Role for objects which support calling them. It's used in Block
, Routine
, Sub
, Method
, Submethod
and Macro
types.
Callables can be stored in &
-sigiled containers, the default type constraint of such a container is Callable
.
my = ; # Empty block needs a semicolonmy = -> ;my = sub () ;sub foo() ;my = ;
Methods§
method CALL-ME§
method CALL-ME(Callable : |arguments)
This method is required for the ( )
postcircumfix operator and the .( )
postcircumfix operator. It's what makes an object actually call-able and needs to be overloaded to let a given object act like a routine. If the object needs to be stored in an &
-sigiled container, it has to implement Callable.
does Callablemy = A;say a(); # OUTPUT: «called»
Applying the Callable
role is not a requirement to make an object callable; if a class simply wants to add subroutine-like semantics in a regular scalar container, the submethod CALL-ME
can be used for that.
my = A.new: values => [4,5,6,7];say (2); # OUTPUT: «6»
method Capture§
method Capture()
Throws X::Cannot::Capture
.