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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libgo/go/reflect/tostring_test.go
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Diffstat (limited to 'libgo/go/reflect/tostring_test.go')
-rw-r--r--libgo/go/reflect/tostring_test.go96
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"
+}