mirror of
https://github.com/golang/go
synced 2024-10-04 20:21:22 -06:00
45bdf0367e
update other code to match. R=r CC=golang-dev https://golang.org/cl/1680044
97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Formatting of reflection types and values for debugging.
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// Not defined as methods so they do not need to be linked into most binaries;
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// the functions are not used by the library itself, only in tests.
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package reflect_test
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import (
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. "reflect"
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"strconv"
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)
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// valueToString returns a textual representation of the reflection value val.
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// For debugging only.
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func valueToString(val Value) string {
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var str string
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if val == nil {
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return "<nil>"
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}
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typ := val.Type()
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switch val := val.(type) {
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case *IntValue:
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return strconv.Itoa64(val.Get())
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case *UintValue:
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return strconv.Uitoa64(val.Get())
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case *FloatValue:
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return strconv.Ftoa64(float64(val.Get()), 'g', -1)
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case *ComplexValue:
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c := val.Get()
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return strconv.Ftoa64(float64(real(c)), 'g', -1) + "+" + strconv.Ftoa64(float64(imag(c)), 'g', -1) + "i"
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case *StringValue:
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return val.Get()
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case *BoolValue:
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if val.Get() {
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return "true"
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} else {
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return "false"
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}
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case *PtrValue:
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v := val
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str = typ.String() + "("
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if v.IsNil() {
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str += "0"
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} else {
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str += "&" + valueToString(v.Elem())
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}
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str += ")"
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return str
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case ArrayOrSliceValue:
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v := val
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str += typ.String()
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str += "{"
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for i := 0; i < v.Len(); i++ {
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if i > 0 {
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str += ", "
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}
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str += valueToString(v.Elem(i))
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}
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str += "}"
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return str
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case *MapValue:
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t := typ.(*MapType)
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str = t.String()
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str += "{"
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str += "<can't iterate on maps>"
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str += "}"
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return str
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case *ChanValue:
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str = typ.String()
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return str
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case *StructValue:
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t := typ.(*StructType)
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v := val
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str += t.String()
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str += "{"
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for i, n := 0, v.NumField(); i < n; i++ {
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if i > 0 {
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str += ", "
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}
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str += valueToString(v.Field(i))
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}
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str += "}"
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return str
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case *InterfaceValue:
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return typ.String() + "(" + valueToString(val.Elem()) + ")"
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case *FuncValue:
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v := val
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return typ.String() + "(" + strconv.Itoa64(int64(v.Get())) + ")"
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default:
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panic("valueToString: can't print type " + typ.String())
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}
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return "valueToString: can't happen"
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}
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