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Niels Lohmann
172eba6e46
Add See also links in both directions between the concept pages (features, home, integration) and the API pages, write API links in code font, give every entry a comment after a dash, and show the callback event figure on the parser callbacks page. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
1.2 KiB
1.2 KiB
nlohmann::adl_serializer::to_json
template<typename BasicJsonType, typename TargetType = ValueType>
static auto to_json(BasicJsonType& j, TargetType && val) noexcept(
noexcept(::nlohmann::to_json(j, std::forward<TargetType>(val))))
-> decltype(::nlohmann::to_json(j, std::forward<TargetType>(val)), void())
This function is usually called by the constructors of the basic_json class.
Parameters
j(out)- JSON value to write to
val(in)- value to read from
Examples
??? example
The example below shows how a `to_json` function can be implemented for a user-defined type. This function is called
by the `adl_serializer` when the constructor `basic_json(ns::person)` is called.
```cpp
--8<-- "examples/to_json.cpp"
```
Output:
```json
--8<-- "examples/to_json.output"
```
See also
from_json- convert JSON to a C++ value- Arbitrary Type Conversions - write your own
from_jsonandto_jsonfunctions - Converting values - overview of
get,get_toand implicit conversions
Version history
- Added in version 2.1.0.