1 files changed, 96 insertions, 0 deletions
diff --git a/libgo/go/reflect/tostring_test.go b/libgo/go/reflect/tostring_test.go
new file mode 100644
index 000000000..a1487fdd2
--- /dev/null
+++ b/libgo/go/reflect/tostring_test.go
@@ -0,0 +1,96 @@
+// 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.
+
+// 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_test
+
+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.Itoa64(val.Get())
+	case *UintValue:
+		return strconv.Uitoa64(val.Get())
+	case *FloatValue:
+		return strconv.Ftoa64(float64(val.Get()), 'g', -1)
+	case *ComplexValue:
+		c := val.Get()
+		return strconv.Ftoa64(float64(real(c)), 'g', -1) + "+" + strconv.Ftoa64(float64(imag(c)), 'g', -1) + "i"
+	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)
+		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:
+		panic("valueToString: can't print type " + typ.String())
+	}
+	return "valueToString: can't happen"
+}