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1 // Copyright 2018 The Go Authors. All rights reserved. |
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2 // Use of this source code is governed by a BSD-style |
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3 // license that can be found in the LICENSE file. |
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4 |
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5 package impl |
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6 |
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7 import ( |
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8 "fmt" |
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9 "reflect" |
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10 "strings" |
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11 "sync" |
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12 |
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13 "google.golang.org/protobuf/internal/descopts" |
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14 ptag "google.golang.org/protobuf/internal/encoding/tag" |
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15 "google.golang.org/protobuf/internal/errors" |
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16 "google.golang.org/protobuf/internal/filedesc" |
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17 "google.golang.org/protobuf/internal/strs" |
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18 "google.golang.org/protobuf/reflect/protoreflect" |
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19 pref "google.golang.org/protobuf/reflect/protoreflect" |
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20 "google.golang.org/protobuf/runtime/protoiface" |
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21 piface "google.golang.org/protobuf/runtime/protoiface" |
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22 ) |
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23 |
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24 // legacyWrapMessage wraps v as a protoreflect.Message, |
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25 // where v must be a *struct kind and not implement the v2 API already. |
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26 func legacyWrapMessage(v reflect.Value) pref.Message { |
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27 t := v.Type() |
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28 if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct { |
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29 return aberrantMessage{v: v} |
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30 } |
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31 mt := legacyLoadMessageInfo(t, "") |
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32 return mt.MessageOf(v.Interface()) |
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33 } |
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34 |
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35 // legacyLoadMessageType dynamically loads a protoreflect.Type for t, |
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36 // where t must be not implement the v2 API already. |
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37 // The provided name is used if it cannot be determined from the message. |
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38 func legacyLoadMessageType(t reflect.Type, name pref.FullName) protoreflect.MessageType { |
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39 if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct { |
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40 return aberrantMessageType{t} |
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41 } |
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42 return legacyLoadMessageInfo(t, name) |
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43 } |
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44 |
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45 var legacyMessageTypeCache sync.Map // map[reflect.Type]*MessageInfo |
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46 |
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47 // legacyLoadMessageInfo dynamically loads a *MessageInfo for t, |
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48 // where t must be a *struct kind and not implement the v2 API already. |
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49 // The provided name is used if it cannot be determined from the message. |
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50 func legacyLoadMessageInfo(t reflect.Type, name pref.FullName) *MessageInfo { |
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51 // Fast-path: check if a MessageInfo is cached for this concrete type. |
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52 if mt, ok := legacyMessageTypeCache.Load(t); ok { |
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53 return mt.(*MessageInfo) |
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54 } |
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55 |
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56 // Slow-path: derive message descriptor and initialize MessageInfo. |
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57 mi := &MessageInfo{ |
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58 Desc: legacyLoadMessageDesc(t, name), |
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59 GoReflectType: t, |
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60 } |
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61 |
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62 var hasMarshal, hasUnmarshal bool |
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63 v := reflect.Zero(t).Interface() |
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64 if _, hasMarshal = v.(legacyMarshaler); hasMarshal { |
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65 mi.methods.Marshal = legacyMarshal |
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66 |
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67 // We have no way to tell whether the type's Marshal method |
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68 // supports deterministic serialization or not, but this |
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69 // preserves the v1 implementation's behavior of always |
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70 // calling Marshal methods when present. |
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71 mi.methods.Flags |= piface.SupportMarshalDeterministic |
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72 } |
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73 if _, hasUnmarshal = v.(legacyUnmarshaler); hasUnmarshal { |
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74 mi.methods.Unmarshal = legacyUnmarshal |
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75 } |
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76 if _, hasMerge := v.(legacyMerger); hasMerge || (hasMarshal && hasUnmarshal) { |
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77 mi.methods.Merge = legacyMerge |
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78 } |
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79 |
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80 if mi, ok := legacyMessageTypeCache.LoadOrStore(t, mi); ok { |
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81 return mi.(*MessageInfo) |
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82 } |
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83 return mi |
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84 } |
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85 |
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86 var legacyMessageDescCache sync.Map // map[reflect.Type]protoreflect.MessageDescriptor |
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87 |
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88 // LegacyLoadMessageDesc returns an MessageDescriptor derived from the Go type, |
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89 // which should be a *struct kind and must not implement the v2 API already. |
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90 // |
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91 // This is exported for testing purposes. |
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92 func LegacyLoadMessageDesc(t reflect.Type) pref.MessageDescriptor { |
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93 return legacyLoadMessageDesc(t, "") |
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94 } |
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95 func legacyLoadMessageDesc(t reflect.Type, name pref.FullName) pref.MessageDescriptor { |
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96 // Fast-path: check if a MessageDescriptor is cached for this concrete type. |
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97 if mi, ok := legacyMessageDescCache.Load(t); ok { |
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98 return mi.(pref.MessageDescriptor) |
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99 } |
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100 |
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101 // Slow-path: initialize MessageDescriptor from the raw descriptor. |
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102 mv := reflect.Zero(t).Interface() |
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103 if _, ok := mv.(pref.ProtoMessage); ok { |
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104 panic(fmt.Sprintf("%v already implements proto.Message", t)) |
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105 } |
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106 mdV1, ok := mv.(messageV1) |
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107 if !ok { |
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108 return aberrantLoadMessageDesc(t, name) |
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109 } |
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110 |
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111 // If this is a dynamic message type where there isn't a 1-1 mapping between |
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112 // Go and protobuf types, calling the Descriptor method on the zero value of |
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113 // the message type isn't likely to work. If it panics, swallow the panic and |
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114 // continue as if the Descriptor method wasn't present. |
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115 b, idxs := func() ([]byte, []int) { |
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116 defer func() { |
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117 recover() |
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118 }() |
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119 return mdV1.Descriptor() |
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120 }() |
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121 if b == nil { |
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122 return aberrantLoadMessageDesc(t, name) |
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123 } |
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124 |
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125 // If the Go type has no fields, then this might be a proto3 empty message |
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126 // from before the size cache was added. If there are any fields, check to |
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127 // see that at least one of them looks like something we generated. |
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128 if t.Elem().Kind() == reflect.Struct { |
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129 if nfield := t.Elem().NumField(); nfield > 0 { |
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130 hasProtoField := false |
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131 for i := 0; i < nfield; i++ { |
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132 f := t.Elem().Field(i) |
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133 if f.Tag.Get("protobuf") != "" || f.Tag.Get("protobuf_oneof") != "" || strings.HasPrefix(f.Name, "XXX_") { |
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134 hasProtoField = true |
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135 break |
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136 } |
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137 } |
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138 if !hasProtoField { |
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139 return aberrantLoadMessageDesc(t, name) |
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140 } |
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141 } |
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142 } |
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143 |
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144 md := legacyLoadFileDesc(b).Messages().Get(idxs[0]) |
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145 for _, i := range idxs[1:] { |
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146 md = md.Messages().Get(i) |
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147 } |
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148 if name != "" && md.FullName() != name { |
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149 panic(fmt.Sprintf("mismatching message name: got %v, want %v", md.FullName(), name)) |
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150 } |
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151 if md, ok := legacyMessageDescCache.LoadOrStore(t, md); ok { |
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152 return md.(protoreflect.MessageDescriptor) |
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153 } |
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154 return md |
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155 } |
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156 |
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157 var ( |
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158 aberrantMessageDescLock sync.Mutex |
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159 aberrantMessageDescCache map[reflect.Type]protoreflect.MessageDescriptor |
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160 ) |
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161 |
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162 // aberrantLoadMessageDesc returns an MessageDescriptor derived from the Go type, |
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163 // which must not implement protoreflect.ProtoMessage or messageV1. |
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164 // |
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165 // This is a best-effort derivation of the message descriptor using the protobuf |
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166 // tags on the struct fields. |
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167 func aberrantLoadMessageDesc(t reflect.Type, name pref.FullName) pref.MessageDescriptor { |
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168 aberrantMessageDescLock.Lock() |
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169 defer aberrantMessageDescLock.Unlock() |
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170 if aberrantMessageDescCache == nil { |
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171 aberrantMessageDescCache = make(map[reflect.Type]protoreflect.MessageDescriptor) |
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172 } |
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173 return aberrantLoadMessageDescReentrant(t, name) |
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174 } |
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175 func aberrantLoadMessageDescReentrant(t reflect.Type, name pref.FullName) pref.MessageDescriptor { |
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176 // Fast-path: check if an MessageDescriptor is cached for this concrete type. |
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177 if md, ok := aberrantMessageDescCache[t]; ok { |
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178 return md |
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179 } |
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180 |
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181 // Slow-path: construct a descriptor from the Go struct type (best-effort). |
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182 // Cache the MessageDescriptor early on so that we can resolve internal |
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183 // cyclic references. |
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184 md := &filedesc.Message{L2: new(filedesc.MessageL2)} |
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185 md.L0.FullName = aberrantDeriveMessageName(t, name) |
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186 md.L0.ParentFile = filedesc.SurrogateProto2 |
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187 aberrantMessageDescCache[t] = md |
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188 |
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189 if t.Kind() != reflect.Ptr || t.Elem().Kind() != reflect.Struct { |
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190 return md |
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191 } |
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192 |
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193 // Try to determine if the message is using proto3 by checking scalars. |
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194 for i := 0; i < t.Elem().NumField(); i++ { |
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195 f := t.Elem().Field(i) |
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196 if tag := f.Tag.Get("protobuf"); tag != "" { |
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197 switch f.Type.Kind() { |
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198 case reflect.Bool, reflect.Int32, reflect.Int64, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64, reflect.String: |
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199 md.L0.ParentFile = filedesc.SurrogateProto3 |
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200 } |
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201 for _, s := range strings.Split(tag, ",") { |
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202 if s == "proto3" { |
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203 md.L0.ParentFile = filedesc.SurrogateProto3 |
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204 } |
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205 } |
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206 } |
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207 } |
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208 |
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209 // Obtain a list of oneof wrapper types. |
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210 var oneofWrappers []reflect.Type |
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211 for _, method := range []string{"XXX_OneofFuncs", "XXX_OneofWrappers"} { |
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212 if fn, ok := t.MethodByName(method); ok { |
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213 for _, v := range fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))}) { |
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214 if vs, ok := v.Interface().([]interface{}); ok { |
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215 for _, v := range vs { |
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216 oneofWrappers = append(oneofWrappers, reflect.TypeOf(v)) |
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217 } |
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218 } |
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219 } |
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220 } |
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221 } |
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222 |
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223 // Obtain a list of the extension ranges. |
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224 if fn, ok := t.MethodByName("ExtensionRangeArray"); ok { |
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225 vs := fn.Func.Call([]reflect.Value{reflect.Zero(fn.Type.In(0))})[0] |
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226 for i := 0; i < vs.Len(); i++ { |
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227 v := vs.Index(i) |
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228 md.L2.ExtensionRanges.List = append(md.L2.ExtensionRanges.List, [2]pref.FieldNumber{ |
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229 pref.FieldNumber(v.FieldByName("Start").Int()), |
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230 pref.FieldNumber(v.FieldByName("End").Int() + 1), |
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231 }) |
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232 md.L2.ExtensionRangeOptions = append(md.L2.ExtensionRangeOptions, nil) |
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233 } |
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234 } |
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235 |
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236 // Derive the message fields by inspecting the struct fields. |
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237 for i := 0; i < t.Elem().NumField(); i++ { |
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238 f := t.Elem().Field(i) |
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239 if tag := f.Tag.Get("protobuf"); tag != "" { |
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240 tagKey := f.Tag.Get("protobuf_key") |
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241 tagVal := f.Tag.Get("protobuf_val") |
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242 aberrantAppendField(md, f.Type, tag, tagKey, tagVal) |
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243 } |
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244 if tag := f.Tag.Get("protobuf_oneof"); tag != "" { |
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245 n := len(md.L2.Oneofs.List) |
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246 md.L2.Oneofs.List = append(md.L2.Oneofs.List, filedesc.Oneof{}) |
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247 od := &md.L2.Oneofs.List[n] |
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248 od.L0.FullName = md.FullName().Append(pref.Name(tag)) |
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249 od.L0.ParentFile = md.L0.ParentFile |
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250 od.L0.Parent = md |
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251 od.L0.Index = n |
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252 |
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253 for _, t := range oneofWrappers { |
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254 if t.Implements(f.Type) { |
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255 f := t.Elem().Field(0) |
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256 if tag := f.Tag.Get("protobuf"); tag != "" { |
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257 aberrantAppendField(md, f.Type, tag, "", "") |
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258 fd := &md.L2.Fields.List[len(md.L2.Fields.List)-1] |
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259 fd.L1.ContainingOneof = od |
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260 od.L1.Fields.List = append(od.L1.Fields.List, fd) |
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261 } |
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262 } |
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263 } |
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264 } |
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265 } |
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266 |
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267 return md |
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268 } |
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269 |
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270 func aberrantDeriveMessageName(t reflect.Type, name pref.FullName) pref.FullName { |
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271 if name.IsValid() { |
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272 return name |
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273 } |
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274 func() { |
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275 defer func() { recover() }() // swallow possible nil panics |
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276 if m, ok := reflect.Zero(t).Interface().(interface{ XXX_MessageName() string }); ok { |
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277 name = pref.FullName(m.XXX_MessageName()) |
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278 } |
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279 }() |
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280 if name.IsValid() { |
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281 return name |
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282 } |
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283 if t.Kind() == reflect.Ptr { |
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284 t = t.Elem() |
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285 } |
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286 return AberrantDeriveFullName(t) |
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287 } |
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288 |
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289 func aberrantAppendField(md *filedesc.Message, goType reflect.Type, tag, tagKey, tagVal string) { |
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290 t := goType |
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291 isOptional := t.Kind() == reflect.Ptr && t.Elem().Kind() != reflect.Struct |
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292 isRepeated := t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 |
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293 if isOptional || isRepeated { |
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294 t = t.Elem() |
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295 } |
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296 fd := ptag.Unmarshal(tag, t, placeholderEnumValues{}).(*filedesc.Field) |
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297 |
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298 // Append field descriptor to the message. |
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299 n := len(md.L2.Fields.List) |
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300 md.L2.Fields.List = append(md.L2.Fields.List, *fd) |
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301 fd = &md.L2.Fields.List[n] |
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302 fd.L0.FullName = md.FullName().Append(fd.Name()) |
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303 fd.L0.ParentFile = md.L0.ParentFile |
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304 fd.L0.Parent = md |
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305 fd.L0.Index = n |
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306 |
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307 if fd.L1.IsWeak || fd.L1.HasPacked { |
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308 fd.L1.Options = func() pref.ProtoMessage { |
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309 opts := descopts.Field.ProtoReflect().New() |
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310 if fd.L1.IsWeak { |
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311 opts.Set(opts.Descriptor().Fields().ByName("weak"), protoreflect.ValueOfBool(true)) |
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312 } |
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313 if fd.L1.HasPacked { |
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314 opts.Set(opts.Descriptor().Fields().ByName("packed"), protoreflect.ValueOfBool(fd.L1.IsPacked)) |
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315 } |
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316 return opts.Interface() |
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317 } |
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318 } |
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319 |
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320 // Populate Enum and Message. |
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321 if fd.Enum() == nil && fd.Kind() == pref.EnumKind { |
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322 switch v := reflect.Zero(t).Interface().(type) { |
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323 case pref.Enum: |
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324 fd.L1.Enum = v.Descriptor() |
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325 default: |
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326 fd.L1.Enum = LegacyLoadEnumDesc(t) |
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327 } |
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328 } |
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329 if fd.Message() == nil && (fd.Kind() == pref.MessageKind || fd.Kind() == pref.GroupKind) { |
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330 switch v := reflect.Zero(t).Interface().(type) { |
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331 case pref.ProtoMessage: |
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332 fd.L1.Message = v.ProtoReflect().Descriptor() |
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333 case messageV1: |
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334 fd.L1.Message = LegacyLoadMessageDesc(t) |
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335 default: |
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336 if t.Kind() == reflect.Map { |
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337 n := len(md.L1.Messages.List) |
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338 md.L1.Messages.List = append(md.L1.Messages.List, filedesc.Message{L2: new(filedesc.MessageL2)}) |
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339 md2 := &md.L1.Messages.List[n] |
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340 md2.L0.FullName = md.FullName().Append(pref.Name(strs.MapEntryName(string(fd.Name())))) |
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341 md2.L0.ParentFile = md.L0.ParentFile |
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342 md2.L0.Parent = md |
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343 md2.L0.Index = n |
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344 |
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345 md2.L1.IsMapEntry = true |
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346 md2.L2.Options = func() pref.ProtoMessage { |
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347 opts := descopts.Message.ProtoReflect().New() |
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348 opts.Set(opts.Descriptor().Fields().ByName("map_entry"), protoreflect.ValueOfBool(true)) |
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349 return opts.Interface() |
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350 } |
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351 |
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352 aberrantAppendField(md2, t.Key(), tagKey, "", "") |
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353 aberrantAppendField(md2, t.Elem(), tagVal, "", "") |
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354 |
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355 fd.L1.Message = md2 |
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356 break |
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357 } |
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358 fd.L1.Message = aberrantLoadMessageDescReentrant(t, "") |
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359 } |
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360 } |
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361 } |
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362 |
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363 type placeholderEnumValues struct { |
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364 protoreflect.EnumValueDescriptors |
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365 } |
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366 |
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367 func (placeholderEnumValues) ByNumber(n pref.EnumNumber) pref.EnumValueDescriptor { |
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368 return filedesc.PlaceholderEnumValue(pref.FullName(fmt.Sprintf("UNKNOWN_%d", n))) |
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369 } |
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370 |
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371 // legacyMarshaler is the proto.Marshaler interface superseded by protoiface.Methoder. |
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372 type legacyMarshaler interface { |
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373 Marshal() ([]byte, error) |
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374 } |
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375 |
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376 // legacyUnmarshaler is the proto.Unmarshaler interface superseded by protoiface.Methoder. |
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377 type legacyUnmarshaler interface { |
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378 Unmarshal([]byte) error |
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379 } |
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380 |
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381 // legacyMerger is the proto.Merger interface superseded by protoiface.Methoder. |
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382 type legacyMerger interface { |
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383 Merge(protoiface.MessageV1) |
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384 } |
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385 |
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386 var aberrantProtoMethods = &piface.Methods{ |
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387 Marshal: legacyMarshal, |
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388 Unmarshal: legacyUnmarshal, |
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389 Merge: legacyMerge, |
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390 |
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391 // We have no way to tell whether the type's Marshal method |
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392 // supports deterministic serialization or not, but this |
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393 // preserves the v1 implementation's behavior of always |
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394 // calling Marshal methods when present. |
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395 Flags: piface.SupportMarshalDeterministic, |
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396 } |
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397 |
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398 func legacyMarshal(in piface.MarshalInput) (piface.MarshalOutput, error) { |
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399 v := in.Message.(unwrapper).protoUnwrap() |
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400 marshaler, ok := v.(legacyMarshaler) |
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401 if !ok { |
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402 return piface.MarshalOutput{}, errors.New("%T does not implement Marshal", v) |
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403 } |
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404 out, err := marshaler.Marshal() |
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405 if in.Buf != nil { |
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406 out = append(in.Buf, out...) |
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407 } |
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408 return piface.MarshalOutput{ |
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409 Buf: out, |
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410 }, err |
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411 } |
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412 |
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413 func legacyUnmarshal(in piface.UnmarshalInput) (piface.UnmarshalOutput, error) { |
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414 v := in.Message.(unwrapper).protoUnwrap() |
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415 unmarshaler, ok := v.(legacyUnmarshaler) |
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416 if !ok { |
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417 return piface.UnmarshalOutput{}, errors.New("%T does not implement Unmarshal", v) |
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418 } |
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419 return piface.UnmarshalOutput{}, unmarshaler.Unmarshal(in.Buf) |
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420 } |
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421 |
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422 func legacyMerge(in piface.MergeInput) piface.MergeOutput { |
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423 // Check whether this supports the legacy merger. |
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424 dstv := in.Destination.(unwrapper).protoUnwrap() |
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425 merger, ok := dstv.(legacyMerger) |
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426 if ok { |
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427 merger.Merge(Export{}.ProtoMessageV1Of(in.Source)) |
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428 return piface.MergeOutput{Flags: piface.MergeComplete} |
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429 } |
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430 |
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431 // If legacy merger is unavailable, implement merge in terms of |
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432 // a marshal and unmarshal operation. |
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433 srcv := in.Source.(unwrapper).protoUnwrap() |
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434 marshaler, ok := srcv.(legacyMarshaler) |
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435 if !ok { |
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436 return piface.MergeOutput{} |
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437 } |
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438 dstv = in.Destination.(unwrapper).protoUnwrap() |
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439 unmarshaler, ok := dstv.(legacyUnmarshaler) |
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440 if !ok { |
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441 return piface.MergeOutput{} |
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442 } |
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443 if !in.Source.IsValid() { |
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444 // Legacy Marshal methods may not function on nil messages. |
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445 // Check for a typed nil source only after we confirm that |
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446 // legacy Marshal/Unmarshal methods are present, for |
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447 // consistency. |
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448 return piface.MergeOutput{Flags: piface.MergeComplete} |
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449 } |
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450 b, err := marshaler.Marshal() |
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451 if err != nil { |
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452 return piface.MergeOutput{} |
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453 } |
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454 err = unmarshaler.Unmarshal(b) |
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455 if err != nil { |
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456 return piface.MergeOutput{} |
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457 } |
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458 return piface.MergeOutput{Flags: piface.MergeComplete} |
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459 } |
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460 |
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461 // aberrantMessageType implements MessageType for all types other than pointer-to-struct. |
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462 type aberrantMessageType struct { |
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463 t reflect.Type |
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464 } |
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465 |
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466 func (mt aberrantMessageType) New() pref.Message { |
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467 if mt.t.Kind() == reflect.Ptr { |
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468 return aberrantMessage{reflect.New(mt.t.Elem())} |
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469 } |
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470 return aberrantMessage{reflect.Zero(mt.t)} |
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471 } |
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472 func (mt aberrantMessageType) Zero() pref.Message { |
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473 return aberrantMessage{reflect.Zero(mt.t)} |
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474 } |
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475 func (mt aberrantMessageType) GoType() reflect.Type { |
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476 return mt.t |
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477 } |
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478 func (mt aberrantMessageType) Descriptor() pref.MessageDescriptor { |
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479 return LegacyLoadMessageDesc(mt.t) |
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480 } |
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481 |
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482 // aberrantMessage implements Message for all types other than pointer-to-struct. |
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483 // |
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484 // When the underlying type implements legacyMarshaler or legacyUnmarshaler, |
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485 // the aberrant Message can be marshaled or unmarshaled. Otherwise, there is |
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486 // not much that can be done with values of this type. |
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487 type aberrantMessage struct { |
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488 v reflect.Value |
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489 } |
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490 |
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491 // Reset implements the v1 proto.Message.Reset method. |
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492 func (m aberrantMessage) Reset() { |
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493 if mr, ok := m.v.Interface().(interface{ Reset() }); ok { |
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494 mr.Reset() |
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495 return |
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496 } |
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497 if m.v.Kind() == reflect.Ptr && !m.v.IsNil() { |
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498 m.v.Elem().Set(reflect.Zero(m.v.Type().Elem())) |
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499 } |
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500 } |
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501 |
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502 func (m aberrantMessage) ProtoReflect() pref.Message { |
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503 return m |
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504 } |
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505 |
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506 func (m aberrantMessage) Descriptor() pref.MessageDescriptor { |
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507 return LegacyLoadMessageDesc(m.v.Type()) |
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508 } |
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509 func (m aberrantMessage) Type() pref.MessageType { |
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510 return aberrantMessageType{m.v.Type()} |
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511 } |
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512 func (m aberrantMessage) New() pref.Message { |
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513 if m.v.Type().Kind() == reflect.Ptr { |
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514 return aberrantMessage{reflect.New(m.v.Type().Elem())} |
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515 } |
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516 return aberrantMessage{reflect.Zero(m.v.Type())} |
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517 } |
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518 func (m aberrantMessage) Interface() pref.ProtoMessage { |
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519 return m |
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520 } |
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521 func (m aberrantMessage) Range(f func(pref.FieldDescriptor, pref.Value) bool) { |
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522 return |
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523 } |
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524 func (m aberrantMessage) Has(pref.FieldDescriptor) bool { |
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525 return false |
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526 } |
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527 func (m aberrantMessage) Clear(pref.FieldDescriptor) { |
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528 panic("invalid Message.Clear on " + string(m.Descriptor().FullName())) |
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529 } |
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530 func (m aberrantMessage) Get(fd pref.FieldDescriptor) pref.Value { |
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531 if fd.Default().IsValid() { |
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532 return fd.Default() |
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533 } |
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534 panic("invalid Message.Get on " + string(m.Descriptor().FullName())) |
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535 } |
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536 func (m aberrantMessage) Set(pref.FieldDescriptor, pref.Value) { |
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537 panic("invalid Message.Set on " + string(m.Descriptor().FullName())) |
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538 } |
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539 func (m aberrantMessage) Mutable(pref.FieldDescriptor) pref.Value { |
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540 panic("invalid Message.Mutable on " + string(m.Descriptor().FullName())) |
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541 } |
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542 func (m aberrantMessage) NewField(pref.FieldDescriptor) pref.Value { |
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543 panic("invalid Message.NewField on " + string(m.Descriptor().FullName())) |
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544 } |
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545 func (m aberrantMessage) WhichOneof(pref.OneofDescriptor) pref.FieldDescriptor { |
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546 panic("invalid Message.WhichOneof descriptor on " + string(m.Descriptor().FullName())) |
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547 } |
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548 func (m aberrantMessage) GetUnknown() pref.RawFields { |
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549 return nil |
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550 } |
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551 func (m aberrantMessage) SetUnknown(pref.RawFields) { |
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552 // SetUnknown discards its input on messages which don't support unknown field storage. |
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553 } |
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554 func (m aberrantMessage) IsValid() bool { |
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555 if m.v.Kind() == reflect.Ptr { |
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556 return !m.v.IsNil() |
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557 } |
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558 return false |
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559 } |
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560 func (m aberrantMessage) ProtoMethods() *piface.Methods { |
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561 return aberrantProtoMethods |
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562 } |
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563 func (m aberrantMessage) protoUnwrap() interface{} { |
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564 return m.v.Interface() |
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565 } |