Json Namespace Reference

JSON (JavaScript Object Notation). More...

Classes
class	BatchAllocator
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	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	StaticString
	Lightweight wrapper to tag static string. 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]

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
std::istream &	operator>> (std::istream &, Value &)
	Read from 'sin' into 'root'. More...
std::string JSON_API	valueToString (Int value)
std::string JSON_API	valueToString (UInt value)
std::string JSON_API	valueToString (LargestInt value)
std::string JSON_API	valueToString (LargestUInt value)
std::string JSON_API	valueToString (double value)
std::string JSON_API	valueToString (bool value)
std::string JSON_API	valueToQuotedString (const char *value)
std::ostream &	operator<< (std::ostream &, const Value &root)
	Output using the StyledStreamWriter. More...

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 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

std::ostream & Json::operator<<	(	std::ostream &	sout,
		const Value &	root
	)

Output using the StyledStreamWriter.

See also

Json::operator>>()

std::istream & Json::operator>>	(	std::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<<()