Json Namespace Reference

JSON (JavaScript Object Notation). More...

Classes
struct	BuiltStyledStreamWriter
class	CharReader
class	CharReaderBuilder
	Build a CharReader implementation. More...
struct	CommentStyle
	Scoped enums are not available until C++11. More...
class	Exception
class	FastWriter
	Outputs a Value in JSON format without formatting (not human friendly). More...
class	Features
	Configuration passed to reader and writer. This configuration object can be used to force the Reader or Writer to behave in a standard conforming way. More...
class	LogicError
class	OurCharReader
class	OurFeatures
class	OurReader
class	Path
	Experimental and untested: represents a "path" to access a node. More...
class	PathArgument
	Experimental and untested: represents an element of the "path" to access a node. More...
class	Reader
	Unserialize a JSON document into a Value. More...
class	RuntimeError
class	SecureAllocator
class	StaticString
	Lightweight wrapper to tag static string. More...
class	StreamWriter
class	StreamWriterBuilder
	Build a StreamWriter implementation. More...
class	StyledStreamWriter
	Writes a Value in JSON format in a human friendly way, to a stream rather than to a string. More...
class	StyledWriter
	Writes a Value in JSON format in a human friendly way. More...
class	Value
	Represents a JSON value. More...
class	ValueConstIterator
	const iterator for object and array value. More...
class	ValueIterator
	Iterator for object and array value. More...
class	ValueIteratorBase
	base class for Value iterators. More...
class	Writer
	Abstract class for writers. More...

Typedefs
typedef int	Int
typedef unsigned int	UInt
typedef long long int	Int64
typedef unsigned long long int	UInt64
typedef Int64	LargestInt
typedef UInt64	LargestUInt
typedef unsigned int	ArrayIndex
typedef char	UIntToStringBuffer[uintToStringBufferSize]
typedef std::auto_ptr< CharReader >	CharReaderPtr
typedef std::auto_ptr< StreamWriter >	StreamWriterPtr

Enumerations
enum	ValueType {   nullValue = 0, intValue, uintValue, realValue,   stringValue, booleanValue, arrayValue, objectValue }
	Type of the value held by a Value object. More...
enum	CommentPlacement { commentBefore = 0, commentAfterOnSameLine, commentAfter, numberOfCommentPlacement }
enum	{ uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1 }

Functions
template<typename T , typename U >
bool	operator== (const SecureAllocator< T > &, const SecureAllocator< U > &)
template<typename T , typename U >
bool	operator!= (const SecureAllocator< T > &, const SecureAllocator< U > &)
JSONCPP_NORETURN void	throwRuntimeError (JSONCPP_STRING const &msg)
	used internally
JSONCPP_NORETURN void	throwLogicError (JSONCPP_STRING const &msg)
	used internally
bool JSON_API	parseFromStream (CharReader::Factory const &, JSONCPP_ISTREAM &, Value *root, std::string *errs)
JSON_API JSONCPP_ISTREAM &	operator>> (JSONCPP_ISTREAM &, Value &)
	Read from 'sin' into 'root'. More...
JSONCPP_STRING JSON_API	writeString (StreamWriter::Factory const &factory, Value const &root)
	Write into stringstream, then return string, for convenience. A StreamWriter will be created from the factory, used, and then deleted.
JSONCPP_STRING JSON_API	valueToString (Int value)
JSONCPP_STRING JSON_API	valueToString (UInt value)
JSONCPP_STRING JSON_API	valueToString (LargestInt value)
JSONCPP_STRING JSON_API	valueToString (LargestUInt value)
JSONCPP_STRING JSON_API	valueToString (double value)
JSONCPP_STRING JSON_API	valueToString (bool value)
JSONCPP_STRING JSON_API	valueToQuotedString (const char *value)
JSON_API JSONCPP_OSTREAM &	operator<< (JSONCPP_OSTREAM &, const Value &root)
	Output using the StyledStreamWriter. More...
bool	parseFromStream (CharReader::Factory const &fact, JSONCPP_ISTREAM &sin, Value *root, JSONCPP_STRING *errs)
JSONCPP_STRING	valueToString (double value, bool useSpecialFloats, unsigned int precision)
JSONCPP_OSTREAM &	operator<< (JSONCPP_OSTREAM &sout, Value const &root)

Variables
const unsigned char &	kNullRef = kNull[0]

Detailed Description

JSON (JavaScript Object Notation).

Enumeration Type Documentation

anonymous enum

Enumerator
uintToStringBufferSize	Constant that specify the size of the buffer that must be passed to uintToString.

enum Json::CommentPlacement

Enumerator
commentBefore	a comment placed on the line before a value
commentAfterOnSameLine	a comment just after a value on the same line
commentAfter	a comment on the line after a value (only make sense for
numberOfCommentPlacement	root value)

enum Json::ValueType

Type of the value held by a Value object.

Enumerator
nullValue	'null' value
intValue	signed integer value
uintValue	unsigned integer value
realValue	double value
stringValue	UTF-8 string value.
booleanValue	bool value
arrayValue	array value (ordered list)
objectValue	object value (collection of name/value pairs).

Function Documentation

JSON_API JSONCPP_OSTREAM& Json::operator<<	(	JSONCPP_OSTREAM &	,
		const Value &	root
	)

Output using the StyledStreamWriter.

See also

Json::operator>>()

JSONCPP_ISTREAM & Json::operator>>	(	JSONCPP_ISTREAM &	sin,
		Value &	root
	)

Read from 'sin' into 'root'.

Always keep comments from the input JSON.

This can be used to read a file into a particular sub-object. For example:

Json::Value root;
cin >> root["dir"]["file"];
cout << root;

Result:

{
"dir": {
    "file": {
    // The input stream JSON would be nested here.
    }
}
}

Exceptions

std::exception

on parse error.

See also

Json::operator<<()

bool JSON_API Json::parseFromStream	(	CharReader::Factory const &	,
		JSONCPP_ISTREAM &	,
		Value *	root,
		std::string *	errs
	)

Consume entire stream and use its begin/end. Someday we might have a real StreamReader, but for now this is convenient.