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

Exit Zen

7 :45
	English If <<ref_try_value_to>> is used with a type, for which there's no `tag_invoke` overload of the form described in this section, but there is one of the form intended for <<ref_value_to>>, then the library still tries to perform the conversion. It uses the throwing overload, and attempts to convert any thrown exception into an {ref_error_code}. Note, though, that such approach will likely be slower then a dedicated overload.
	Chinese (Simplified Han script) 如果将 <<ref_try_value_to>> 与某种类型搭配使用，而该类型不存在本节中所描述的这种形式的 `tag_invoke` 重载函数，但存在用于 <<ref_value_to>> 形式的那种重载函数，那么库仍会尝试进行转换。它会使用抛出异常的重载函数，并尝试将任何抛出的异常转换为 {ref_error_code}。不过需要注意的是，这种方式可能比专门的重载函数要慢一些。</ref_value_to></ref_try_value_to> 238/4260 · 426 Needs editing
8 :52
	English The opposite is also true: if there's a `tag_invoke` overload intended for <<ref_try_value_to>>, but not for <<ref_value_to>>, then calling <<ref_value_to>> will invoke the non-throwing overload, then construct a {ref_system_error} from the {ref_error_code} and throw it. Due to these fallbacks, it is recommended that users provide the overload from this section, rather then the other one, if they ever intend to use <<ref_try_value_to>>.
	Chinese (Simplified Han script) 反之亦然：如果存在适用于<<ref_try_value_to>> 的 tag_invoke 重载，但没有适用于 <<ref_value_to>> 的重载，那么调用 <<ref_value_to>> 时会转而调用不抛异常的重载，随后根据返回的 {ref_error_code} 构造一个 {ref_system_error} 并抛出。由于存在上述回退机制，建议用户在计划使用 <<ref_try_value_to>> 时，优先提供本节所述的不抛异常重载，而非抛异常的重载。</ref_try_value_to></ref_value_to></ref_value_to></ref_try_value_to> 327/4400 · 440 Needs editing
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