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"Why use <<ref_storage_ptr>> over {ref_polymorphic_allocator}?:: {ref_polymorphic_allocator} treats the memory resource as a reference with respect to ownership. Boost.JSON uses a reference counted smart pointer container to simplify the lifetime management of memory resources. In addition to being reference counted, <<ref_storage_ptr>> can function as an uncounted reference wrapper around a {ref_memory_resource}.
library uses the <<ref_storage_ptr>> allocator model, has the same interface on all C++ versions, and has an optimized class layout to keep the size of JSON values small. <<ref_string>> also implements an improved interface that replaces extraneous overloads with ones that use <<ref_string_view>>."为什么使用 &lt;<ref_storage_ptr>&gt; 而不是 {ref_polymorphic_allocator}？:: {ref_polymorphic_allocator} 将内存资源视为所有权的引用。Boost.JSON 使用一个引用计数智能指针容器来简化内存资源的生命周期管理。除了引用计数外，&lt;<ref_storage_ptr>&gt; 还可以作为围绕 {ref_memory_resource} 的非计数引用包装器。</ref_storage_ptr></ref_storage_ptr>
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require that <<ref_value>> be declared as a class template, which would impose an additional compilation burden. By avoiding the template, most of the function definitions in the library can be excluded from the headers and emitted in a separate static or dynamic library.
require that <<ref_value>> be declared as a class template, which would impose an additional compilation burden. By avoiding the template, most of the function definitions in the library can be excluded from the headers and emitted in a separate static or dynamic library.要求 &lt;<ref_value>&gt; 被声明为一个类模板，这会增加额外的编译负担。通过避免使用模板，库中的大部分函数定义可以从头文件中排除，并放入单独的静态库或动态库中。</ref_value>
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Using standard allocators would
Using standard allocators would使用标准分配器将会
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the simdjson parser is a read-only structure. In other words, it can't be changed, and the only way to create one is by parsing a JSON string. On the other hand, Boost.JSON allows you to modify the container holding the parsed JSON, or even build a JSON document from scratch through the container interface.
the simdjson parser is a read-only structure. In other words, it can't be changed, and the only way to create one is by parsing a JSON string. On the other hand, Boost.JSON allows you to modify the container holding the parsed JSON, or even build a JSON document from scratch through the container interface.是一个只读结构。换句话说，它不能被修改，创建它的唯一方法是解析一个 JSON 字符串。另一方面， Boost.JSON 允许你修改容纳已解析 JSON 的容器，甚至可以通过容器接口从头构建 JSON 文档。
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These libraries are not comparable. The output of
These libraries are not comparable. The output of这些库不可相提并论。simdjson 解析器的输出
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= Frequently Asked Questions
= Frequently Asked Questions常见问题
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CBOR
CBOR
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Allocator-Aware Conversion
Allocator-Aware Conversion感知分配器的转换
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Validate
Validate验证
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Pretty
Pretty美化
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= Examples
= Examples示例
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When a <<ref_value>> is formatted to a {std_ostream}, the result is serialized JSON as if by calling <<ref_serialize>>.
When a <当将 &lt;<ref_value>> is formatted to a {std_ostream}, the result is serialized JSON as if by calling <<&gt; 输出到 {std_ostream} 时，其结果等同于调用 &lt;<ref_serialize>&gt; 所生成的序列化 JSON。</ref_serialize></ref_value>.
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Formatted Output
Formatted Output格式化输出
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Functions returning {ref_result} allow you to use both approaches:
Functions returning {ref_result} allow you to use both approaches:返回 {ref_result} 的函数允许您同时使用上述两种方式：
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We can query a value for its underlying representation of a particular kind in a way that does not throw exceptions by requesting a pointer which may be null, instead of a reference. Here we use <<ref_value_if_string,`value::if_string`>> to conditionally perform an assignment without using exceptions:
We can query a value for its underlying representation of a particular kind in a way that does not throw exceptions by requesting a pointer which may be null, instead of a reference. Here we use <<ref_value_if_string,`value::if_string`>> to conditionally perform an assignment without using exceptions:我们可以通过请求一个可能为空的指针（而非引用）来查询值中特定种类的底层表示形式，而不会抛出异常。这里我们使用 &lt;<ref_value_if_string,`value::if_string`>&gt; 来条件执行赋值操作，而无需使用异常：</ref_value_if_string,`value::if_string`>
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However, as shown above these functions throw an exception if the kind in the <<ref_value>> does not match the kind denoted by the function signature. This can be used as a concise form of validation: access values as if they were the right type, but handle the resulting exception indicating if the schema of the JSON is not valid.
However, as shown above these functions throw an exception if the kind in the <<ref_value>> does not match the kind denoted by the function signature. This can be used as a concise form of validation: access values as if they were the right type, but handle the resulting exception indicating if the schema of the JSON is not valid.然而，如上所示，如果 &lt;<ref_value>&gt; 中的实际类型与函数签名所指定的类型不匹配，这些函数会抛出异常。这一行为可作为一种简洁的验证形式：以预期类型直接访问值，若 JSON 结构无效，则通过捕获异常进行处理。</ref_value>
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If the <<ref_kind>> of a <<ref_value>> is known, functions such as <<ref_value_as_bool,`value::as_bool`>> or <<ref_value_as_string,`value::as_string`>> may be used to obtain a reference to the underlying representation without changing the existing value:
If the <<ref_kind>> of a <<ref_value>> is known, functions such as <如果已知 &lt;<ref_value>&gt; 的 &lt;<ref_kind>&gt;，可使用诸如 &lt;<ref_value_as_bool,`value::as_bool`>> or <&gt; 或 &lt;<ref_value_as_string,`value::as_string`>> may be used to obtain a reference to the underlying representation without changing the existing &gt; 等函数，在不改变现有值的情况下获取对底层表示的引用：</ref_value_as_string,`value::as_string`></ref_value_as_bool,`value::as_bool`></ref_kind></ref_value:>
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The return value from emplace can be used to perform assignment or to capture a reference to the underlying element for later inspection or modification:
The return value from emplace can be used to perform assignment or to capture a reference to the underlying element for later inspection or modification:置入操作的返回值可用于执行赋值，或捕获对底层元素的引用以供后续检查或修改：
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