Other types

The Callable data type

The Callable data type matches callable lambdas provided as function arguments.

There is no way to interact with Callable values in the Puppet language, but Ruby functions written to the function API (Puppet::Functions) can use Callable to inspect the lambda provided to the function.

The full signature for Callable is:

Callable[ (<DATA TYPE>, ...,) <MIN COUNT>, <MAX COUNT>, <BLOCK TYPE> ]

All of these parameters are optional.

Position	Parameter	Data type	Default value	Description
1 to n	Data type	Type	none	Any number of data types, representing the data type of each argument the lambda accepts.
-3 (third last)	Minimum count	Integer	0	The minimum number of arguments the lambda accepts. This parameter accepts the value default, which uses its default value 0.
-2 (second last)	Maximum count	Integer	infinity	The maximum number of arguments the lambda accepts. This parameter accepts the value default, which uses its default value, infinity.
-1 (last)	Block type	Type[Callable]	none	The block_type of the lambda.