libstdc++-v3/testsuite/21_strings/basic_string/modifiers/constexpr.cc

   1 // { dg-do compile { target c++20 } }
   2 // { dg-require-effective-target cxx11_abi }
   3
   4 #include <string>
   5 #include <testsuite_hooks.h>
   6
   7 constexpr bool
   8 test_insert()
   9 {
  10   std::string s;
  11   s.insert(0, "one");
  12   VERIFY( s == "one" );
  13   s.insert(0, "eleventy-");
  14   VERIFY( s == "eleventy-one" );
  15   s.insert(6, "ses at ten thirteen", 15);
  16   VERIFY( s == "elevenses at ten thirty-one" );
  17
  18   return true;
  19 }
  20
  21 static_assert( test_insert() );
  22
  23 constexpr bool
  24 test_replace()
  25 {
  26   std::string s = "abcdef";
  27   s.replace(2, 1, s.c_str(), 3);
  28   VERIFY( s == "ababcdef" );
  29   s.replace(0, 2, "", 0);
  30   VERIFY( s == "abcdef" );
  31   s.replace(1, 4, "ardwol", 6);
  32   VERIFY( s == "aardwolf" );
  33   s.replace(4, 0, "vark not wolf");
  34
  35   return true;
  36 }
  37
  38 static_assert( test_replace() );
  39
  40 constexpr bool
  41 test_erasure()
  42 {
  43   std::string s = "Spiritualized Electric Mainline";
  44   std::erase(s, 'i');
  45   VERIFY( s == "Sprtualzed Electrc Manlne" );
  46   std::erase_if(s, [](char c) { return c == 'l'; });
  47   VERIFY( s == "Sprtuazed Eectrc Manne" );
  48
  49   return true;
  50 }
  51
  52 static_assert( test_erasure() );