Boost Json Translation (zh_Hans)/Doc / Pages / Quick Look (adoc) — Chinese (Simplified Han script) @ Boost-Weblate

English

The code above defines the convenience function `extract`, which deduces the types of the struct members. This works, but requires that the struct is {req_DefaultConstructible}. An alternative is to construct the object directly, which is a little more verbose but doesn't require default construction:

20 :190
	English Serializing
	Chinese (Simplified Han script) 序列化 3/110 · 11 Needs editing
21 :191
	English Simple free functions are provided for serializing a <<ref_value>> to a {std_string} containing JSON:
	Chinese (Simplified Han script) 提供了简单的自由函数，用于将 <<ref_value>> 序列化为包含 JSON 的 {std_string}：</ref_value> 74/1010 · 101 Needs editing
22 :199
	English The serializer in this library implements a https://en.wikipedia.org/wiki/Online_algorithm[__streaming algorithm__]; it can output JSON a piece at a time, without the requirement that the entire output area is allocated at once:
	Chinese (Simplified Han script) 本库中的序列化器实现了 https://en.wikipedia.org/wiki/Online_algorithm[__streaming algorithm__]（流式算法）；它可逐段输出 JSON，无需一次性分配整个输出空间： 116/2280 · 228 Needs editing
23 :210
	English Value Conversion
	Chinese (Simplified Han script) 值转换 3/160 · 16 Needs editing
24 :211
	English Given a user-defined type:
	Chinese (Simplified Han script) 给定一个用户定义的类型： 12/260 · 26 Needs editing
25 :218
	English We can define a conversion from the user-defined type to a <<ref_value>> by defining an overload of `tag_invoke` in the same namespace. This maps `customer` to a JSON object:
	Chinese (Simplified Han script) 我们可在同一命名空间中定义 `tag_invoke` 的重载，来实现从用户定义类型到 <<ref_value>> 的转换。此操作将 `customer` 映射为 JSON 对象：</ref_value> 107/1740 · 174 Needs editing
26 :227
	English This allows us to use the library function <<ref_value_from>> to produce a <<ref_value>> from our type:
	Chinese (Simplified Han script) 这允许我们可以使用库函数 <<ref_value_from>> 从我们的类型生成一个 <<ref_value>>：</ref_value></ref_value_from> 98/1030 · 103 Needs editing
27 :235
	English The library knows what to do with standard containers. Here we convert an array of customers to a value:
	Chinese (Simplified Han script) 该库能够自动处理标准容器。以下我们将一个客户数组转换为一个值： 31/1040 · 104 Needs editing
28 :243
	English To go from JSON to a user-defined type we use <<ref_value_to>>, which uses another overload of `tag_invoke`. This converts a JSON value to a `customer`. It throws an exception if the contents of the value do not match what is expected:
	Chinese (Simplified Han script) 为将 JSON 转换为用户定义类型，我们使用 <<ref_value_to>>（它会调用 `tag_invoke` 的另一个重载）。此操作将 JSON 值转换为 `customer`。若值内容不符合预期，则抛出异常：</ref_value_to> 129/2350 · 235 Needs editing
29 :253
	English The code above defines the convenience function `extract`, which deduces the types of the struct members. This works, but requires that the struct is {req_DefaultConstructible}. An alternative is to construct the object directly, which is a little more verbose but doesn't require default construction:
	Chinese (Simplified Han script) 上述代码定义了便捷函数 `extract`，它能推导结构体成员的类型。这种方式可行，但要求该结构体是 {req_DefaultConstructible}。另一种方法是直接构造对象，虽然略显冗长，但无需默认构造： 106/3020 · 302 Needs editing
30 :263
	English Now we can construct customers from JSON:
	Chinese (Simplified Han script) 现在我们可以从 JSON 构造客户对象（customer）： 30/410 · 41 Needs editing
31 :270
	English The library's generic algorithms recognize when you are converting a <<ref_value>> to a container which resembles an array or object, so if you wanted to turn a JSON array into a vector of customers you might write:
	Chinese (Simplified Han script) 当将 <<ref_value>> 转换为类似数组或对象的容器时，库的通用算法可自动识别。因此若要将 JSON 数组转换为客户向量，可编写如下代码：</ref_value> 91/2150 · 215 Needs editing
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