libstdc++-v3/testsuite/18_support/source_location/1.cc

   1 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   2 //
   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)
   7 // any later version.
   8
   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.
  13
  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/>.
  17
  18 // Example from C++ Standard Working Draft N4842, November 2019 Mailing
  19 // Adapted for testing.
  20
  21 // { dg-options "-std=gnu++2a -include string -include stdexcept" }
  22 // { dg-do run { target c++2a } }
  23
  24 #include <source_location>
  25
  26 #ifndef __cpp_lib_source_location
  27 # error "Feature-test macro for source_location missing in <source_location>"
  28 #elif __cpp_lib_source_location != 201907L
  29 # error "Feature-test macro for source_location has wrong value in <source_location>"
  30 #endif
  31
  32 #include <string_view>
  33 #include <testsuite_hooks.h>
  34 #include "srcloc.h"
  35
  36
  37 struct s {
  38   std::source_location member = std::source_location::current();
  39   int other_member = 1;
  40
  41   s(std::source_location loc = std::source_location::current())
  42     : member(loc) // values of member refer to calling function
  43   { }
  44
  45   s(int blather) : // values of member refer to this location
  46     other_member(blather)
  47   { }
  48 };
  49
  50 std::source_location
  51 f(std::source_location a = std::source_location::current());
  52
  53 std::source_location
  54 f(std::source_location a)
  55 { return a; }
  56
  57 auto
  58 g()
  59 {
  60   struct srcloc_and_line
  61   {
  62     std::source_location sl;
  63     unsigned line;
  64   };
  65
  66   std::source_location c = std::source_location::current();
  67   return srcloc_and_line{ f(c), __LINE__ - 1 };
  68 }
  69
  70 int main ()
  71 {
  72   std::source_location main_sl = std::source_location::current();
  73   unsigned main_sl_line = __LINE__ - 1;
  74   std::source_location f_arg_sl = f(main_sl);
  75   unsigned f_arg_sl_line = main_sl_line;
  76   auto [g_sl, g_sl_line] = g();
  77   std::source_location f_sl = f();
  78   unsigned f_sl_line = __LINE__ - 1;
  79   std::source_location h_sl = h(); // defined in ./srcloc.h
  80   s member_main_sl(main_sl);
  81   s member_defaulted_sl(1);
  82   s member_sl = s{};
  83   const unsigned member_sl_line = __LINE__ - 1;
  84
  85   using namespace std::string_view_literals;
  86
  87   std::string_view main_sl_fn_name(main_sl.function_name());
  88   std::string_view main_sl_fi_name(main_sl.file_name());
  89   VERIFY(main_sl.line() == main_sl_line);
  90   // opening paren of call
  91   VERIFY(main_sl.column() == 63);
  92   VERIFY(main_sl_fn_name.ends_with("main()"sv));
  93   VERIFY(main_sl_fi_name.ends_with("1.cc"sv));
  94
  95   std::string_view f_arg_sl_fn_name(f_arg_sl.function_name());
  96   std::string_view f_arg_sl_fi_name(f_arg_sl.file_name());
  97   VERIFY(f_arg_sl.line() == f_arg_sl_line);
  98   // opening paren of call
  99   VERIFY(f_arg_sl.column() == 63);
 100   VERIFY(f_arg_sl_fn_name.ends_with("main()"sv));
 101   VERIFY(f_arg_sl_fi_name.ends_with("1.cc"sv));
 102
 103   std::string_view g_sl_fn_name(g_sl.function_name());
 104   std::string_view g_sl_fi_name(g_sl.file_name());
 105   VERIFY(g_sl.line() == g_sl_line);
 106   VERIFY(g_sl.column() == 57); // opening paren of call
 107   VERIFY(g_sl_fn_name.ends_with("g()"sv));
 108   VERIFY(g_sl_fi_name.ends_with("1.cc"sv));
 109
 110   std::string_view h_sl_fn_name(h_sl.function_name());
 111   std::string_view h_sl_fi_name(h_sl.file_name());
 112   VERIFY(h_sl.line() == 23);
 113   VERIFY(h_sl.column() == 57); // opening paren of call
 114   VERIFY(h_sl_fn_name.ends_with("h()"sv));
 115   VERIFY(h_sl_fi_name.ends_with("srcloc.h"sv));
 116
 117   std::string_view member_main_sl_fn_name(member_main_sl.member.function_name());
 118   std::string_view member_main_sl_fi_name(member_main_sl.member.file_name());
 119   VERIFY(member_main_sl.member.line() == main_sl_line);
 120   VERIFY(member_main_sl.member.column() == 63);
 121   VERIFY(member_main_sl_fn_name.ends_with("main()"sv));
 122   VERIFY(member_main_sl_fi_name.ends_with("1.cc"sv));
 123
 124   std::string_view member_defaulted_sl_fi_name(
 125     member_defaulted_sl.member.file_name());
 126   std::string_view member_defaulted_sl_fn_name(
 127     member_defaulted_sl.member.function_name());
 128   VERIFY(member_defaulted_sl.member.line() == 46);
 129   // closing paren of constructor declaration
 130   VERIFY(member_defaulted_sl.member.column() == 25);
 131   VERIFY(member_defaulted_sl_fn_name.starts_with("s::s(int)"sv));
 132   VERIFY(member_defaulted_sl_fi_name.ends_with("1.cc"sv));
 133
 134   std::string_view member_sl_fi_name(
 135     member_sl.member.file_name());
 136   std::string_view member_sl_fn_name(
 137     member_sl.member.function_name());
 138   VERIFY(member_sl.member.line() == member_sl_line);
 139   // closing brace/paren of constructor
 140   VERIFY(member_sl.member.column() == 19);
 141   VERIFY(member_sl_fn_name.starts_with("int main()"sv));
 142   VERIFY(member_sl_fi_name.ends_with("1.cc"sv));
 143
 144   std::string_view f_sl_fi_name(f_sl.file_name());
 145   std::string_view f_sl_fn_name(f_sl.function_name());
 146   VERIFY(f_sl.line() == f_sl_line);
 147   // opening paren of call
 148   VERIFY(f_sl.column() == 32);
 149   VERIFY(f_sl_fn_name.ends_with("main()"sv));
 150   VERIFY(f_sl_fi_name.ends_with("1.cc"sv));
 151
 152   return 0;
 153 }