Json::CharReaderBuilder Class Reference

Build a CharReader implementation. More...

#include <json/reader.h>

Inherits Json::CharReader::Factory.

Public Member Functions
	CharReaderBuilder ()
	~CharReaderBuilder () override
CharReader *	newCharReader () const override
	Allocate a CharReader via operator new(). More...
bool	validate (Json::Value *invalid) const
Value &	operator[] (const String &key)
	A simple way to update a specific setting. More...
Public Member Functions inherited from Json::CharReader::Factory
virtual	~Factory ()=default

Static Public Member Functions
static void	setDefaults (Json::Value *settings)
	Called by ctor, but you can use this to reset settings_. More...
static void	strictMode (Json::Value *settings)
	Same as old Features::strictMode(). More...

Public Attributes
Json::Value	settings_
	Configuration of this builder. More...

Detailed Description

Build a CharReader implementation.

Usage:

using namespace Json;
CharReaderBuilder builder;
builder["collectComments"] = false;
Value value;
String errs;
bool ok = parseFromStream(builder, std::cin, &value, &errs);

Definition at line 289 of file reader.h.

Constructor & Destructor Documentation

CharReaderBuilder()

Json::CharReaderBuilder::CharReaderBuilder

(

)

Definition at line 1863 of file json_reader.cpp.

References setDefaults(), and settings_.

~CharReaderBuilder()

Json::CharReaderBuilder::~CharReaderBuilder ( )

overridedefault

Member Function Documentation

newCharReader()

CharReader * Json::CharReaderBuilder::newCharReader ( ) const

overridevirtual

Allocate a CharReader via operator new().

Exceptions

std::exception

if something goes wrong (e.g. invalid settings)

Implements Json::CharReader::Factory.

Definition at line 1865 of file json_reader.cpp.

References Json::Value::asBool(), and settings_.

operator[]()

Value & Json::CharReaderBuilder::operator[]

(

const String &

key

)

A simple way to update a specific setting.

Definition at line 1913 of file json_reader.cpp.

References settings_.

setDefaults()

void Json::CharReaderBuilder::setDefaults ( Json::Value *  settings )

static

Called by ctor, but you can use this to reset settings_.

Precondition

'settings' != NULL (but Json::null is fine)

Remarks

Defaults:

  (*settings)["collectComments"] = true;
  (*settings)["allowComments"] = true;
  (*settings)["strictRoot"] = false;
  (*settings)["allowDroppedNullPlaceholders"] = false;
  (*settings)["allowNumericKeys"] = false;
  (*settings)["allowSingleQuotes"] = false;
  (*settings)["stackLimit"] = 1000;
  (*settings)["failIfExtra"] = false;
  (*settings)["rejectDupKeys"] = false;
  (*settings)["allowSpecialFloats"] = false;

[CharReaderBuilderDefaults]

[CharReaderBuilderDefaults]

Definition at line 1931 of file json_reader.cpp.

Referenced by CharReaderBuilder().

strictMode()

void Json::CharReaderBuilder::strictMode ( Json::Value *  settings )

static

Same as old Features::strictMode().

Precondition

'settings' != NULL (but Json::null is fine)

Remarks

Defaults:

  (*settings)["allowComments"] = false;
  (*settings)["strictRoot"] = true;
  (*settings)["allowDroppedNullPlaceholders"] = false;
  (*settings)["allowNumericKeys"] = false;
  (*settings)["allowSingleQuotes"] = false;
  (*settings)["stackLimit"] = 1000;
  (*settings)["failIfExtra"] = true;
  (*settings)["rejectDupKeys"] = true;
  (*settings)["allowSpecialFloats"] = false;

[CharReaderBuilderStrictMode]

[CharReaderBuilderStrictMode]

Definition at line 1917 of file json_reader.cpp.

validate()

bool Json::CharReaderBuilder::validate

(

Json::Value *

invalid

)

const

Returns

true if 'settings' are legal and consistent; otherwise, indicate bad settings via 'invalid'.

Definition at line 1896 of file json_reader.cpp.

References Json::Value::empty(), Json::Value::getMemberNames(), Json::getValidReaderKeys(), and settings_.

Member Data Documentation

settings_

Json::Value Json::CharReaderBuilder::settings_

Configuration of this builder.

These are case-sensitive. Available settings (case-sensitive):

• "collectComments": false or true
  • true to collect comment and allow writing them back during serialization, false to discard comments. This parameter is ignored if allowComments is false.
• "allowComments": false or true
  • true if comments are allowed.
• "strictRoot": false or true
  • true if root must be either an array or an object value
• "allowDroppedNullPlaceholders": false or true
  • true if dropped null placeholders are allowed. (See StreamWriterBuilder.)
• "allowNumericKeys": false or true
  • true if numeric object keys are allowed.
• "allowSingleQuotes": false or true
  • true if '' are allowed for strings (both keys and values)
• "stackLimit": integer
  • Exceeding stackLimit (recursive depth of readValue()) will cause an exception.
  • This is a security issue (seg-faults caused by deeply nested JSON), so the default is low.
• "failIfExtra": false or true
  • If true, parse() returns false when extra non-whitespace trails the JSON value in the input string.
• "rejectDupKeys": false or true
  • If true, parse() returns false when a key is duplicated within an object.
• "allowSpecialFloats": false or true
  • If true, special float values (NaNs and infinities) are allowed and their values are lossfree restorable.

You can examine 'settings_` yourself to see the defaults. You can also write and read them just like any JSON Value.

See also

setDefaults()

Definition at line 330 of file reader.h.

Referenced by CharReaderBuilder(), newCharReader(), operator[](), and validate().

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

• include/json/reader.h
• src/lib_json/json_reader.cpp