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A comment on Problems with Go's design. Parent comment

Re:Problems with Go's design by Jabbles on Wednesday October 28, 2015 @04:19PM (#10467095)
I don't see how it's not type covariance.

Go's slices are generic to the extent needed, and the subtyping of Go's interfaces fits the requirements for ordering of types well enough.

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Re:Problems with Go's design by pcwalton on Wednesday October 28, 2015 @04:21PM (#10467111)
In Go, if T implements interface I, T is not a subtype of the interface type I. T can be converted to the interface type I, but it's not a subtype.
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Re:Problems with Go's design by sgeop on Wednesday October 28, 2015 @10:22PM (#10468824)
What's the difference though? Is this true of interfaces in Java for instance, or does it have to do with the specific implementation of go?
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