diff --git a/Home.md b/Home.md index 1cb0697..82ee9d9 100644 --- a/Home.md +++ b/Home.md @@ -5,13 +5,13 @@ JSON (JavaScript Object Notation) is a lightweight data-interchange format. It c Here is an example of JSON data: ```js { - "encoding" : "UTF-8", - "plug-ins" : [ + "my-encoding" : "UTF-8", + "my-plug-ins" : [ "python", "c++", "ruby" ], - "indent" : { "length" : 3, "use_space": true } + "my-indent" : { "length": 3, "use_space": true } } ``` And here it is with ***comments***: @@ -19,17 +19,17 @@ And here it is with ***comments***: // Configuration options { // Default encoding for text - "encoding" : "UTF-8", + "my-encoding" : "UTF-8", // Plug-ins loaded at start-up - "plug-ins" : [ + "my-plug-ins" : [ "python", "c++", "ruby" ], // Tab indent size - "indent" : { "length" : 3, "use_space": true } + "my-indent" : { "length" : 3, "use_space": true } } ``` Features of *jsoncpp* @@ -46,25 +46,26 @@ Code example Json::Value root; // starts as "null"; will contain the root value after parsing std::cin >> root; -// Get the value of the member of root named 'encoding', return 'UTF-8' if there is no +// Get the value of the member of root named 'my-encoding', return 'UTF-32' if there is no // such member. -std::string encoding = root.get("encoding", "UTF-8" ).asString(); -// Get the value of the member of root named 'plug-ins', return a 'null' value if +std::string my_encoding = root.get("my-encoding", "UTF-32" ).asString(); + +// Get the value of the member of root named 'my-plug-ins'; return a 'null' value if // there is no such member. -const Json::Value plugins = root["plug-ins"]; -for ( int index = 0; index < plugins.size(); ++index ) // Iterates over the sequence elements. - loadPlugIn( plugins[index].asString() ); - -setIndentLength( root["indent"].get("length", 3).asInt() ); -setIndentUseSpace( root["indent"].get("use_space", true).asBool() ); +const Json::Value my_plugins = root["my-plug-ins"]; +for ( int index = 0; index < my_plugins.size(); ++index ) // Iterates over the sequence elements. + yourib::loadPlugIn( my_plugins[index].asString() ); + +yourlib::setIndentLength( root["my-indent"].get("length", 3).asInt() ); +yourlib::setIndentUseSpace( root["my-indent"].get("use_space", true).asBool() ); // ... // At application shutdown to make the new configuration document: // Since Json::Value has implicit constructor for all value types, it is not // necessary to explicitly construct the Json::Value object: -root["encoding"] = getCurrentEncoding(); -root["indent"]["length"] = getCurrentIndentLength(); -root["indent"]["use_space"] = getCurrentIndentUseSpace(); +root["encoding"] = yourlib::getCurrentEncoding(); +root["indent"]["length"] = yourlib::getCurrentIndentLength(); +root["indent"]["use_space"] = yourlib::getCurrentIndentUseSpace(); // Make a new JSON document with the new configuration. Preserve original comments. std::cout << root << "\n"; @@ -75,6 +76,7 @@ You can also read from a file, e.g.: #include std::ifstream config_doc("config_doc.json", std::ifstream::binary); +config_doc >> root; ``` If you need some unusual features, use *Builders*: