InstanceDispatch

@instancedispatch myfunction(::T, args...; kwargs...)

Write a specialized function to dispatch on instances values of type T. The only reauirement is that Type{T} has its own method for Base.instances.

Examples

@enum GreetEnum Hello Goodbye
function greet(::Val{Hello}, who)
    return "Hello " * who
end
function greet(::Val{Goodbye}, who)
    return "Goodbye " * who
end
@instancedispatch greet(::GreetEnum, who)

This last line is equivalent to defining the following method:

function greet(e::GreetEnum, who)
    if e == Hello
        return greet(Val(Hello), who)
    elseif e == Goodbye
        return greet(Val(Goodbye), who)
    else end
end