From 632a98592df4eae2f48db74cc7bc23581ba73344 Mon Sep 17 00:00:00 2001
From: Rob Pike T
is not an interface type, x.(T)
a
that the dynamic type of x
is identical to the type T
(§Type identity and compatibility).
If T
is an interface type, x.(T)
asserts that the dynamic type
-of T
implements the interface T
(§Interface types).
+of x
implements the interface T
(§Interface types).
If the type assertion holds, the value of the expression is the value