42 lines
1.2 KiB
Markdown
42 lines
1.2 KiB
Markdown
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# <small>nlohmann::adl_serializer::</small>from_json
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```cpp
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// (1)
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template<typename BasicJsonType, typename TargetType = ValueType>
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static auto from_json(BasicJsonType && j, TargetType& val) noexcept(
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noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
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-> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())
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// (2)
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template<typename BasicJsonType, typename TargetType = ValueType>
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static auto from_json(BasicJsonType && j) noexcept(
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noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {})))
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-> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), detail::identity_tag<TargetType> {}))
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```
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This function is usually called by the [`get()`](../basic_json/get.md) function of the
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[basic_json](../basic_json) class (either explicit or via conversion operators).
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1. This function is chosen for default-constructible value types.
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2. This function is chosen for value types which are not default-constructible.
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## Parameters
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`j` (in)
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: JSON value to read from
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`val` (out)
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: value to write to
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## Return value
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Copy of the JSON value, converted to `ValueType`
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!!! note
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This documentation page is a stub.
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## Version history
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- Added in version 2.1.0.
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