74   std::function<bool(const std::string& section, const std::string& key)> body{
75       [](const std::string& section, const std::string& key) { return false; }};
76   bool operator()(const std::string& section, const std::string& key) {  in operator()
77     return body(section, key);  in operator()
85   std::function<bool(const std::string& section, const std::string& key,
87       body{[](const std::string& section, const std::string& key, int* value) {
90   bool operator()(const std::string& section, const std::string& key,  in operator()
92     return body(section, key, value);  in operator()
100   std::function<bool(const std::string& section, const std::string& key,
102       body{[](const std::string& section, const std::string& key, int value) {
105   bool operator()(const std::string& section, const std::string& key,  in operator()
107     return body(section, key, value);  in operator()
115   std::function<bool(const std::string& section, const std::string& key,
117       body{[](const std::string& section, const std::string& key,
119   bool operator()(const std::string& section, const std::string& key,  in operator()
121     return body(section, key, value);  in operator()
129   std::function<bool(const std::string& section, const std::string& key,
131       body{[](const std::string& section, const std::string& key,
133   bool operator()(const std::string& section, const std::string& key,  in operator()
135     return body(section, key, value);  in operator()
143   std::function<bool(const std::string& section, const std::string& key,
145       body{[](const std::string& section, const std::string& key, char* value,
147   bool operator()(const std::string& section, const std::string& key,  in operator()
149     return body(section, key, value, size_bytes);  in operator()
157   std::function<bool(const std::string& section, const std::string& key,
159       body{[](const std::string& section, const std::string& key,
161   bool operator()(const std::string& section, const std::string& key,  in operator()
163     return body(section, key, value);  in operator()
171   std::function<bool(const std::string& section, const std::string& key,
173       body{[](const std::string& section, const std::string& key,
175   bool operator()(const std::string& section, const std::string& key,  in operator()
177     return body(section, key, value, length);  in operator()
185   std::function<size_t(const std::string& section, const std::string& key)>
187           [](const std::string& section, const std::string& key) { return 0; }};
188   size_t operator()(const std::string& section, const std::string& key) {  in operator()
189     return body(section, key);  in operator()
197   std::function<bool(const std::string& section, const std::string& key,
199       body{[](const std::string& section, const std::string& key,
201   bool operator()(const std::string& section, const std::string& key,  in operator()
203     return body(section, key, value, length);  in operator()
221   std::function<bool(const std::string& section, const std::string& key)> body{
222       [](const std::string& section, const std::string& key) { return false; }};
223   bool operator()(const std::string& section, const std::string& key) {  in operator()
224     return body(section, key);  in operator()