# defprotocol Define a protocol — a set of methods that types can implement. ## Syntax

defprotocol ProtocolName {
    method-name {}
    method-with-args {arg1 arg2}
}

## Examples

defprotocol Showable {
    show {}
    format {prefix}
}

defprotocol Measurable {
    area {}
    perimeter {}
}

# Check what protocols exist
echo [protocols]

# Get protocol info
set info [protocols Showable]
echo $info~methods
echo $info~types

## Notes - Protocols are implemented externally via `defimpl` — not in the protocol definition - A type can implement multiple protocols - Protocol methods dispatch based on the target value's type - Use `[satisfies ProtocolName $value]` to check if a value supports a protocol ## See Also `defimpl`, `defmethod`, `deftype`, `satisfies`