var isValidRune = predicate{
	func(r rune) bool {
		return r != utf8.RuneError
	},
	"IsValidRune",
}

type TrimFuncTest struct {
	f        predicate
	in       string
	trimOut  []byte
	leftOut  []byte
	rightOut []byte
}

func not(p predicate) predicate {
	return predicate{
		func(r rune) bool {
			return !p.f(r)
		},
		"not " + p.name,
	}
}

	{"rcv_name+20(FP)", "rcv_name+20(FP)"},
	{"retoffset+28(FP)", "retoffset+28(FP)"},
	{"runtime·_GetStdHandle(SB)", "runtime._GetStdHandle(SB)"},
	{"sync\u2215atomic·AddInt64(SB)", "sync/atomic.AddInt64(SB)"},
	{"timeout+20(FP)", "timeout+20(FP)"},
	{"ts+16(FP)", "ts+16(FP)"},
	{"x+24(FP)", "x+24(FP)"},
	{"x·y(SB)", "x.y(SB)"},
	{"x·y(SP)", "x.y(SP)"},
	{"x·y+8(SB)", "x.y+8(SB)"},
	{"x·y+8(SP)", "x.y+8(SP)"},
	{"y+56(FP)", "y+56(FP)"},

}

var readMakers = []readMaker{
	{"full", func(r io.Reader) io.Reader { return r }},
	{"byte", iotest.OneByteReader},
	{"half", iotest.HalfReader},
	{"data+err", iotest.DataErrReader},
	{"timeout", iotest.TimeoutReader},
}

// Call ReadString (which ends up calling everything else)
// to accumulate the text of a file.
func readLines(b *Reader) string {
	s := ""
	for {
		s1, err := b.ReadString('\n')