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Mention the IO ctor in the manual #1061

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Dec 3, 2024
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Mention the IO ctor in the manual #1061

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2 changes: 1 addition & 1 deletion manual/io_custom_classes/index.md
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Expand Up @@ -245,7 +245,7 @@ class MyClass {

## Restrictions on types ROOT I/O can handle

For ROOT to be able to store a class, it must have a public constructor.
For ROOT to be able to store a class, it must have a public default constructor or a special I/O constructor (see the documentation of [`TClass::New`](https://root.cern/doc/master/classTClass.html) for more details and examples).

ROOT currently does not support I/O of `std::shared_ptr`, `std::optional`, `std::variant` and classes with data members of these types (unless they are marked as "transient").

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