126   const char* const value_str = getenv(env_var.c_str());  in BoolFromEnv()  local
127   return value_str == nullptr ? default_val : IsTruthyFlagValue(value_str);  in BoolFromEnv()
132   const char* const value_str = getenv(env_var.c_str());  in Int32FromEnv()  local
134   if (value_str == nullptr ||  in Int32FromEnv()
135       !ParseInt32(std::string("Environment variable ") + env_var, value_str,  in Int32FromEnv()
144   const char* const value_str = getenv(env_var.c_str());  in DoubleFromEnv()  local
146   if (value_str == nullptr ||  in DoubleFromEnv()
147       !ParseDouble(std::string("Environment variable ") + env_var, value_str,  in DoubleFromEnv()
163   const char* const value_str = getenv(env_var.c_str());  in KvPairsFromEnv()  local
165   if (value_str == nullptr) return default_val;  in KvPairsFromEnv()
168   if (!ParseKvPairs("Environment variable " + env_var, value_str, &value)) {  in KvPairsFromEnv()
206   const char* const value_str = ParseFlagValue(str, flag, true);  in ParseBoolFlag()  local
209   if (value_str == nullptr) return false;  in ParseBoolFlag()
212   *value = IsTruthyFlagValue(value_str);  in ParseBoolFlag()
218   const char* const value_str = ParseFlagValue(str, flag, false);  in ParseInt32Flag()  local
221   if (value_str == nullptr) return false;  in ParseInt32Flag()
224   return ParseInt32(std::string("The value of flag --") + flag, value_str,  in ParseInt32Flag()
230   const char* const value_str = ParseFlagValue(str, flag, false);  in ParseDoubleFlag()  local
233   if (value_str == nullptr) return false;  in ParseDoubleFlag()
236   return ParseDouble(std::string("The value of flag --") + flag, value_str,  in ParseDoubleFlag()
242   const char* const value_str = ParseFlagValue(str, flag, false);  in ParseStringFlag()  local
245   if (value_str == nullptr) return false;  in ParseStringFlag()
247   *value = value_str;  in ParseStringFlag()
253   const char* const value_str = ParseFlagValue(str, flag, false);  in ParseKeyValueFlag()  local
255   if (value_str == nullptr) return false;  in ParseKeyValueFlag()
257   for (const auto& kvpair : StrSplit(value_str, ',')) {  in ParseKeyValueFlag()