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Add SetValue(Value) to the Value interface.

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R=rsc
APPROVED=rsc
DELTA=172  (170 added, 0 deleted, 2 changed)
OCL=35969
CL=35980
This commit is contained in:
Adam Langley 2009-10-21 19:51:27 -07:00
parent f1b91263d8
commit a8a678fc2a
2 changed files with 172 additions and 2 deletions
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44
src/pkg/reflect/all_test.go
View File

@ -108,7 +108,7 @@ func TestTypes(t *testing.T) {
}
}
func TestValue(t *testing.T) {
func TestSet(t *testing.T) {
for i, tt := range valueTests {
v := NewValue(tt.i);
switch v := v.(type) {
@ -150,6 +150,48 @@ func TestValue(t *testing.T) {
}
}
func TestSetValue(t *testing.T) {
for i, tt := range valueTests {
v := NewValue(tt.i);
switch v := v.(type) {
case *IntValue:
v.SetValue(NewValue(int(132)));
case *Int8Value:
v.SetValue(NewValue(int8(8)));
case *Int16Value:
v.SetValue(NewValue(int16(16)));
case *Int32Value:
v.SetValue(NewValue(int32(32)));
case *Int64Value:
v.SetValue(NewValue(int64(64)));
case *UintValue:
v.SetValue(NewValue(uint(132)));
case *Uint8Value:
v.SetValue(NewValue(uint8(8)));
case *Uint16Value:
v.SetValue(NewValue(uint16(16)));
case *Uint32Value:
v.SetValue(NewValue(uint32(32)));
case *Uint64Value:
v.SetValue(NewValue(uint64(64)));
case *FloatValue:
v.SetValue(NewValue(float(3200.0)));
case *Float32Value:
v.SetValue(NewValue(float32(32.1)));
case *Float64Value:
v.SetValue(NewValue(float64(64.2)));
case *StringValue:
v.SetValue(NewValue("stringy cheese"));
case *BoolValue:
v.SetValue(NewValue(true));
}
s := valueToString(v);
if s != tt.s {
t.Errorf("#%d: have %#q, want %#q", i, s, tt.s);
}
}
}
var _i = 7;
var valueToStringTests = []pair {

130
src/pkg/reflect/value.go
View File

@ -56,6 +56,9 @@ type Value interface {
// will cause a crash.
CanSet() bool;
// SetValue assigns v to the value; v must have the same type as the value.
SetValue(v Value);
// Addr returns a pointer to the underlying data.
// It is for advanced clients that also
// import the "unsafe" package.
@ -130,6 +133,11 @@ func (v *BoolValue) Set(x bool) {
*(*bool)(v.addr) = x;
}
// Set sets v to the value x.
func (v *BoolValue) SetValue(x Value) {
v.Set(x.(*BoolValue).Get());
}
// FloatValue represents a float value.
type FloatValue struct {
value;
@ -148,6 +156,11 @@ func (v *FloatValue) Set(x float) {
*(*float)(v.addr) = x;
}
// Set sets v to the value x.
func (v *FloatValue) SetValue(x Value) {
v.Set(x.(*FloatValue).Get());
}
// Float32Value represents a float32 value.
type Float32Value struct {
value;
@ -166,6 +179,11 @@ func (v *Float32Value) Set(x float32) {
*(*float32)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Float32Value) SetValue(x Value) {
v.Set(x.(*Float32Value).Get());
}
// Float64Value represents a float64 value.
type Float64Value struct {
value;
@ -184,6 +202,11 @@ func (v *Float64Value) Set(x float64) {
*(*float64)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Float64Value) SetValue(x Value) {
v.Set(x.(*Float64Value).Get());
}
// IntValue represents an int value.
type IntValue struct {
value;
@ -202,6 +225,11 @@ func (v *IntValue) Set(x int) {
*(*int)(v.addr) = x;
}
// Set sets v to the value x.
func (v *IntValue) SetValue(x Value) {
v.Set(x.(*IntValue).Get());
}
// Int8Value represents an int8 value.
type Int8Value struct {
value;
@ -220,6 +248,11 @@ func (v *Int8Value) Set(x int8) {
*(*int8)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Int8Value) SetValue(x Value) {
v.Set(x.(*Int8Value).Get());
}
// Int16Value represents an int16 value.
type Int16Value struct {
value;
@ -238,6 +271,11 @@ func (v *Int16Value) Set(x int16) {
*(*int16)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Int16Value) SetValue(x Value) {
v.Set(x.(*Int16Value).Get());
}
// Int32Value represents an int32 value.
type Int32Value struct {
value;
@ -256,6 +294,11 @@ func (v *Int32Value) Set(x int32) {
*(*int32)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Int32Value) SetValue(x Value) {
v.Set(x.(*Int32Value).Get());
}
// Int64Value represents an int64 value.
type Int64Value struct {
value;
@ -274,6 +317,11 @@ func (v *Int64Value) Set(x int64) {
*(*int64)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Int64Value) SetValue(x Value) {
v.Set(x.(*Int64Value).Get());
}
// StringValue represents a string value.
type StringValue struct {
value;
@ -292,6 +340,11 @@ func (v *StringValue) Set(x string) {
*(*string)(v.addr) = x;
}
// Set sets v to the value x.
func (v *StringValue) SetValue(x Value) {
v.Set(x.(*StringValue).Get());
}
// UintValue represents a uint value.
type UintValue struct {
value;
@ -310,6 +363,11 @@ func (v *UintValue) Set(x uint) {
*(*uint)(v.addr) = x;
}
// Set sets v to the value x.
func (v *UintValue) SetValue(x Value) {
v.Set(x.(*UintValue).Get());
}
// Uint8Value represents a uint8 value.
type Uint8Value struct {
value;
@ -328,6 +386,11 @@ func (v *Uint8Value) Set(x uint8) {
*(*uint8)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Uint8Value) SetValue(x Value) {
v.Set(x.(*Uint8Value).Get());
}
// Uint16Value represents a uint16 value.
type Uint16Value struct {
value;
@ -346,6 +409,11 @@ func (v *Uint16Value) Set(x uint16) {
*(*uint16)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Uint16Value) SetValue(x Value) {
v.Set(x.(*Uint16Value).Get());
}
// Uint32Value represents a uint32 value.
type Uint32Value struct {
value;
@ -364,6 +432,11 @@ func (v *Uint32Value) Set(x uint32) {
*(*uint32)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Uint32Value) SetValue(x Value) {
v.Set(x.(*Uint32Value).Get());
}
// Uint64Value represents a uint64 value.
type Uint64Value struct {
value;
@ -382,6 +455,11 @@ func (v *Uint64Value) Set(x uint64) {
*(*uint64)(v.addr) = x;
}
// Set sets v to the value x.
func (v *Uint64Value) SetValue(x Value) {
v.Set(x.(*Uint64Value).Get());
}
// UintptrValue represents a uintptr value.
type UintptrValue struct {
value;
@ -400,6 +478,11 @@ func (v *UintptrValue) Set(x uintptr) {
*(*uintptr)(v.addr) = x;
}
// Set sets v to the value x.
func (v *UintptrValue) SetValue(x Value) {
v.Set(x.(*UintptrValue).Get());
}
// UnsafePointerValue represents an unsafe.Pointer value.
type UnsafePointerValue struct {
value;
@ -421,6 +504,11 @@ func (v *UnsafePointerValue) Set(x unsafe.Pointer) {
*(*unsafe.Pointer)(v.addr) = x;
}
// Set sets v to the value x.
func (v *UnsafePointerValue) SetValue(x Value) {
v.Set(unsafe.Pointer(x.(*UnsafePointerValue).Get()));
}
func typesMustMatch(t1, t2 Type) {
if t1 != t2 {
panicln("type mismatch:", t1.String(), "!=", t2.String());
@ -489,6 +577,11 @@ func (v *ArrayValue) Set(x *ArrayValue) {
ArrayCopy(v, x);
}
// Set sets v to the value x.
func (v *ArrayValue) SetValue(x Value) {
v.Set(x.(*ArrayValue));
}
// Elem returns the i'th element of v.
func (v *ArrayValue) Elem(i int) Value {
typ := v.typ.(*ArrayType).Elem();
@ -560,6 +653,11 @@ func (v *SliceValue) Set(x *SliceValue) {
*v.slice() = *x.slice();
}
// Set sets v to the value x.
func (v *SliceValue) SetValue(x Value) {
v.Set(x.(*SliceValue));
}
// Slice returns a sub-slice of the slice v.
func (v *SliceValue) Slice(beg, end int) *SliceValue {
cap := v.Cap();
@ -624,6 +722,11 @@ func (v *ChanValue) Set(x *ChanValue) {
*(*uintptr)(v.addr) = *(*uintptr)(x.addr);
}
// Set sets v to the value x.
func (v *ChanValue) SetValue(x Value) {
v.Set(x.(*ChanValue));
}
// Get returns the uintptr value of v.
// It is mainly useful for printing.
func (v *ChanValue) Get() uintptr {
@ -733,7 +836,7 @@ func MakeChan(typ *ChanType, buffer int) *ChanValue {
// A FuncValue represents a function value.
type FuncValue struct {
value;
first Value;
first *value;
isInterface bool;
}
@ -758,6 +861,11 @@ func (v *FuncValue) Set(x *FuncValue) {
*(*uintptr)(v.addr) = *(*uintptr)(x.addr);
}
// Set sets v to the value x.
func (v *FuncValue) SetValue(x Value) {
v.Set(x.(*FuncValue));
}
// Method returns a FuncValue corresponding to v's i'th method.
// The arguments to a Call on the returned FuncValue
// should not include a receiver; the FuncValue will use v
@ -923,6 +1031,11 @@ func (v *InterfaceValue) Set(x Value) {
setiface(t, &i, v.addr);
}
// Set sets v to the value x.
func (v *InterfaceValue) SetValue(x Value) {
v.Set(x);
}
// Method returns a FuncValue corresponding to v's i'th method.
// The arguments to a Call on the returned FuncValue
// should not include a receiver; the FuncValue will use v
@ -968,6 +1081,11 @@ func (v *MapValue) Set(x *MapValue) {
*(*uintptr)(v.addr) = *(*uintptr)(x.addr);
}
// Set sets v to the value x.
func (v *MapValue) SetValue(x Value) {
v.Set(x.(*MapValue));
}
// implemented in ../pkg/runtime/reflect.cgo
func mapaccess(m, key, val *byte) bool
func mapassign(m, key, val *byte)
@ -1078,6 +1196,11 @@ func (v *PtrValue) Set(x *PtrValue) {
*(*uintptr)(v.addr) = *(*uintptr)(x.addr);
}
// Set sets v to the value x.
func (v *PtrValue) SetValue(x Value) {
v.Set(x.(*PtrValue));
}
// PointTo changes v to point to x.
func (v *PtrValue) PointTo(x Value) {
if !x.CanSet() {
@ -1129,6 +1252,11 @@ func (v *StructValue) Set(x *StructValue) {
memmove(v.addr, x.addr, v.typ.Size());
}
// Set sets v to the value x.
func (v *StructValue) SetValue(x Value) {
v.Set(x.(*StructValue));
}
// Field returns the i'th field of the struct.
func (v *StructValue) Field(i int) Value {
t := v.typ.(*StructType);