libstdc++-v3/testsuite/experimental/source_location/1.cc

   1 // Copyright (C) 2017-2022 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 // { dg-do run { target c++14 } }
  19 // { dg-require-cstdint "" }
  20 // { dg-options "-Wno-address" }
  21
  22 #include <experimental/source_location>
  23 #include <experimental/string_view>
  24 #include <testsuite_hooks.h>
  25
  26 using std::experimental::source_location;
  27 using std::experimental::string_view;
  28
  29 void
  30 test01()
  31 {
  32   constexpr source_location loc = source_location::current();
  33   static_assert( loc.line() == 32 );
  34   // static_assert( loc.column() == 35 );
  35   VERIFY( loc.file_name() == __FILE__ );
  36   VERIFY( loc.function_name() == string_view(__FUNCTION__) );
  37 }
  38
  39 struct S {
  40   string_view func;
  41   source_location loc = source_location::current();
  42
  43   S(source_location loc = source_location::current())
  44   : func(__FUNCTION__), loc(loc) // values of loc will be from call-site
  45   {}
  46
  47   S(int)
  48   : func(__FUNCTION__) // values of loc should be hereabouts
  49   {}
  50 };
  51
  52 void test02()
  53 {
  54   S s0;
  55   VERIFY( s0.loc.line() == 54 );
  56   // static_assert( s0.loc.column() == 7 );
  57   VERIFY( s0.loc.file_name() == __FILE__ );
  58   VERIFY( s0.loc.function_name() == string_view(__FUNCTION__) );
  59
  60   S s1(1);
  61   VERIFY( s1.loc.line() == 48 );
  62   VERIFY( s1.loc.file_name() == __FILE__ );
  63   VERIFY( s1.loc.function_name() == s1.func );
  64 }
  65
  66 source_location f(source_location a = source_location::current()) {
  67   return a;
  68 }
  69
  70 source_location g(string_view& func) {
  71   source_location a = source_location::current();
  72   func = __FUNCTION__;
  73   return a;
  74 }
  75
  76 void test03()
  77 {
  78   auto loc = f(); // f's first argument corresponds to this line of code
  79   VERIFY( loc.line() == 78 );
  80   // static_assert( loc.column() == 16 );
  81   VERIFY( loc.file_name() == __FILE__ );
  82   VERIFY( loc.function_name() == string_view(__FUNCTION__) );
  83
  84   source_location c = source_location::current();
  85   loc = f(c); // f's first argument gets the same values as c, above
  86   VERIFY( loc.line() == 84 );
  87   // static_assert( loc.column() == 23 );
  88   VERIFY( loc.file_name() == __FILE__ );
  89   VERIFY( loc.function_name() == string_view(__FUNCTION__) );
  90
  91   string_view func;
  92   loc = g(func);
  93   VERIFY( loc.line() == 71 );
  94   // static_assert( loc.column() == 23 );
  95   VERIFY( loc.file_name() == __FILE__ );
  96   VERIFY( loc.function_name() == func );
  97 }
  98
  99 void
 100 test04()
 101 {
 102   using std::is_same;
 103   using std::uint_least32_t;
 104   auto loc = source_location::current();
 105   static_assert(is_same<decltype(loc), source_location>::value, "");
 106   static_assert(is_same<decltype(loc.line()), uint_least32_t>::value, "");
 107   static_assert(is_same<decltype(loc.column()), uint_least32_t>::value, "");
 108   static_assert(is_same<decltype(loc.file_name()), const char*>::value, "");
 109   static_assert(is_same<decltype(loc.function_name()), const char*>::value, "");
 110 }
 111
 112 int
 113 main()
 114 {
 115   test01();
 116   test02();
 117   test03();
 118   test04();
 119 }