src/lib/reflect/all_test.go - go - Git at Google

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 package reflect

 import (
 	"io";
 	"os";
 	"reflect";
 	"testing";
 	"unsafe";
 )

 var doprint bool = false

 func is_digit(c uint8) bool {
 	return '0' <= c && c <= '9'
 }

 // streq, but '@' in t matches a string of digits
 func match(s, t string) bool {
 	for i, j := 0, 0; i < len(s) && j < len(t); i, j = i+1, j+1 {
 		if s[i] == t[j] {
 			continue
 		}
 		if is_digit(s[i]) && t[j] == '@' {
 			for is_digit(s[i+1]) {
 				i++
 			}
 		} else {
 			return false
 		}
 	}
 	return true;
 }

 func assert(s, t string) {
 	if doprint {
 		println(t)
 	}
 	if !match(s, t) {
 		panicln(s, t)
 	}
 }

 func typedump(s, t string) {
 	typ := ParseTypeString("", s);
 	assert(typeToString(typ, true), t);
 }

 func valuedump(s, t string) {
 	typ := ParseTypeString("", s);
 	v := NewZeroValue(typ);
 	if v == nil {
 		panicln("valuedump", s);
 	}
 	switch v.Kind() {
 	case IntKind:
 		v.(IntValue).Set(132);
 	case Int8Kind:
 		v.(Int8Value).Set(8);
 	case Int16Kind:
 		v.(Int16Value).Set(16);
 	case Int32Kind:
 		v.(Int32Value).Set(32);
 	case Int64Kind:
 		v.(Int64Value).Set(64);
 	case UintKind:
 		v.(UintValue).Set(132);
 	case Uint8Kind:
 		v.(Uint8Value).Set(8);
 	case Uint16Kind:
 		v.(Uint16Value).Set(16);
 	case Uint32Kind:
 		v.(Uint32Value).Set(32);
 	case Uint64Kind:
 		v.(Uint64Value).Set(64);
 	case FloatKind:
 		v.(FloatValue).Set(3200.0);
 	case Float32Kind:
 		v.(Float32Value).Set(32.1);
 	case Float64Kind:
 		v.(Float64Value).Set(64.2);
 	case StringKind:
 		v.(StringValue).Set("stringy cheese");
 	case BoolKind:
 		v.(BoolValue).Set(true);
 	}
 	assert(valueToString(v), t);
 }

 type T struct { a int; b float64; c string; d *int }

 func TestAll(tt *testing.T) {	// TODO(r): wrap up better
 	var s string;
 	var t Type;

 	// Types
 	typedump("missing", "$missing$");
 	typedump("int", "int");
 	typedump("int8", "int8");
 	typedump("int16", "int16");
 	typedump("int32", "int32");
 	typedump("int64", "int64");
 	typedump("uint", "uint");
 	typedump("uint8", "uint8");
 	typedump("uint16", "uint16");
 	typedump("uint32", "uint32");
 	typedump("uint64", "uint64");
 	typedump("float", "float");
 	typedump("float32", "float32");
 	typedump("float64", "float64");
 	typedump("int8", "int8");
 	typedump("whoknows.whatsthis", "$missing$");
 	typedump("**int8", "**int8");
 	typedump("**P.integer", "**P.integer");
 	typedump("[32]int32", "[32]int32");
 	typedump("[]int8", "[]int8");
 	typedump("map[string]int32", "map[string]int32");
 	typedump("chan<-string", "chan<-string");
 	typedump("struct {c chan *int32; d float32}", "struct{c chan*int32; d float32}");
 	typedump("func(a int8, b int32)", "func(a int8, b int32)");
 	typedump("struct {c func(? chan *P.integer, ? *int8)}", "struct{c func(chan*P.integer, *int8)}");
 	typedump("struct {a int8; b int32}", "struct{a int8; b int32}");
 	typedump("struct {a int8; b int8; b int32}", "struct{a int8; b int8; b int32}");
 	typedump("struct {a int8; b int8; c int8; b int32}", "struct{a int8; b int8; c int8; b int32}");
 	typedump("struct {a int8; b int8; c int8; d int8; b int32}", "struct{a int8; b int8; c int8; d int8; b int32}");
 	typedump("struct {a int8; b int8; c int8; d int8; e int8; b int32}", "struct{a int8; b int8; c int8; d int8; e int8; b int32}");
 	typedump("struct {a int8 \"hi there\"; }", "struct{a int8 \"hi there\"}");
 	typedump("struct {a int8 \"hi \\x00there\\t\\n\\\"\\\\\"; }", "struct{a int8 \"hi \\x00there\\t\\n\\\"\\\\\"}");
 	typedump("struct {f func(args ...)}", "struct{f func(args ...)}");
 	typedump("interface { a(? func(? func(? int) int) func(? func(? int)) int); b() }", "interface{a (func(func(int)(int))(func(func(int))(int))); b ()}");

 	// Values
 	valuedump("int8", "8");
 	valuedump("int16", "16");
 	valuedump("int32", "32");
 	valuedump("int64", "64");
 	valuedump("uint8", "8");
 	valuedump("uint16", "16");
 	valuedump("uint32", "32");
 	valuedump("uint64", "64");
 	valuedump("float32", "32.1");
 	valuedump("float64", "64.2");
 	valuedump("string", "stringy cheese");
 	valuedump("bool", "true");
 	valuedump("*int8", "*int8(0)");
 	valuedump("**int8", "**int8(0)");
 	valuedump("[5]int32", "[5]int32{0, 0, 0, 0, 0}");
 	valuedump("**P.integer", "**P.integer(0)");
 	valuedump("map[string]int32", "map[string]int32{<can't iterate on maps>}");
 	valuedump("chan<-string", "chan<-string");
 	valuedump("struct {c chan *int32; d float32}", "struct{c chan*int32; d float32}{chan*int32, 0}");
 	valuedump("func(a int8, b int32)", "func(a int8, b int32)(0)");
 	valuedump("struct {c func(? chan *P.integer, ? *int8)}", "struct{c func(chan*P.integer, *int8)}{func(chan*P.integer, *int8)(0)}");
 	valuedump("struct {a int8; b int32}", "struct{a int8; b int32}{0, 0}");
 	valuedump("struct {a int8; b int8; b int32}", "struct{a int8; b int8; b int32}{0, 0, 0}");

 	{	var tmp = 123;
 		value := NewValue(tmp);
 		assert(valueToString(value), "123");
 	}
 	{	var tmp = 123.4;
 		value := NewValue(tmp);
 		assert(valueToString(value), "123.4");
 	}
 	{
 		var tmp = byte(123);
 		value := NewValue(tmp);
 		assert(valueToString(value), "123");
 		assert(typeToString(value.Type(), false), "uint8");
 	}
 	{	var tmp = "abc";
 		value := NewValue(tmp);
 		assert(valueToString(value), "abc");
 	}
 	{
 		var i int = 7;
 		var tmp = &T{123, 456.75, "hello", &i};
 		value := NewValue(tmp);
 		assert(valueToString(value.(PtrValue).Sub()), "reflect.T{123, 456.75, hello, *int(@)}");
 	}
 	{
 		type C chan *T;	// TODO: should not be necessary
 		var tmp = new(C);
 		value := NewValue(tmp);
 		assert(valueToString(value), "*reflect.C·all_test(@)");
 	}
 //	{
 //		type A [10]int;
 //		var tmp A = A{1,2,3,4,5,6,7,8,9,10};
 //		value := NewValue(&tmp);
 //		assert(valueToString(value.(PtrValue).Sub()), "reflect.A·all_test{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}");
 //		value.(PtrValue).Sub().(ArrayValue).Elem(4).(IntValue).Set(123);
 //		assert(valueToString(value.(PtrValue).Sub()), "reflect.A·all_test{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}");
 //	}
 	{
 		type AA []int;
 		var tmp = AA{1,2,3,4,5,6,7,8,9,10};
 		value := NewValue(&tmp);	// TODO: NewValue(tmp) too
 		assert(valueToString(value.(PtrValue).Sub()), "reflect.AA·all_test{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}");
 		value.(PtrValue).Sub().(ArrayValue).Elem(4).(IntValue).Set(123);
 		assert(valueToString(value.(PtrValue).Sub()), "reflect.AA·all_test{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}");
 	}

 	{
 		var ip *int32;
 		var i int32 = 1234;
 		vip := NewValue(&ip);
 		vi := NewValue(i);
 		vip.(PtrValue).Sub().(PtrValue).SetSub(vi);
 		if *ip != 1234 {
 			panicln("SetSub failure", *ip);
 		}
 	}

 	var pt PtrType;
 	var st StructType;
 	var mt MapType;
 	var at ArrayType;
 	var ct ChanType;
 	var name string;
 	var typ Type;
 	var tag string;
 	var offset int;

 	// Type strings
 	t = ParseTypeString("", "int8");
 	assert(t.String(), "int8");

 	t = ParseTypeString("", "*int8");
 	assert(t.String(), "*int8");
 	pt = t.(PtrType);
 	assert(pt.Sub().String(), "int8");

 	t = ParseTypeString("", "*struct {c chan *int32; d float32}");
 	assert(t.String(), "*struct {c chan *int32; d float32}");
 	pt = t.(PtrType);
 	assert(pt.Sub().String(), "struct {c chan *int32; d float32}");
 	st = pt.Sub().(StructType);
 	name, typ, tag, offset = st.Field(0);
 	assert(typ.String(), "chan *int32");
 	name, typ, tag, offset = st.Field(1);
 	assert(typ.String(), "float32");

 	t = ParseTypeString("", "interface {a() *int}");
 	assert(t.String(), "interface {a() *int}");

 	t = ParseTypeString("", "func(a int8, b int32)");
 	assert(t.String(), "func(a int8, b int32)");

 	t = ParseTypeString("", "func(a int8, b int32) float");
 	assert(t.String(), "func(a int8, b int32) float");

 	t = ParseTypeString("", "func(a int8, b int32) (a float, b float)");
 	assert(t.String(), "func(a int8, b int32) (a float, b float)");

 	t = ParseTypeString("", "[32]int32");
 	assert(t.String(), "[32]int32");
 	at = t.(ArrayType);
 	assert(at.Elem().String(), "int32");

 	t = ParseTypeString("", "map[string]*int32");
 	assert(t.String(), "map[string]*int32");
 	mt = t.(MapType);
 	assert(mt.Key().String(), "string");
 	assert(mt.Elem().String(), "*int32");

 	t = ParseTypeString("", "chan<-string");
 	assert(t.String(), "chan<-string");
 	ct = t.(ChanType);
 	assert(ct.Elem().String(), "string");

 	// make sure tag strings are not part of element type
 	t = ParseTypeString("", "struct{d []uint32 \"TAG\"}");
 	st = t.(StructType);
 	name, typ, tag, offset = st.Field(0);
 	assert(typ.String(), "[]uint32");

 	t = ParseTypeString("", "[]int32");
 	v := NewSliceValue(t.(ArrayType), 5, 10);
 	t1 := ParseTypeString("", "*[]int32");
 	v1 := NewZeroValue(t1);
 	if v1 == nil { panic("V1 is nil"); }
 	v1.(PtrValue).SetSub(v);
 	a := v1.Interface().(*[]int32);
 	println(&a, len(a), cap(a));
 	for i := 0; i < len(a); i++ {
 		v.Elem(i).(Int32Value).Set(int32(i));
 	}
 	for i := 0; i < len(a); i++ {
 		println(a[i]);
 	}
 }

 func TestInterfaceGet(t *testing.T) {
 	var inter struct { e interface{ } };
 	inter.e = 123.456;
 	v1 := NewValue(&inter);
 	v2 := v1.(PtrValue).Sub().(StructValue).Field(0);
 	assert(v2.Type().String(), "interface { }");
 	i2 := v2.(InterfaceValue).Get();
 	v3 := NewValue(i2);
 	assert(v3.Type().String(), "float");
 }

 func TestInterfaceValue(t *testing.T) {
 	var inter struct { e interface{ } };
 	inter.e = 123.456;
 	v1 := NewValue(&inter);
 	v2 := v1.(PtrValue).Sub().(StructValue).Field(0);
 	assert(v2.Type().String(), "interface { }");
 	v3 := v2.(InterfaceValue).Value();
 	assert(v3.Type().String(), "float");

 	i3 := v2.Interface();
 	if f, ok := i3.(float); !ok {
 		a, typ, c := unsafe.Reflect(i3);
 		t.Error("v2.Interface() did not return float, got ", typ);
 	}
 }

 func TestFunctionValue(t *testing.T) {
 	v := NewValue(func() {});
 	if v.Interface() != v.Interface() {
 		t.Fatalf("TestFunction != itself");
 	}
 	assert(v.Type().String(), "func()");
 }

 func TestCopyArray(t *testing.T) {
 	a := []int{ 1, 2, 3, 4, 10, 9, 8, 7 };
 	b := []int{ 11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44 };
 	c := []int{ 11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44 };
 	va := NewValue(&a);
 	vb := NewValue(&b);
 	for i := 0; i < len(b); i++ {
 		if b[i] != c[i] {
 			t.Fatalf("b != c before test");
 		}
 	}
 	for tocopy := 1; tocopy <= 7; tocopy++ {
 		vb.(PtrValue).Sub().(ArrayValue).CopyFrom(va.(PtrValue).Sub().(ArrayValue), tocopy);
 		for i := 0; i < tocopy; i++ {
 			if a[i] != b[i] {
 				t.Errorf("1 tocopy=%d a[%d]=%d, b[%d]=%d",
 					tocopy, i, a[i], i, b[i]);
 			}
 		}
 		for i := tocopy; i < len(b); i++ {
 			if b[i] != c[i] {
 				if i < len(a) {
 					t.Errorf("2 tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d",
 						tocopy, i, a[i], i, b[i], i, c[i]);
 				} else {
 					t.Errorf("3 tocopy=%d b[%d]=%d, c[%d]=%d",
 						tocopy, i, b[i], i, c[i]);
 				}
 			} else {
 				t.Logf("tocopy=%d elem %d is okay\n", tocopy, i);
 			}
 		}
 	}
 }

 func TestBigUnnamedStruct(t *testing.T) {
 	b := struct{a,b,c,d int64}{1, 2, 3, 4};
 	v := NewValue(b);
 	b1 := v.Interface().(struct{a,b,c,d int64});
 	if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d {
 		t.Errorf("NewValue(%v).Interface().(Big) = %v", b, b1);
 	}
 }

 type big struct {
 	a, b, c, d, e int64
 }
 func TestBigStruct(t *testing.T) {
 	b := big{1, 2, 3, 4, 5};
 	v := NewValue(b);
 	b1 := v.Interface().(big);
 	if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e {
 		t.Errorf("NewValue(%v).Interface().(big) = %v", b, b1);
 	}
 }

 type Basic struct {
 	x int;
 	y float32
 }

 type NotBasic Basic

 type Recursive struct {
 	x int;
 	r *Recursive
 }

 type Complex struct {
 	a int;
 	b [3]*Complex;
 	c *string;
 	d map[float]float
 }

 type DeepEqualTest struct {
 	a, b interface{};
 	eq bool;
 }

 var deepEqualTests = []DeepEqualTest {
 	// Equalities
 	DeepEqualTest{ 1, 1, true },
 	DeepEqualTest{ int32(1), int32(1), true },
 	DeepEqualTest{ 0.5, 0.5, true },
 	DeepEqualTest{ float32(0.5), float32(0.5), true },
 	DeepEqualTest{ "hello", "hello", true },
 	DeepEqualTest{ make([]int, 10), make([]int, 10), true },
 	DeepEqualTest{ &[3]int{ 1, 2, 3 }, &[3]int{ 1, 2, 3 }, true },
 	DeepEqualTest{ Basic{ 1, 0.5 }, Basic{ 1, 0.5 }, true },
 	// Inequalities
 	DeepEqualTest{ 1, 2, false },
 	DeepEqualTest{ int32(1), int32(2), false },
 	DeepEqualTest{ 0.5, 0.6, false },
 	DeepEqualTest{ float32(0.5), float32(0.6), false },
 	DeepEqualTest{ "hello", "hey", false },
 	DeepEqualTest{ make([]int, 10), make([]int, 11), false },
 	DeepEqualTest{ &[3]int{ 1, 2, 3 }, &[3]int{ 1, 2, 4 }, false },
 	DeepEqualTest{ Basic{ 1, 0.5 }, Basic{ 1, 0.6 }, false },
 	// Mismatched types
 	DeepEqualTest{ 1, 1.0, false },
 	DeepEqualTest{ int32(1), int64(1), false },
 	DeepEqualTest{ 0.5, "hello", false },
 	DeepEqualTest{ []int{ 1, 2, 3 }, [3]int{ 1, 2, 3 }, false },
 	DeepEqualTest{ &[3]interface{} { 1, 2, 4 }, &[3]interface{} { 1, 2, "s" }, false },
 	DeepEqualTest{ Basic{ 1, 0.5 }, NotBasic{ 1, 0.5 }, false },
 }

 func TestDeepEqual(t *testing.T) {
 	for i, test := range deepEqualTests {
 		if r := DeepEqual(test.a, test.b); r != test.eq {
 			t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq);
 		}
 	}
 }

 func TestDeepEqualRecursiveStruct(t *testing.T) {
 	a, b := new(Recursive), new(Recursive);
 	*a = Recursive{ 12, a };
 	*b = Recursive{ 12, b };
 	if !DeepEqual(a, b) {
 		t.Error("DeepEqual(recursive same) = false, want true");
 	}
 }

 func TestDeepEqualComplexStruct(t *testing.T) {
 	m := make(map[float]float);
 	stra, strb := "hello", "hello";
 	a, b := new(Complex), new(Complex);
 	*a = Complex{5, [3]*Complex{a, b, a}, &stra, m};
 	*b = Complex{5, [3]*Complex{b, a, a}, &strb, m};
 	if !DeepEqual(a, b) {
 		t.Error("DeepEqual(complex same) = false, want true");
 	}
 }

 func TestDeepEqualComplexStructInequality(t *testing.T) {
 	m := make(map[float]float);
 	stra, strb := "hello", "helloo";  // Difference is here
 	a, b := new(Complex), new(Complex);
 	*a = Complex{5, [3]*Complex{a, b, a}, &stra, m};
 	*b = Complex{5, [3]*Complex{b, a, a}, &strb, m};
 	if DeepEqual(a, b) {
 		t.Error("DeepEqual(complex different) = true, want false");
 	}
 }


 func check2ndField(x interface{}, offs uintptr, t *testing.T) {
 	s := NewValue(x).(StructValue);
 	name, ftype, tag, reflect_offset := s.Type().(StructType).Field(1);
 	if uintptr(reflect_offset) != offs {
 		t.Error("mismatched offsets in structure alignment:", reflect_offset, offs);
 	}
 }

 // Check that structure alignment & offsets viewed through reflect agree with those
 // from the compiler itself.
 func TestAlignment(t *testing.T) {
 	type T1inner struct {
 		a int
 	}
 	type T1 struct {
 		T1inner;
 		f int;
 	}
 	type T2inner struct {
 		a, b int
 	}
 	type T2 struct {
 		T2inner;
 		f int;
 	}

 	x := T1{T1inner{2}, 17};
 	check2ndField(x, uintptr(unsafe.Pointer(&x.f)) - uintptr(unsafe.Pointer(&x)), t);

 	x1 := T2{T2inner{2, 3}, 17};
 	check2ndField(x1, uintptr(unsafe.Pointer(&x1.f)) - uintptr(unsafe.Pointer(&x1)), t);
 }

 type Nillable interface {
 	IsNil() bool
 }

 func Nil(a interface{}, t *testing.T) {
 	n := NewValue(a).(Nillable);
 	if !n.IsNil() {
 		t.Errorf("%v should be nil", a)
 	}
 }

 func NotNil(a interface{}, t *testing.T) {
 	n := NewValue(a).(Nillable);
 	if n.IsNil() {
 		t.Errorf("value of type %v should not be nil", NewValue(a).Type().String())
 	}
 }

 func TestIsNil(t *testing.T) {
 	// These do not implement IsNil
 	doNotNil := []string{"int", "float32", "struct { a int }"};
 	// These do implement IsNil
 	doNil := []string{"*int", "interface{}", "map[string]int", "func() bool", "chan int", "[]string"};
 	for i, ts := range doNotNil {
 		ty := ParseTypeString("", ts);
 		v := NewZeroValue(ty);
 		if nilable, ok := v.(Nillable); ok {
 			t.Errorf("%s is nilable; should not be", ts)
 		}
 	}

 	for i, ts := range doNil {
 		ty := ParseTypeString("", ts);
 		v := NewZeroValue(ty);
 		if nilable, ok := v.(Nillable); !ok {
 			t.Errorf("%s %T is not nilable; should be", ts, v)
 		}
 	}
 	// Check the implementations
 	var pi *int;
 	Nil(pi, t);
 	pi = new(int);
 	NotNil(pi, t);

 	var si []int;
 	Nil(si, t);
 	si = make([]int, 10);
 	NotNil(si, t);

 	// TODO: map and chan don't work yet

 	var ii interface {};
 	Nil(ii, t);
 	ii = pi;
 	NotNil(ii, t);

 	var fi func(t *testing.T);
 	Nil(fi, t);
 	fi = TestIsNil;
 	NotNil(fi, t);
 }

 func TestInterfaceExtraction(t *testing.T) {
 	var s struct {
 		w io.Writer;
 	}

 	s.w = os.Stdout;
 	v := Indirect(NewValue(&s)).(StructValue).Field(0).Interface();
 	if v != s.w.(interface{}) {
 		t.Errorf("Interface() on interface: ", v, s.w);
 	}
 }

 func TestInterfaceEditing(t *testing.T) {
 	// strings are bigger than one word,
 	// so the interface conversion allocates
 	// memory to hold a string and puts that
 	// pointer in the interface.
 	var i interface{} = "hello";

 	// if i pass the interface value by value
 	// to NewValue, i should get a fresh copy
 	// of the value.
 	v := NewValue(i);

 	// and setting that copy to "bye" should
 	// not change the value stored in i.
 	v.(StringValue).Set("bye");
 	if i.(string) != "hello" {
 		t.Errorf(`Set("bye") changed i to %s`, i.(string));
 	}

 	// the same should be true of smaller items.
 	i = 123;
 	v = NewValue(i);
 	v.(IntValue).Set(234);
 	if i.(int) != 123 {
 		t.Errorf("Set(234) changed i to %d", i.(int));
 	}
 }
	// Copyright 2009 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package reflect

	import (
	"io";
	"os";
	"reflect";
	"testing";
	"unsafe";
	)

	var doprint bool = false

	func is_digit(c uint8) bool {
	return '0' <= c && c <= '9'
	}

	// streq, but '@' in t matches a string of digits
	func match(s, t string) bool {
	for i, j := 0, 0; i < len(s) && j < len(t); i, j = i+1, j+1 {
	if s[i] == t[j] {
	continue
	}
	if is_digit(s[i]) && t[j] == '@' {
	for is_digit(s[i+1]) {
	i++
	}
	} else {
	return false
	}
	}
	return true;
	}

	func assert(s, t string) {
	if doprint {
	println(t)
	}
	if !match(s, t) {
	panicln(s, t)
	}
	}

	func typedump(s, t string) {
	typ := ParseTypeString("", s);
	assert(typeToString(typ, true), t);
	}

	func valuedump(s, t string) {
	typ := ParseTypeString("", s);
	v := NewZeroValue(typ);
	if v == nil {
	panicln("valuedump", s);
	}
	switch v.Kind() {
	case IntKind:
	v.(IntValue).Set(132);
	case Int8Kind:
	v.(Int8Value).Set(8);
	case Int16Kind:
	v.(Int16Value).Set(16);
	case Int32Kind:
	v.(Int32Value).Set(32);
	case Int64Kind:
	v.(Int64Value).Set(64);
	case UintKind:
	v.(UintValue).Set(132);
	case Uint8Kind:
	v.(Uint8Value).Set(8);
	case Uint16Kind:
	v.(Uint16Value).Set(16);
	case Uint32Kind:
	v.(Uint32Value).Set(32);
	case Uint64Kind:
	v.(Uint64Value).Set(64);
	case FloatKind:
	v.(FloatValue).Set(3200.0);
	case Float32Kind:
	v.(Float32Value).Set(32.1);
	case Float64Kind:
	v.(Float64Value).Set(64.2);
	case StringKind:
	v.(StringValue).Set("stringy cheese");
	case BoolKind:
	v.(BoolValue).Set(true);
	}
	assert(valueToString(v), t);
	}

	type T struct { a int; b float64; c string; d *int }

	func TestAll(tt *testing.T) { // TODO(r): wrap up better
	var s string;
	var t Type;

	// Types
	typedump("missing", "$missing$");
	typedump("int", "int");
	typedump("int8", "int8");
	typedump("int16", "int16");
	typedump("int32", "int32");
	typedump("int64", "int64");
	typedump("uint", "uint");
	typedump("uint8", "uint8");
	typedump("uint16", "uint16");
	typedump("uint32", "uint32");
	typedump("uint64", "uint64");
	typedump("float", "float");
	typedump("float32", "float32");
	typedump("float64", "float64");
	typedump("int8", "int8");
	typedump("whoknows.whatsthis", "$missing$");
	typedump("int8", "int8");
	typedump("P.integer", "P.integer");
	typedump("[32]int32", "[32]int32");
	typedump("[]int8", "[]int8");
	typedump("map[string]int32", "map[string]int32");
	typedump("chan<-string", "chan<-string");
	typedump("struct {c chan int32; d float32}", "struct{c chanint32; d float32}");
	typedump("func(a int8, b int32)", "func(a int8, b int32)");
	typedump("struct {c func(? chan P.integer, ? int8)}", "struct{c func(chanP.integer, int8)}");
	typedump("struct {a int8; b int32}", "struct{a int8; b int32}");
	typedump("struct {a int8; b int8; b int32}", "struct{a int8; b int8; b int32}");
	typedump("struct {a int8; b int8; c int8; b int32}", "struct{a int8; b int8; c int8; b int32}");
	typedump("struct {a int8; b int8; c int8; d int8; b int32}", "struct{a int8; b int8; c int8; d int8; b int32}");
	typedump("struct {a int8; b int8; c int8; d int8; e int8; b int32}", "struct{a int8; b int8; c int8; d int8; e int8; b int32}");
	typedump("struct {a int8 \"hi there\"; }", "struct{a int8 \"hi there\"}");
	typedump("struct {a int8 \"hi \\x00there\\t\\n\\\"\\\\\"; }", "struct{a int8 \"hi \\x00there\\t\\n\\\"\\\\\"}");
	typedump("struct {f func(args ...)}", "struct{f func(args ...)}");
	typedump("interface { a(? func(? func(? int) int) func(? func(? int)) int); b() }", "interface{a (func(func(int)(int))(func(func(int))(int))); b ()}");

	// Values
	valuedump("int8", "8");
	valuedump("int16", "16");
	valuedump("int32", "32");
	valuedump("int64", "64");
	valuedump("uint8", "8");
	valuedump("uint16", "16");
	valuedump("uint32", "32");
	valuedump("uint64", "64");
	valuedump("float32", "32.1");
	valuedump("float64", "64.2");
	valuedump("string", "stringy cheese");
	valuedump("bool", "true");
	valuedump("int8", "int8(0)");
	valuedump("int8", "int8(0)");
	valuedump("[5]int32", "[5]int32{0, 0, 0, 0, 0}");
	valuedump("P.integer", "P.integer(0)");
	valuedump("map[string]int32", "map[string]int32{<can't iterate on maps>}");
	valuedump("chan<-string", "chan<-string");
	valuedump("struct {c chan int32; d float32}", "struct{c chanint32; d float32}{chan*int32, 0}");
	valuedump("func(a int8, b int32)", "func(a int8, b int32)(0)");
	valuedump("struct {c func(? chan P.integer, ? int8)}", "struct{c func(chanP.integer, int8)}{func(chanP.integer, int8)(0)}");
	valuedump("struct {a int8; b int32}", "struct{a int8; b int32}{0, 0}");
	valuedump("struct {a int8; b int8; b int32}", "struct{a int8; b int8; b int32}{0, 0, 0}");

	{ var tmp = 123;
	value := NewValue(tmp);
	assert(valueToString(value), "123");
	}
	{ var tmp = 123.4;
	value := NewValue(tmp);
	assert(valueToString(value), "123.4");
	}
	{
	var tmp = byte(123);
	value := NewValue(tmp);
	assert(valueToString(value), "123");
	assert(typeToString(value.Type(), false), "uint8");
	}
	{ var tmp = "abc";
	value := NewValue(tmp);
	assert(valueToString(value), "abc");
	}
	{
	var i int = 7;
	var tmp = &T{123, 456.75, "hello", &i};
	value := NewValue(tmp);
	assert(valueToString(value.(PtrValue).Sub()), "reflect.T{123, 456.75, hello, *int(@)}");
	}
	{
	type C chan *T; // TODO: should not be necessary
	var tmp = new(C);
	value := NewValue(tmp);
	assert(valueToString(value), "*reflect.C·all_test(@)");
	}
	// {
	// type A [10]int;
	// var tmp A = A{1,2,3,4,5,6,7,8,9,10};
	// value := NewValue(&tmp);
	// assert(valueToString(value.(PtrValue).Sub()), "reflect.A·all_test{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}");
	// value.(PtrValue).Sub().(ArrayValue).Elem(4).(IntValue).Set(123);
	// assert(valueToString(value.(PtrValue).Sub()), "reflect.A·all_test{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}");
	// }
	{
	type AA []int;
	var tmp = AA{1,2,3,4,5,6,7,8,9,10};
	value := NewValue(&tmp); // TODO: NewValue(tmp) too
	assert(valueToString(value.(PtrValue).Sub()), "reflect.AA·all_test{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}");
	value.(PtrValue).Sub().(ArrayValue).Elem(4).(IntValue).Set(123);
	assert(valueToString(value.(PtrValue).Sub()), "reflect.AA·all_test{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}");
	}

	{
	var ip *int32;
	var i int32 = 1234;
	vip := NewValue(&ip);
	vi := NewValue(i);
	vip.(PtrValue).Sub().(PtrValue).SetSub(vi);
	if *ip != 1234 {
	panicln("SetSub failure", *ip);
	}
	}

	var pt PtrType;
	var st StructType;
	var mt MapType;
	var at ArrayType;
	var ct ChanType;
	var name string;
	var typ Type;
	var tag string;
	var offset int;

	// Type strings
	t = ParseTypeString("", "int8");
	assert(t.String(), "int8");

	t = ParseTypeString("", "*int8");
	assert(t.String(), "*int8");
	pt = t.(PtrType);
	assert(pt.Sub().String(), "int8");

	t = ParseTypeString("", "struct {c chan int32; d float32}");
	assert(t.String(), "struct {c chan int32; d float32}");
	pt = t.(PtrType);
	assert(pt.Sub().String(), "struct {c chan *int32; d float32}");
	st = pt.Sub().(StructType);
	name, typ, tag, offset = st.Field(0);
	assert(typ.String(), "chan *int32");
	name, typ, tag, offset = st.Field(1);
	assert(typ.String(), "float32");

	t = ParseTypeString("", "interface {a() *int}");
	assert(t.String(), "interface {a() *int}");

	t = ParseTypeString("", "func(a int8, b int32)");
	assert(t.String(), "func(a int8, b int32)");

	t = ParseTypeString("", "func(a int8, b int32) float");
	assert(t.String(), "func(a int8, b int32) float");

	t = ParseTypeString("", "func(a int8, b int32) (a float, b float)");
	assert(t.String(), "func(a int8, b int32) (a float, b float)");

	t = ParseTypeString("", "[32]int32");
	assert(t.String(), "[32]int32");
	at = t.(ArrayType);
	assert(at.Elem().String(), "int32");

	t = ParseTypeString("", "map[string]*int32");
	assert(t.String(), "map[string]*int32");
	mt = t.(MapType);
	assert(mt.Key().String(), "string");
	assert(mt.Elem().String(), "*int32");

	t = ParseTypeString("", "chan<-string");
	assert(t.String(), "chan<-string");
	ct = t.(ChanType);
	assert(ct.Elem().String(), "string");

	// make sure tag strings are not part of element type
	t = ParseTypeString("", "struct{d []uint32 \"TAG\"}");
	st = t.(StructType);
	name, typ, tag, offset = st.Field(0);
	assert(typ.String(), "[]uint32");

	t = ParseTypeString("", "[]int32");
	v := NewSliceValue(t.(ArrayType), 5, 10);
	t1 := ParseTypeString("", "*[]int32");
	v1 := NewZeroValue(t1);
	if v1 == nil { panic("V1 is nil"); }
	v1.(PtrValue).SetSub(v);
	a := v1.Interface().(*[]int32);
	println(&a, len(a), cap(a));
	for i := 0; i < len(a); i++ {
	v.Elem(i).(Int32Value).Set(int32(i));
	}
	for i := 0; i < len(a); i++ {
	println(a[i]);
	}
	}

	func TestInterfaceGet(t *testing.T) {
	var inter struct { e interface{ } };
	inter.e = 123.456;
	v1 := NewValue(&inter);
	v2 := v1.(PtrValue).Sub().(StructValue).Field(0);
	assert(v2.Type().String(), "interface { }");
	i2 := v2.(InterfaceValue).Get();
	v3 := NewValue(i2);
	assert(v3.Type().String(), "float");
	}

	func TestInterfaceValue(t *testing.T) {
	var inter struct { e interface{ } };
	inter.e = 123.456;
	v1 := NewValue(&inter);
	v2 := v1.(PtrValue).Sub().(StructValue).Field(0);
	assert(v2.Type().String(), "interface { }");
	v3 := v2.(InterfaceValue).Value();
	assert(v3.Type().String(), "float");

	i3 := v2.Interface();
	if f, ok := i3.(float); !ok {
	a, typ, c := unsafe.Reflect(i3);
	t.Error("v2.Interface() did not return float, got ", typ);
	}
	}

	func TestFunctionValue(t *testing.T) {
	v := NewValue(func() {});
	if v.Interface() != v.Interface() {
	t.Fatalf("TestFunction != itself");
	}
	assert(v.Type().String(), "func()");
	}

	func TestCopyArray(t *testing.T) {
	a := []int{ 1, 2, 3, 4, 10, 9, 8, 7 };
	b := []int{ 11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44 };
	c := []int{ 11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44 };
	va := NewValue(&a);
	vb := NewValue(&b);
	for i := 0; i < len(b); i++ {
	if b[i] != c[i] {
	t.Fatalf("b != c before test");
	}
	}
	for tocopy := 1; tocopy <= 7; tocopy++ {
	vb.(PtrValue).Sub().(ArrayValue).CopyFrom(va.(PtrValue).Sub().(ArrayValue), tocopy);
	for i := 0; i < tocopy; i++ {
	if a[i] != b[i] {
	t.Errorf("1 tocopy=%d a[%d]=%d, b[%d]=%d",
	tocopy, i, a[i], i, b[i]);
	}
	}
	for i := tocopy; i < len(b); i++ {
	if b[i] != c[i] {
	if i < len(a) {
	t.Errorf("2 tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d",
	tocopy, i, a[i], i, b[i], i, c[i]);
	} else {
	t.Errorf("3 tocopy=%d b[%d]=%d, c[%d]=%d",
	tocopy, i, b[i], i, c[i]);
	}
	} else {
	t.Logf("tocopy=%d elem %d is okay\n", tocopy, i);
	}
	}
	}
	}

	func TestBigUnnamedStruct(t *testing.T) {
	b := struct{a,b,c,d int64}{1, 2, 3, 4};
	v := NewValue(b);
	b1 := v.Interface().(struct{a,b,c,d int64});
	if b1.a != b.a \|\| b1.b != b.b \|\| b1.c != b.c \|\| b1.d != b.d {
	t.Errorf("NewValue(%v).Interface().(Big) = %v", b, b1);
	}
	}

	type big struct {
	a, b, c, d, e int64
	}
	func TestBigStruct(t *testing.T) {
	b := big{1, 2, 3, 4, 5};
	v := NewValue(b);
	b1 := v.Interface().(big);
	if b1.a != b.a \|\| b1.b != b.b \|\| b1.c != b.c \|\| b1.d != b.d \|\| b1.e != b.e {
	t.Errorf("NewValue(%v).Interface().(big) = %v", b, b1);
	}
	}

	type Basic struct {
	x int;
	y float32
	}

	type NotBasic Basic

	type Recursive struct {
	x int;
	r *Recursive
	}

	type Complex struct {
	a int;
	b [3]*Complex;
	c *string;
	d map[float]float
	}

	type DeepEqualTest struct {
	a, b interface{};
	eq bool;
	}

	var deepEqualTests = []DeepEqualTest {
	// Equalities
	DeepEqualTest{ 1, 1, true },
	DeepEqualTest{ int32(1), int32(1), true },
	DeepEqualTest{ 0.5, 0.5, true },
	DeepEqualTest{ float32(0.5), float32(0.5), true },
	DeepEqualTest{ "hello", "hello", true },
	DeepEqualTest{ make([]int, 10), make([]int, 10), true },
	DeepEqualTest{ &[3]int{ 1, 2, 3 }, &[3]int{ 1, 2, 3 }, true },
	DeepEqualTest{ Basic{ 1, 0.5 }, Basic{ 1, 0.5 }, true },
	// Inequalities
	DeepEqualTest{ 1, 2, false },
	DeepEqualTest{ int32(1), int32(2), false },
	DeepEqualTest{ 0.5, 0.6, false },
	DeepEqualTest{ float32(0.5), float32(0.6), false },
	DeepEqualTest{ "hello", "hey", false },
	DeepEqualTest{ make([]int, 10), make([]int, 11), false },
	DeepEqualTest{ &[3]int{ 1, 2, 3 }, &[3]int{ 1, 2, 4 }, false },
	DeepEqualTest{ Basic{ 1, 0.5 }, Basic{ 1, 0.6 }, false },
	// Mismatched types
	DeepEqualTest{ 1, 1.0, false },
	DeepEqualTest{ int32(1), int64(1), false },
	DeepEqualTest{ 0.5, "hello", false },
	DeepEqualTest{ []int{ 1, 2, 3 }, [3]int{ 1, 2, 3 }, false },
	DeepEqualTest{ &[3]interface{} { 1, 2, 4 }, &[3]interface{} { 1, 2, "s" }, false },
	DeepEqualTest{ Basic{ 1, 0.5 }, NotBasic{ 1, 0.5 }, false },
	}

	func TestDeepEqual(t *testing.T) {
	for i, test := range deepEqualTests {
	if r := DeepEqual(test.a, test.b); r != test.eq {
	t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq);
	}
	}
	}

	func TestDeepEqualRecursiveStruct(t *testing.T) {
	a, b := new(Recursive), new(Recursive);
	*a = Recursive{ 12, a };
	*b = Recursive{ 12, b };
	if !DeepEqual(a, b) {
	t.Error("DeepEqual(recursive same) = false, want true");
	}
	}

	func TestDeepEqualComplexStruct(t *testing.T) {
	m := make(map[float]float);
	stra, strb := "hello", "hello";
	a, b := new(Complex), new(Complex);
	a = Complex{5, [3]Complex{a, b, a}, &stra, m};
	b = Complex{5, [3]Complex{b, a, a}, &strb, m};
	if !DeepEqual(a, b) {
	t.Error("DeepEqual(complex same) = false, want true");
	}
	}

	func TestDeepEqualComplexStructInequality(t *testing.T) {
	m := make(map[float]float);
	stra, strb := "hello", "helloo"; // Difference is here
	a, b := new(Complex), new(Complex);
	a = Complex{5, [3]Complex{a, b, a}, &stra, m};
	b = Complex{5, [3]Complex{b, a, a}, &strb, m};
	if DeepEqual(a, b) {
	t.Error("DeepEqual(complex different) = true, want false");
	}
	}


	func check2ndField(x interface{}, offs uintptr, t *testing.T) {
	s := NewValue(x).(StructValue);
	name, ftype, tag, reflect_offset := s.Type().(StructType).Field(1);
	if uintptr(reflect_offset) != offs {
	t.Error("mismatched offsets in structure alignment:", reflect_offset, offs);
	}
	}

	// Check that structure alignment & offsets viewed through reflect agree with those
	// from the compiler itself.
	func TestAlignment(t *testing.T) {
	type T1inner struct {
	a int
	}
	type T1 struct {
	T1inner;
	f int;
	}
	type T2inner struct {
	a, b int
	}
	type T2 struct {
	T2inner;
	f int;
	}

	x := T1{T1inner{2}, 17};
	check2ndField(x, uintptr(unsafe.Pointer(&x.f)) - uintptr(unsafe.Pointer(&x)), t);

	x1 := T2{T2inner{2, 3}, 17};
	check2ndField(x1, uintptr(unsafe.Pointer(&x1.f)) - uintptr(unsafe.Pointer(&x1)), t);
	}

	type Nillable interface {
	IsNil() bool
	}

	func Nil(a interface{}, t *testing.T) {
	n := NewValue(a).(Nillable);
	if !n.IsNil() {
	t.Errorf("%v should be nil", a)
	}
	}

	func NotNil(a interface{}, t *testing.T) {
	n := NewValue(a).(Nillable);
	if n.IsNil() {
	t.Errorf("value of type %v should not be nil", NewValue(a).Type().String())
	}
	}

	func TestIsNil(t *testing.T) {
	// These do not implement IsNil
	doNotNil := []string{"int", "float32", "struct { a int }"};
	// These do implement IsNil
	doNil := []string{"*int", "interface{}", "map[string]int", "func() bool", "chan int", "[]string"};
	for i, ts := range doNotNil {
	ty := ParseTypeString("", ts);
	v := NewZeroValue(ty);
	if nilable, ok := v.(Nillable); ok {
	t.Errorf("%s is nilable; should not be", ts)
	}
	}

	for i, ts := range doNil {
	ty := ParseTypeString("", ts);
	v := NewZeroValue(ty);
	if nilable, ok := v.(Nillable); !ok {
	t.Errorf("%s %T is not nilable; should be", ts, v)
	}
	}
	// Check the implementations
	var pi *int;
	Nil(pi, t);
	pi = new(int);
	NotNil(pi, t);

	var si []int;
	Nil(si, t);
	si = make([]int, 10);
	NotNil(si, t);

	// TODO: map and chan don't work yet

	var ii interface {};
	Nil(ii, t);
	ii = pi;
	NotNil(ii, t);

	var fi func(t *testing.T);
	Nil(fi, t);
	fi = TestIsNil;
	NotNil(fi, t);
	}

	func TestInterfaceExtraction(t *testing.T) {
	var s struct {
	w io.Writer;
	}

	s.w = os.Stdout;
	v := Indirect(NewValue(&s)).(StructValue).Field(0).Interface();
	if v != s.w.(interface{}) {
	t.Errorf("Interface() on interface: ", v, s.w);
	}
	}

	func TestInterfaceEditing(t *testing.T) {
	// strings are bigger than one word,
	// so the interface conversion allocates
	// memory to hold a string and puts that
	// pointer in the interface.
	var i interface{} = "hello";

	// if i pass the interface value by value
	// to NewValue, i should get a fresh copy
	// of the value.
	v := NewValue(i);

	// and setting that copy to "bye" should
	// not change the value stored in i.
	v.(StringValue).Set("bye");
	if i.(string) != "hello" {
	t.Errorf(`Set("bye") changed i to %s`, i.(string));
	}

	// the same should be true of smaller items.
	i = 123;
	v = NewValue(i);
	v.(IntValue).Set(234);
	if i.(int) != 123 {
	t.Errorf("Set(234) changed i to %d", i.(int));
	}
	}