Boost Json Translation (zh_Hans)/Doc / Pages / Conversion / Forward (adoc)

Exit Zen

1 :10

	English = Avoiding Physical Dependency Some users, particularly library authors, may wish to provide conversions between their types and <<ref_value>>, but at the same time would prefer to avoid having their library depend on Boost.JSON. This is possible to achieve with the help of a few forward declarations. 302/10000 · 302
2 :21

	English Note that <<ref_value_from>> is declared using an out-parameter, rather then returning its result. This overload is specifically designed for this use-case. 156/10000 · 156
3 :24

	English After that the definitions of `tag_invoke` overloads should be provided. These overloads have to be templates, since <<ref_value>> is only forward-declared and hence is an incomplete type. 188/10000 · 188
4 :33

	English As discussed previously, we prefer to define a non-throwing overload of `tag_invoke` for <<ref_try_value_to>>, rather then the throwing overload for <<ref_value_to>>, as the latter can fallback to the former without performance degradation. 240/10000 · 240
5 :38

	English Forward declarations of contextual conversions are done very similarly: 71/10000 · 71
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