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// 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.
// Reflection library.
// Formatting of reflection types and values for debugging.
// Not defined as methods so they do not need to be linked into most binaries;
// the functions are not used by the library itself, only in tests.
package reflect
import (
"reflect";
"strconv";
)
// valueToString returns a textual representation of the reflection value val.
// For debugging only.
func valueToString(val Value) string {
var str string;
if val == nil {
return "<nil>";
}
typ := val.Type();
switch val := val.(type) {
case *IntValue:
return strconv.Uitoa64(uint64(val.Get()));
case *Int8Value:
return strconv.Itoa64(int64(val.Get()));
case *Int16Value:
return strconv.Itoa64(int64(val.Get()));
case *Int32Value:
return strconv.Itoa64(int64(val.Get()));
case *Int64Value:
return strconv.Itoa64(int64(val.Get()));
case *UintValue:
return strconv.Itoa64(int64(val.Get()));
case *Uint8Value:
return strconv.Itoa64(int64(val.Get()));
case *Uint16Value:
return strconv.Itoa64(int64(val.Get()));
case *Uint32Value:
return strconv.Itoa64(int64(val.Get()));
case *Uint64Value:
return strconv.Uitoa64(uint64(val.Get()));
case *FloatValue:
if strconv.FloatSize == 32 {
return strconv.Ftoa32(float32(val.Get()), 'g', -1);
} else {
return strconv.Ftoa64(float64(val.Get()), 'g', -1);
}
case *Float32Value:
return strconv.Ftoa32(val.Get(), 'g', -1);
case *Float64Value:
return strconv.Ftoa64(val.Get(), 'g', -1);
case *StringValue:
return val.Get();
case *BoolValue:
if val.Get() {
return "true"
} else {
return "false"
}
case *PtrValue:
v := val;
str = typ.String() + "(";
if v.IsNil() {
str += "0";
} else {
str += "&" + valueToString(v.Elem());
}
str += ")";
return str;
case ArrayOrSliceValue:
v := val;
str += typ.String();
str += "{";
for i := 0; i < v.Len(); i++ {
if i > 0 {
str += ", "
}
str += valueToString(v.Elem(i));
}
str += "}";
return str;
case *MapValue:
t := typ.(*MapType);
v := val;
str = t.String();
str += "{";
str += "<can't iterate on maps>";
str += "}";
return str;
case *ChanValue:
str = typ.String();
return str;
case *StructValue:
t := typ.(*StructType);
v := val;
str += t.String();
str += "{";
for i, n := 0, v.NumField(); i < n; i++ {
if i > 0 {
str += ", "
}
str += valueToString(v.Field(i));
}
str += "}";
return str;
case *InterfaceValue:
return typ.String() + "(" + valueToString(val.Elem()) + ")";
case *FuncValue:
v := val;
return typ.String() + "(" + strconv.Itoa64(int64(v.Get())) + ")";
default:
panicln("reflect.valueToString: can't print type ", typ.String());
}
return "reflect.valueToString: can't happen";
}
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