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Delegates: Difference between revisions
Added Julia language
(Adds Clojure solution) |
(Added Julia language) |
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Line 1,216:
document.write(a.operation() + "\n") ;
}</lang>
=={{header|Julia}}==
'''Module''':
<lang julia>module Delegates
export Delegator, Delegate
struct Delegator{T}
delegate::T
end
struct Delegate end
operation(x::Delegator) = thing(x.delegate)
thing(::Any) = "default implementation"
thing(::Delegate) = "delegate implementation"
end # module Delegates</lang>
'''Main''':
<lang julia>using .Delegates
a = Delegator(nothing)
b = Delegator("string")
d = Delegate()
c = Delegator(d)
@show Delegates.operation(a)
@show Delegates.operation(b)
@show Delegates.operation(c)</lang>
{{out}}
<pre>Delegates.operation(a) = "default implementation"
Delegates.operation(b) = "default implementation"
Delegates.operation(c) = "delegate implementation"</pre>
=={{header|Kotlin}}==
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