Go does not support parameterized method

[snamiki1212]

Go has generics but cannot work when using method like this.

// ex)
// Syntax Error: method must have no type parameters syntax
func (us Users) Tap[T any](item T) T {
	return item
}

For that reason, go-gen-lo also cannot support some lo helpers.

// ex)
// Cannot implement because it is parameterized method
func (us Users) Reduce[R any](accumulator func(agg R, item User, index int) R, initial R) R {
	return lo.Reduce(us, accumulator)
}

REF

• proposal: spec: allow type parameters in methods golang/go#49085