Query on Interfaces

[Prabhu Chawandi]

Hello,

  I was reading this article @ https://blog.golang.org/laws-of-reflection

Excerpt: 

One important detail is that the pair inside an interface always has the form (value, concrete type) and cannot have the form (value, interface type). Interfaces do not hold interface values. 

 

I could not understand it clearly, Can through some clarity with an example?

I tried this and did not give any error.

@ https://play.golang.org/p/Q5jRWp6MF7c

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Cheers
p.

[Ian Lance Taylor]

What this means is that when you write "a = b" where a and b are both
of interface type, then the value that is in b will be copied to a. a
will wind up with the dynamic type and dynamic value that were
originally in b. The dynamic type of a will not become the type of b;
it will become the dynamic type of the value stored in b.

Ian

[Prabhu Chawandi]

Thank you, it is clear now. 

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Cheers
p.