value_to_tag

## `value_to_tag`

Customization point tag type.

### Synopsis

Defined in header <boost/json/conversion.hpp>.

    template<
        class T>
    struct value_to_tag;

### Description

This tag type is used by the function `value_to` to select overloads of `tag_invoke`.

| This type is empty; it has no members.

### See Also

`value_from`, `value_from_tag`, `value_to`, tag_invoke: A general pattern for supporting customisable functions.

Convenience header <boost/json.hpp>.

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