Function ParseBoolFlag

tests/gtest/gtest-all.cc:7199–7209

Parses a string for a bool flag, in the form of either "--flag=value" or "--flag". In the former case, the value is taken as true as long as it does not start with '0', 'f', or 'F'. In the latter case, the value is taken as true. On success, stores the value of the flag in *value, and returns true. On failure, returns false without changing *value.

// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseFlagValue(str, flag, true);

  // Aborts if the parsing failed.
  if (value_str == nullptr) return false;

  // Converts the string value to a bool.
  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
  return true;
}

// Parses a string for an Int32 flag, in the form of
// "--flag=value".