func (x unknownVal) ExactString() string { return x.String() }
func (x boolVal) ExactString() string    { return x.String() }
func (x *stringVal) ExactString() string { return strconv.Quote(x.string()) }
func (x int64Val) ExactString() string   { return x.String() }
func (x intVal) ExactString() string     { return x.String() }

func (x ratVal) ExactString() string {
	r := x.val
	if r.IsInt() {

		if gotStr != typStr {
			t.Errorf("Eval(%q) got type %s, want %s", expr, gotStr, typStr)
			return
		}
	}

	// compare values
	gotStr := ""
	if gotTv.Value != nil {
		gotStr = gotTv.Value.ExactString()
	}
	if gotStr != valStr {
		t.Errorf("Eval(%q) got value %s, want %s", expr, gotStr, valStr)
	}
}

func TestEvalBasic(t *testing.T) {
	fset := token.NewFileSet()
	for _, typ := range Typ[Bool : String+1] {

pkg go/build, type Package struct, InvalidGoFiles []string
pkg go/constant, func ToComplex(Value) Value
pkg go/constant, func ToFloat(Value) Value
pkg go/constant, func ToInt(Value) Value
pkg go/constant, type Value interface, ExactString() string
pkg go/types, method (*Package) SetName(string)
pkg go/types, type ImportMode int
pkg go/types, type ImporterFrom interface { Import, ImportFrom }

	for _, test := range stringTests {
		x := val(test.input)
		if got := x.String(); got != test.short {
			t.Errorf("%s: got %q; want %q as short string", test.input, got, test.short)
		}
		if got := x.ExactString(); got != test.exact {
			t.Errorf("%s: got %q; want %q as exact string", test.input, got, test.exact)
		}
	}
}

// ----------------------------------------------------------------------------

			t.Errorf("package %s: got type %s; want %s", name, got, test.typ)
			continue
		}

		// if we have a constant, check that value is correct
		if tv.Value != nil {
			if got := tv.Value.ExactString(); got != test.val {
				t.Errorf("package %s: got value %s; want %s", name, got, test.val)
			}
		} else {
			if test.val != "" {
				t.Errorf("package %s: no constant found; want %s", name, test.val)
			}

			t.Errorf("package %s: got type %s; want %s", name, got, test.typ)
			continue
		}

		// if we have a constant, check that value is correct
		if tv.Value != nil {
			if got := tv.Value.ExactString(); got != test.val {
				t.Errorf("package %s: got value %s; want %s", name, got, test.val)
			}
		} else {
			if test.val != "" {
				t.Errorf("package %s: no constant found; want %s", name, test.val)
			}