e.SetTypecheck(1)
	return e
}

// DeclareParams creates Names for all of the parameters in fn's
// signature and adds them to fn.Dcl.
//
// If setNname is true, then it also sets types.Field.Nname for each
// parameter.
func (fn *Func) DeclareParams(setNname bool) {
	if fn.Dcl != nil {
		base.FatalfAt(fn.Pos(), "%v already has Dcl", fn)
	}