Tags and simple values of your own

A tag class — see writing a tag of your own — joins the decoder through the container. There are two ways to get it there, and one thing to know about both: tag classes are not services. The decoder instantiates them itself, with the data of each item it reads, so registering one only ever means naming its class. A class registered for a number the library already handles replaces the built-in one.

By discovery

A class implementing CBOR\Tag\TagInterface that lives where the container looks — src/ in a standard application — needs nothing at all: the bundle autoconfigures every implementation with the cbor.tag service tag, and takes the class of that definition without ever building it.

By configuration

A class the container does not discover is named in the configuration:

# config/packages/cbor.yaml
cbor:
    tags:
        - App\Cbor\CustomTag

or given the service tag by hand:

services:
    App\Cbor\CustomTag:
        tags: ['cbor.tag']

Simple values and floats

Major type 7 — the simple values, the floats, the break code — works the same way, with CBOR\OtherObjectInterface, usually by extending CBOR\OtherObject, the other_objects key and the cbor.other_object service tag:

cbor:
    other_objects:
        - App\Cbor\CustomObject

services:
    App\Cbor\CustomObject:
        tags: ['cbor.other_object']