Anonymous user
Polymorphic copy: Difference between revisions
Add Nimrod
(Add Nimrod) |
|||
Line 926:
return S.class.getSimpleName
</lang>
=={{header|Nimrod}}==
<lang nimrod>type
T = object of TObject
myValue: string
S1 = object of T
S2 = object of T
method speak(x: T) = echo "T Hello ", x.myValue
method speak(x: S1) = echo "S1 Meow ", x.myValue
method speak(x: S2) = echo "S2 Woof ", x.myValue
echo "creating initial objects of types S1, S2, and T"
var a = S1(myValue: "Green")
a.speak
var b = S2(myValue: "Blue")
b.speak
var u = T(myValue: "Blue")
u.speak
echo "Making copy of a as u, colors and types should match"
u = a
u.speak
a.speak
echo "Assigning new color to u, A's color should be unchanged."
u.myValue = "Orange"
u.speak
a.speak
echo "Assigning u to reference same object as b, colors and types should match"
u = b
u.speak
b.speak
echo "Assigning new color to u. Since u,b references same object b's color changes as well"
u.myValue = "Yellow"
u.speak
b.speak</lang>
Output:
<pre>creating initial objects of types S1, S2, and T
S1 Meow Green
S2 Woof Blue
T Hello Blue
Making copy of a as u, colors and types should match
S1 Meow Green
S1 Meow Green
Assigning new color to u, A's color should be unchanged.
S1 Meow Orange
S1 Meow Green
Assigning u to reference same object as b, colors and types should match
S2 Woof Blue
S2 Woof Blue
Assigning new color to u. Since u,b references same object b's color changes as well
S2 Woof Yellow
S2 Woof Blue</pre>
=={{header|Objective-C}}==
| |||