Hello,
I've been playing with the new generics support in 1.18beta 1 today. I've
come across a situation a couple of times where it would be convenient to
be able to conjure the zero value for a variable corresponding to a type
parameter.
I've searched a bit for this to no avail. Understandably there is not much
information on this topic in the wild yet. I've found a couple of issues in
the issue tracker like returning '_' to represent the zero value but this
does not seem to be implemented.
My workaround has been to create a dummy variable, zeroValue in the
following example. I'm wondering if this is how to solve this problem or if
there is a better way.
// Remove mapping associated with key from tree. Returns the removed value
and
// true or the zero value of V and false if there was no mapping.
func (tree *Tree[K, V]) Remove(key K) (V, bool) {
var zeroValue V
if tree.root == nil {
return zeroValue, false
}
...
}
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