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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /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.go | 96 |
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" +} |