Function escape_pattern_string

src/url_pattern_helpers.cpp:903–926

}  // namespace

std::string escape_pattern_string(std::string_view input) {
  ada_log("escape_pattern_string called with input=", input);
  if (input.empty()) [[unlikely]] {
    return "";
  }
  // Assert: input is an ASCII string.
  ADA_ASSERT_TRUE(ada::idna::is_ascii(input));
  // Let result be the empty string.
  std::string result{};
  // Reserve extra space for potential escapes
  result.reserve(input.size() * 2);

  // While index is less than input's length:
  for (const char c : input) {
    if (should_escape_pattern_char(c)) {
      // Append U+005C (\) to the end of result.
      result.push_back('\\');
    }
    // Append c to the end of result.
    result.push_back(c);
  }
  // Return result.
  return result;
}

namespace {
constexpr std::array<uint8_t, 256> escape_regexp_table = []() consteval {