.function_name());
89 constexpr std::string_view
f_arg_sl_fi_name(f_arg_sl
.file_name());
90 static_assert(f_arg_sl
.line() == f_arg_sl_line
);
91 // opening paren of call
92 static_assert(f_arg_sl
.column() == 73);
93 static_assert(f_arg_sl_fn_name
.ends_with("main()"sv
));
94 static_assert(f_arg_sl_fi_name
.ends_with("consteval.cc"sv
));
96 constexpr std::string_view
g_sl_fn_name(g_sl
.function_name());
97 constexpr std::string_view
g_sl_fi_name(g_sl
.file_name());
98 static_assert(g_sl
.line() == g_sl_line
);
99 static_assert(g_sl
.column() == 57); // opening paren of call
100 static_assert(g_sl_fn_name
.ends_with("g()"sv
));
101 static_assert(g_sl_fi_name
.ends_with("consteval.cc"sv
));
103 constexpr std::string_view
h_sl_fn_name(h_sl
.function_name());
104 constexpr std::string_view
h_sl_fi_name(h_sl
.file_name());
105 static_assert(h_sl
.line() == 23);
106 static_assert(h_sl
.column() == 57); // opening paren of call
107 static_assert(h_sl_fn_name
.ends_with("h()"sv
));
108 static_assert(h_sl_fi_name
.ends_with("srcloc.h"sv
));
110 constexpr std::string_view
member_main_sl_fn_name(member_main_sl
.member
.function_name());
111 constexpr std::string_view
member_main_sl_fi_name(member_main_sl
.member
.file_name());
112 static_assert(member_main_sl
.member
.line() == main_sl_line
);
113 static_assert(member_main_sl
.member
.column() == 73);
114 static_assert(member_main_sl_fn_name
.ends_with("main()"sv
));
115 static_assert(member_main_sl_fi_name
.ends_with("consteval.cc"sv
));
117 constexpr std::string_view
member_defaulted_sl_fi_name(
118 member_defaulted_sl
.member
.file_name());
119 constexpr std::string_view
member_defaulted_sl_fn_name(
120 member_defaulted_sl
.member
.function_name());
121 static_assert(member_defaulted_sl
.member
.line() == 35);
122 // closing paren of constructor declaration
123 static_assert(member_defaulted_sl
.member
.column() == 25);
124 static_assert(member_defaulted_sl_fn_name
.ends_with("s::s(int)"sv
));
125 static_assert(member_defaulted_sl_fi_name
.ends_with("consteval.cc"sv
));
127 constexpr std::string_view
member_sl_fi_name(
128 member_sl
.member
.file_name());
129 constexpr std::string_view
member_sl_fn_name(
130 member_sl
.member
.function_name());
131 static_assert(member_sl
.member
.line() == member_sl_line
);
132 // closing brace/paren of constructor
133 static_assert(member_sl
.member
.column() == 29);
134 static_assert(member_sl_fn_name
.starts_with("int main()"sv
));
135 static_assert(member_sl_fi_name
.ends_with("consteval.cc"sv
));
137 constexpr std::string_view
f_sl_fi_name(f_sl
.file_name());
138 constexpr std::string_view
f_sl_fn_name(f_sl
.function_name());
139 static_assert(f_sl
.line() == f_sl_line
);
140 // opening paren of call
141 static_assert(f_sl
.column() == 42);
142 static_assert(f_sl_fn_name
.ends_with("main()"sv
));
143 static_assert(f_sl_fi_name
.ends_with("consteval.cc"sv
));