Abstract type: Difference between revisions
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Now we can tag an object that conforms to the Interface: |
Now we can tag an object that conforms to the Interface: |
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<lang genyris>tag StackInterface (XYZstack(.new))</lang> |
<lang genyris>tag StackInterface (XYZstack(.new))</lang> |
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=={{header|Go}}== |
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Go's ''interface type'' is an abstract type. It defines a set of methods that a value must have. |
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<lang go>interface { |
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Method1(value float) int |
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SetName(name string) |
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GetName() string |
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}</lang> |
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A variable of an interface type can hold a value of any type that implements the methods that are specified in the interface. You don't need to explicitly "declare" that the type "implements" the interface or anything like that -- the compatibility is purely structural based on the methods. |
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=={{header|Haskell}}== |
=={{header|Haskell}}== |
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