Data Structures | Typedefs | Enumerations | Functions
Json Namespace Reference

JSON (JavaScript Object Notation). More...

Data Structures

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 int64_t Int64
 
typedef uint64_t UInt64
 
typedef Int64 LargestInt
 
typedef UInt64 LargestUInt
 
template<typename T >
using Allocator = typename std::conditional< JSONCPP_USING_SECURE_MEMORY, SecureAllocator< T >, std::allocator< T >>::type
 
using String = std::basic_string< char, std::char_traits< char >, Allocator< char >>
 
using IStringStream = std::basic_istringstream< String::value_type, String::traits_type, String::allocator_type >
 
using OStringStream = std::basic_ostringstream< String::value_type, String::traits_type, String::allocator_type >
 
using IStream = std::istream
 
using OStream = std::ostream
 
typedef unsigned int ArrayIndex
 
typedef char UIntToStringBuffer[uintToStringBufferSize]
 
typedef std::auto_ptr< CharReaderCharReaderPtr
 
typedef std::auto_ptr< StreamWriterStreamWriterPtr
 

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  PrecisionType { significantDigits = 0, decimalPlaces }
 Type of precision for formatting of real values. More...
 
enum  { uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1 }
 
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 > &)
 
void throwRuntimeError (String const &msg)
 used internally More...
 
void throwLogicError (String const &msg)
 used internally More...
 
void swap (Value &a, Value &b)
 
bool parseFromStream (CharReader::Factory const &, IStream &, Value *root, std::string *errs)
 
IStreamoperator>> (IStream &, Value &)
 Read from 'sin' into 'root'. More...
 
String 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. More...
 
String valueToString (Int value)
 
String valueToString (UInt value)
 
String valueToString (LargestInt value)
 
String valueToString (LargestUInt value)
 
String valueToString (double value, unsigned int precision=Value::defaultRealPrecision, PrecisionType precisionType=PrecisionType::significantDigits)
 
String valueToString (bool value)
 
String valueToQuotedString (const char *value)
 
OStreamoperator<< (OStream &, const Value &root)
 Output using the StyledStreamWriter. More...
 
template<typename Iter >
Iter fixNumericLocale (Iter begin, Iter end)
 
template<typename Iter >
void fixNumericLocaleInput (Iter begin, Iter end)
 
template<typename Iter >
Iter fixZerosInTheEnd (Iter begin, Iter end)
 
bool parseFromStream (CharReader::Factory const &fact, IStream &sin, Value *root, String *errs)
 

Detailed Description

JSON (JavaScript Object Notation).

Typedef Documentation

template<typename T >
using Json::Allocator = typedef typename std::conditional< 0 , SecureAllocator<T>, std::allocator<T>>::type
typedef unsigned int Json::ArrayIndex
typedef std::auto_ptr< CharReader > Json::CharReaderPtr
typedef int Json::Int
typedef int64_t Json::Int64
typedef std::istream Json::IStream
typedef std::basic_istringstream< String::value_type, String::traits_type, String::allocator_type > Json::IStringStream
typedef std::ostream Json::OStream
typedef std::basic_ostringstream< String::value_type, String::traits_type, String::allocator_type > Json::OStringStream
typedef std::auto_ptr< StreamWriter > Json::StreamWriterPtr
using Json::String = typedef std::basic_string<char, std::char_traits<char>, Allocator<char>>
typedef unsigned int Json::UInt
typedef uint64_t Json::UInt64
typedef char Json::UIntToStringBuffer

Enumeration Type Documentation

anonymous enum
Enumerator
uintToStringBufferSize 

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

anonymous enum
Enumerator
uintToStringBufferSize 

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

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)

Type of precision for formatting of real values.

Enumerator
significantDigits 

we set max number of significant digits in string

decimalPlaces 

we set max number of digits after "." in string

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

template<typename Iter >
Iter Json::fixNumericLocale ( Iter  begin,
Iter  end 
)

Change ',' to '.' everywhere in buffer.

We had a sophisticated way, but it did not work in WinCE.

See also
https://github.com/open-source-parsers/jsoncpp/pull/9
template<typename Iter >
void Json::fixNumericLocaleInput ( Iter  begin,
Iter  end 
)
template<typename Iter >
Iter Json::fixZerosInTheEnd ( Iter  begin,
Iter  end 
)

Return iterator that would be the new end of the range [begin,end), if we were to delete zeros in the end of string, but not the last zero before '.'.

template<typename T , typename U >
bool Json::operator!= ( const SecureAllocator< T > &  ,
const SecureAllocator< U > &   
)
OStream & Json::operator<< ( OStream sout,
const Value root 
)

Output using the StyledStreamWriter.

See also
Json::operator>>()
template<typename T , typename U >
bool Json::operator== ( const SecureAllocator< T > &  ,
const SecureAllocator< U > &   
)
IStream & Json::operator>> ( 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:

cin >> root["dir"]["file"];
cout << root;

Result:

{
"dir": {
    "file": {
    // The input stream JSON would be nested here.
    }
}
}
Exceptions
std::exceptionon parse error.
See also
Json::operator<<()
bool Json::parseFromStream ( CharReader::Factory const &  ,
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.

bool Json::parseFromStream ( CharReader::Factory const &  fact,
IStream sin,
Value root,
String errs 
)
void Json::swap ( Value a,
Value b 
)
inline
JSONCPP_NORETURN void Json::throwLogicError ( String const &  msg)

used internally

JSONCPP_NORETURN void Json::throwRuntimeError ( String const &  msg)

used internally

String Json::valueToQuotedString ( const char *  value)
String Json::valueToString ( Int  value)
String Json::valueToString ( UInt  value)
String Json::valueToString ( LargestInt  value)
String Json::valueToString ( LargestUInt  value)
String Json::valueToString ( double  value,
unsigned int  precision = Value::defaultRealPrecision,
PrecisionType  precisionType = PrecisionType::significantDigits 
)
String Json::valueToString ( bool  value)
String Json::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.