nim_cpp_wrapper_util::Json::StreamWriterBuilder类 参考

Build a StreamWriter implementation. 更多...

#include <writer.h>

类 nim_cpp_wrapper_util::Json::StreamWriterBuilder 继承关系图:

Public 成员函数
	StreamWriterBuilder ()
	~StreamWriterBuilder () override
StreamWriter *	newStreamWriter () const override
bool	validate (nim_cpp_wrapper_util::Json::Value *invalid) const
Value &	operator[] (const String &key)
Public 成员函数 继承自 nim_cpp_wrapper_util::Json::StreamWriter::Factory
virtual	~Factory ()
virtual StreamWriter *	newStreamWriter () const =0
	Allocate a CharReader via operator new().

静态 Public 成员函数
static void	setDefaults (nim_cpp_wrapper_util::Json::Value *settings)

Public 属性
nim_cpp_wrapper_util::Json::Value	settings_

详细描述

Build a StreamWriter implementation.

Usage:

using namespace Json;
Value value = ...;
StreamWriterBuilder builder;
builder["commentStyle"] = "None";
builder["indentation"] = "   ";  // or whatever you like
std::unique_ptr<nim_cpp_wrapper_util::Json::StreamWriter> writer(
   builder.newStreamWriter());
writer->write(value, &std::cout);
std::cout << std::endl;  // add lf and flush

构造及析构函数说明

StreamWriterBuilder()

nim_cpp_wrapper_util::Json::StreamWriterBuilder::StreamWriterBuilder

(

)

~StreamWriterBuilder()

nim_cpp_wrapper_util::Json::StreamWriterBuilder::~StreamWriterBuilder ( )

overridedefault

成员函数说明

newStreamWriter()

StreamWriter * nim_cpp_wrapper_util::Json::StreamWriterBuilder::newStreamWriter ( ) const

overridevirtual

异常

std::exception

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

实现了 nim_cpp_wrapper_util::Json::StreamWriter::Factory.

operator[]()

Value & nim_cpp_wrapper_util::Json::StreamWriterBuilder::operator[]

(

const String &

key

)

A simple way to update a specific setting.

setDefaults()

void nim_cpp_wrapper_util::Json::StreamWriterBuilder::setDefaults ( nim_cpp_wrapper_util::Json::Value *  settings )

static

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

前置条件

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

备注

Defaults:

[StreamWriterBuilderDefaults]

[StreamWriterBuilderDefaults]

validate()

bool nim_cpp_wrapper_util::Json::StreamWriterBuilder::validate

(

nim_cpp_wrapper_util::Json::Value *

invalid

)

const

返回

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

类成员变量说明

settings_

nim_cpp_wrapper_util::Json::Value nim_cpp_wrapper_util::Json::StreamWriterBuilder::settings_

Configuration of this builder. Available settings (case-sensitive):

• "commentStyle": "None" or "All"
• "indentation": "<anything>".
• Setting this to an empty string also omits newline characters.
• "enableYAMLCompatibility": false or true
• slightly change the whitespace around colons
• "dropNullPlaceholders": false or true
• Drop the "null" string from the writer's output for nullValues. Strictly speaking, this is not valid JSON. But when the output is being fed to a browser's JavaScript, it makes for smaller output and the browser can handle the output just fine.
• "useSpecialFloats": false or true
• If true, outputs non-finite floating point values in the following way: NaN values as "NaN", positive infinity as "Infinity", and negative infinity as "-Infinity".
• "precision": int
• Number of precision digits for formatting of real values.
• "precisionType": "significant"(default) or "decimal"
• Type of precision for formatting of real values.

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

参见

setDefaults()

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该类的文档由以下文件生成:

• D:/GitLab/builds/5sbaxrcd/0/nim-pc/california/nim-cross-platform-sdk/exports/wrapper/nim_wrapper_util/json/writer.h
• D:/GitLab/builds/5sbaxrcd/0/nim-pc/california/nim-cross-platform-sdk/exports/wrapper/nim_wrapper_util/json_writer.cpp