{"printbool", funcTag, 19},
	{"printfloat", funcTag, 21},
	{"printint", funcTag, 23},
	{"printhex", funcTag, 25},
	{"printuint", funcTag, 25},
	{"printcomplex", funcTag, 27},
	{"printstring", funcTag, 29},
	{"printpointer", funcTag, 30},
	{"printuintptr", funcTag, 31},
	{"printiface", funcTag, 30},
	{"printeface", funcTag, 30},
	{"printslice", funcTag, 30},
	{"printnl", funcTag, 9},

			}
			switch cs {
			case " ":
				on = typecheck.LookupRuntime("printsp")
			case "\n":
				on = typecheck.LookupRuntime("printnl")
			default:
				on = typecheck.LookupRuntime("printstring")
			}
		default:
			badtype(ir.OPRINT, n.Type(), nil)
			continue
		}

		r := ir.NewCallExpr(base.Pos, ir.OCALL, on, nil)
		if params := on.Type().Params(); len(params) > 0 {
			t := params[0].Type

case func(int) float64:
	printFunction(i)                       // type of i is func(int) float64
case bool, string:
	printString("type is bool or string")  // type of i is type of x (interface{})
default:
	printString("don't know the type")     // type of i is type of x (interface{})
}
</pre>

<p>
could be rewritten:
</p>

<pre>
v := x  // x is evaluated exactly once
if v == nil {

case func(int) float64:
	printFunction(i)                       // type of i is func(int) float64
case bool, string:
	printString("type is bool or string")  // type of i is type of x (interface{})
default:
	printString("don't know the type")     // type of i is type of x (interface{})
}
</pre>

<p>
could be rewritten:
</p>

<pre>
v := x  // x is evaluated exactly once
if v == nil {