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llvm/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/string_view/main.cpp 

#include <stdint.h>
#include <string>
#include <string_view>

static size_t touch_string(std::string_view &in_str_view) {
  return in_str_view.size(); // Break here to look at bad string view.
}

int main() {
  std::wstring_view wempty(L"");
  std::wstring_view s(L"hello world! מזל טוב!");
  std::wstring_view S(L"!!!!");
  std::string_view empty("");
  std::string q_source = "hello world";
  std::string_view q(q_source);
  std::string_view Q("quite a long std::strin with lots of info inside it");
  std::string_view TheVeryLongOne(
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "9012345678901234567890123456789012345678901234567890someText123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "123456789012345678901234567890123456789012345678901234567890123456789012"
      "345678901234567890123456789012345678901234567890123456789012345678901234"
      "567890123456789012345678901234567890123456789012345678901234567890123456"
      "789012345678901234567890123456789012345678901234567890123456789012345678"
      "901234567890123456789012345678901234567890123456789012345678901234567890"
      "1234567890123456789012345678901234567890");
  std::string_view IHaveEmbeddedZeros("a\0b\0c\0d", 7);
  std::wstring_view IHaveEmbeddedZerosToo(
      L"hello world!\0てざ ル゜䋨ミ㠧槊 きゅへ狦穤襩 じゃ馩リョ 䤦監", 38);
  std::u16string_view u16_string(u"ß水氶");
  std::u16string_view u16_empty(u"");
  std::u32string_view u32_string(U"🍄🍅🍆🍌");
  std::u32string_view u32_empty(U"");
  std::string_view *null_str = nullptr;

  std::string hello = "Hellooo ";
  std::string_view oops = hello + "World\n";

  q_source[0] = 'H'; // Set break point at this line.

  std::string_view *not_a_string_view = nullptr;
  touch_string(*not_a_string_view);

  return 0;
}