rapidjson::GenericValue< Encoding, Allocator > Class Template Reference

Represents a JSON value. Use Value for UTF8 encoding and default allocator. More...

#include <document.h>

Inheritance diagram for rapidjson::GenericValue< Encoding, Allocator >:
rapidjson::GenericDocument< Encoding, Allocator, StackAllocator >

Classes

struct  ArrayData
 
union  Data
 
struct  Flag
 
union  Number
 
struct  ObjectData
 
struct  ShortString
 
struct  String
 

Public Types

typedef GenericMember< Encoding, AllocatorMember
 Name-value pair in an object.
 
typedef Encoding EncodingType
 Encoding type from template parameter.
 
typedef Allocator AllocatorType
 Allocator type from template parameter.
 
typedef Encoding::Ch Ch
 Character type derived from Encoding.
 
typedef GenericStringRef< ChStringRefType
 Reference to a constant string.
 
typedef GenericMemberIterator< false, Encoding, Allocator >::Iterator MemberIterator
 Member iterator for iterating in object.
 
typedef GenericMemberIterator< true, Encoding, Allocator >::Iterator ConstMemberIterator
 Constant member iterator for iterating in object.
 
typedef GenericValueValueIterator
 Value iterator for iterating in array.
 
typedef GenericValue< Encoding, AllocatorValueType
 Value type of itself.
 
typedef GenericArray< false, ValueTypeArray
 
typedef GenericArray< true, ValueTypeConstArray
 
typedef GenericObject< false, ValueTypeObject
 
typedef GenericObject< true, ValueTypeConstObject
 

Public Attributes

const typedef GenericValueConstValueIterator
 Constant value iterator for iterating in array.
 

Constructors and destructor.

 GenericValue () RAPIDJSON_NOEXCEPT
 Default constructor creates a null value.
 
 GenericValue (Type type) RAPIDJSON_NOEXCEPT
 Constructor with JSON value type. More...
 
template<typename SourceAllocator >
 GenericValue (const GenericValue< Encoding, SourceAllocator > &rhs, Allocator &allocator, bool copyConstStrings=false)
 Explicit copy constructor (with allocator) More...
 
 GenericValue (bool b) RAPIDJSON_NOEXCEPT
 Constructor for boolean value. More...
 
 GenericValue (int i) RAPIDJSON_NOEXCEPT
 Constructor for int value.
 
 GenericValue (unsigned u) RAPIDJSON_NOEXCEPT
 Constructor for unsigned value.
 
 GenericValue (int64_t i64) RAPIDJSON_NOEXCEPT
 Constructor for int64_t value.
 
 GenericValue (uint64_t u64) RAPIDJSON_NOEXCEPT
 Constructor for uint64_t value.
 
 GenericValue (double d) RAPIDJSON_NOEXCEPT
 Constructor for double value.
 
 GenericValue (float f) RAPIDJSON_NOEXCEPT
 Constructor for float value.
 
 GenericValue (const Ch *s, SizeType length) RAPIDJSON_NOEXCEPT
 Constructor for constant string (i.e. do not make a copy of string)
 
 GenericValue (StringRefType s) RAPIDJSON_NOEXCEPT
 Constructor for constant string (i.e. do not make a copy of string)
 
 GenericValue (const Ch *s, SizeType length, Allocator &allocator)
 Constructor for copy-string (i.e. do make a copy of string)
 
 GenericValue (const Ch *s, Allocator &allocator)
 Constructor for copy-string (i.e. do make a copy of string)
 
 GenericValue (const std::basic_string< Ch > &s, Allocator &allocator)
 Constructor for copy-string from a string object (i.e. do make a copy of string) More...
 
 GenericValue (Array a) RAPIDJSON_NOEXCEPT
 Constructor for Array. More...
 
 GenericValue (Object o) RAPIDJSON_NOEXCEPT
 Constructor for Object. More...
 
 ~GenericValue ()
 Destructor. More...
 

Assignment operators

enum  {
  kBoolFlag = 0x0008, kNumberFlag = 0x0010, kIntFlag = 0x0020, kUintFlag = 0x0040,
  kInt64Flag = 0x0080, kUint64Flag = 0x0100, kDoubleFlag = 0x0200, kStringFlag = 0x0400,
  kCopyFlag = 0x0800, kInlineStrFlag = 0x1000, kNullFlag = kNullType, kTrueFlag = kTrueType | kBoolFlag,
  kFalseFlag = kFalseType | kBoolFlag, kNumberIntFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag, kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag | kInt64Flag, kNumberInt64Flag = kNumberType | kNumberFlag | kInt64Flag,
  kNumberUint64Flag = kNumberType | kNumberFlag | kUint64Flag, kNumberDoubleFlag = kNumberType | kNumberFlag | kDoubleFlag, kNumberAnyFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag | kUintFlag | kUint64Flag | kDoubleFlag, kConstStringFlag = kStringType | kStringFlag,
  kCopyStringFlag = kStringType | kStringFlag | kCopyFlag, kShortStringFlag = kStringType | kStringFlag | kCopyFlag | kInlineStrFlag, kObjectFlag = kObjectType, kArrayFlag = kArrayType,
  kTypeMask = 0x07
}
 
Data data_
 
template<typename , typename , typename >
class GenericDocument
 
static const SizeType kDefaultArrayCapacity = 16
 
static const SizeType kDefaultObjectCapacity = 16
 
GenericValueoperator= (GenericValue &rhs) RAPIDJSON_NOEXCEPT
 Assignment with move semantics. More...
 
GenericValueoperator= (StringRefType str) RAPIDJSON_NOEXCEPT
 Assignment of constant string reference (no copy) More...
 
template<typename T >
 RAPIDJSON_DISABLEIF_RETURN ((internal::IsPointer< T >),(GenericValue &)) operator
 Assignment with primitive types. More...
 
const RAPIDJSON_FORCEINLINE ChGetStringPointer () const
 
const RAPIDJSON_FORCEINLINE ChSetStringPointer (const Ch *str)
 
RAPIDJSON_FORCEINLINE GenericValueGetElementsPointer () const
 
RAPIDJSON_FORCEINLINE GenericValueSetElementsPointer (GenericValue *elements)
 
RAPIDJSON_FORCEINLINE MemberGetMembersPointer () const
 
RAPIDJSON_FORCEINLINE MemberSetMembersPointer (Member *members)
 
void SetArrayRaw (GenericValue *values, SizeType count, Allocator &allocator)
 
void SetObjectRaw (Member *members, SizeType count, Allocator &allocator)
 Initialize this value as object with initial data, without calling destructor.
 
void SetStringRaw (StringRefType s) RAPIDJSON_NOEXCEPT
 Initialize this value as constant string, without calling destructor.
 
void SetStringRaw (StringRefType s, Allocator &allocator)
 Initialize this value as copy string with initial data, without calling destructor.
 
void RawAssign (GenericValue &rhs) RAPIDJSON_NOEXCEPT
 Assignment without calling destructor.
 
template<typename SourceAllocator >
bool StringEqual (const GenericValue< Encoding, SourceAllocator > &rhs) const
 

Detailed Description

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
class rapidjson::GenericValue< Encoding, Allocator >

Represents a JSON value. Use Value for UTF8 encoding and default allocator.

A JSON value can be one of 7 types. This class is a variant type supporting these types.

Use the Value if UTF8 and default allocator

Template Parameters
EncodingEncoding of the value. (Even non-string values need to have the same encoding in a document)
AllocatorAllocator type for allocating memory of object, array and string.

Constructor & Destructor Documentation

◆ GenericValue() [1/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( Type  type)
inlineexplicit

Constructor with JSON value type.

This creates a Value of specified type with default content.

Parameters
typeType of the value.
Note
Default content for number is zero.

◆ GenericValue() [2/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
template<typename SourceAllocator >
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( const GenericValue< Encoding, SourceAllocator > &  rhs,
Allocator allocator,
bool  copyConstStrings = false 
)
inline

Explicit copy constructor (with allocator)

Creates a copy of a Value by using the given Allocator

Template Parameters
SourceAllocatorallocator of rhs
Parameters
rhsValue to copy from (read-only)
allocatorAllocator for allocating copied elements and buffers. Commonly use GenericDocument::GetAllocator().
copyConstStringsForce copying of constant strings (e.g. referencing an in-situ buffer)
See also
CopyFrom()

◆ GenericValue() [3/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( bool  b)
inlineexplicit

Constructor for boolean value.

Parameters
bBoolean value
Note
This constructor is limited to real boolean values and rejects implicitly converted types like arbitrary pointers. Use an explicit cast to bool, if you want to construct a boolean JSON value in such cases.

◆ GenericValue() [4/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( const std::basic_string< Ch > &  s,
Allocator allocator 
)
inline

Constructor for copy-string from a string object (i.e. do make a copy of string)

Note
Requires the definition of the preprocessor symbol RAPIDJSON_HAS_STDSTRING.

◆ GenericValue() [5/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( Array  a)
inline

Constructor for Array.

Parameters
aAn array obtained by GetArray().
Note
Array is always pass-by-value.
the source array is moved into this value and the sourec array becomes empty.

◆ GenericValue() [6/6]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::GenericValue ( Object  o)
inline

Constructor for Object.

Parameters
oAn object obtained by GetObject().
Note
Object is always pass-by-value.
the source object is moved into this value and the sourec object becomes empty.

◆ ~GenericValue()

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
rapidjson::GenericValue< Encoding, Allocator >::~GenericValue ( )
inline

Destructor.

Need to destruct elements of array, members of object, or copy-string.

Member Function Documentation

◆ operator=() [1/2]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
GenericValue& rapidjson::GenericValue< Encoding, Allocator >::operator= ( GenericValue< Encoding, Allocator > &  rhs)
inline

Assignment with move semantics.

Parameters
rhsSource of the assignment. It will become a null value after assignment.

◆ operator=() [2/2]

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
GenericValue& rapidjson::GenericValue< Encoding, Allocator >::operator= ( StringRefType  str)
inline

Assignment of constant string reference (no copy)

Parameters
strConstant string reference to be assigned
Note
This overload is needed to avoid clashes with the generic primitive type assignment overload below.
See also
GenericStringRef, operator=(T)

◆ RAPIDJSON_DISABLEIF_RETURN()

template<typename Encoding, typename Allocator = MemoryPoolAllocator<>>
template<typename T >
rapidjson::GenericValue< Encoding, Allocator >::RAPIDJSON_DISABLEIF_RETURN ( (internal::IsPointer< T >)  ,
(GenericValue< Encoding, Allocator > &)   
)

Assignment with primitive types.

Template Parameters
TEither Type, int, unsigned, int64_t, uint64_t
Parameters
valueThe value to be assigned.
Note
The source type T explicitly disallows all pointer types, especially (const) Ch*. This helps avoiding implicitly referencing character strings with insufficient lifetime, use SetString(const Ch*, Allocator&) (for copying) or StringRef() (to explicitly mark the pointer as constant) instead. All other pointer types would implicitly convert to bool, use SetBool() instead. Set boolean value

The documentation for this class was generated from the following file: