mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-10 15:20:56 +00:00
632 lines
18 KiB
Go
632 lines
18 KiB
Go
// Protocol Buffers for Go with Gadgets
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//
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// Copyright (c) 2013, The GoGo Authors. All rights reserved.
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// http://github.com/gogo/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/*
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The equal plugin generates an Equal and a VerboseEqual method for each message.
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These equal methods are quite obvious.
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The only difference is that VerboseEqual returns a non nil error if it is not equal.
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This error contains more detail on exactly which part of the message was not equal to the other message.
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The idea is that this is useful for debugging.
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Equal is enabled using the following extensions:
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- equal
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- equal_all
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While VerboseEqual is enable dusing the following extensions:
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- verbose_equal
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- verbose_equal_all
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The equal plugin also generates a test given it is enabled using one of the following extensions:
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- testgen
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- testgen_all
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Let us look at:
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github.com/gogo/protobuf/test/example/example.proto
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Btw all the output can be seen at:
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github.com/gogo/protobuf/test/example/*
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The following message:
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option (gogoproto.equal_all) = true;
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option (gogoproto.verbose_equal_all) = true;
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message B {
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optional A A = 1 [(gogoproto.nullable) = false, (gogoproto.embed) = true];
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repeated bytes G = 2 [(gogoproto.customtype) = "github.com/gogo/protobuf/test/custom.Uint128", (gogoproto.nullable) = false];
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}
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given to the equal plugin, will generate the following code:
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func (this *B) VerboseEqual(that interface{}) error {
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if that == nil {
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if this == nil {
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return nil
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}
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return fmt2.Errorf("that == nil && this != nil")
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}
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that1, ok := that.(*B)
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if !ok {
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return fmt2.Errorf("that is not of type *B")
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}
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if that1 == nil {
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if this == nil {
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return nil
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}
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return fmt2.Errorf("that is type *B but is nil && this != nil")
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} else if this == nil {
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return fmt2.Errorf("that is type *B but is not nil && this == nil")
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}
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if !this.A.Equal(&that1.A) {
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return fmt2.Errorf("A this(%v) Not Equal that(%v)", this.A, that1.A)
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}
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if len(this.G) != len(that1.G) {
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return fmt2.Errorf("G this(%v) Not Equal that(%v)", len(this.G), len(that1.G))
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}
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for i := range this.G {
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if !this.G[i].Equal(that1.G[i]) {
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return fmt2.Errorf("G this[%v](%v) Not Equal that[%v](%v)", i, this.G[i], i, that1.G[i])
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}
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}
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if !bytes.Equal(this.XXX_unrecognized, that1.XXX_unrecognized) {
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return fmt2.Errorf("XXX_unrecognized this(%v) Not Equal that(%v)", this.XXX_unrecognized, that1.XXX_unrecognized)
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}
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return nil
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}
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func (this *B) Equal(that interface{}) bool {
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if that == nil {
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return this == nil
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}
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that1, ok := that.(*B)
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if !ok {
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return false
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}
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if that1 == nil {
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return this == nil
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} else if this == nil {
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return false
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}
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if !this.A.Equal(&that1.A) {
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return false
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}
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if len(this.G) != len(that1.G) {
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return false
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}
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for i := range this.G {
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if !this.G[i].Equal(that1.G[i]) {
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return false
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}
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}
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if !bytes.Equal(this.XXX_unrecognized, that1.XXX_unrecognized) {
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return false
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}
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return true
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}
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and the following test code:
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func TestBVerboseEqual(t *testing8.T) {
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popr := math_rand8.New(math_rand8.NewSource(time8.Now().UnixNano()))
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p := NewPopulatedB(popr, false)
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dAtA, err := github_com_gogo_protobuf_proto2.Marshal(p)
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if err != nil {
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panic(err)
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}
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msg := &B{}
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if err := github_com_gogo_protobuf_proto2.Unmarshal(dAtA, msg); err != nil {
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panic(err)
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}
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if err := p.VerboseEqual(msg); err != nil {
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t.Fatalf("%#v !VerboseEqual %#v, since %v", msg, p, err)
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}
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*/
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package equal
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import (
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"github.com/gogo/protobuf/gogoproto"
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"github.com/gogo/protobuf/proto"
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descriptor "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
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"github.com/gogo/protobuf/protoc-gen-gogo/generator"
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"github.com/gogo/protobuf/vanity"
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)
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type plugin struct {
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*generator.Generator
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generator.PluginImports
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fmtPkg generator.Single
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bytesPkg generator.Single
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protoPkg generator.Single
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}
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func NewPlugin() *plugin {
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return &plugin{}
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}
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func (p *plugin) Name() string {
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return "equal"
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}
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func (p *plugin) Init(g *generator.Generator) {
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p.Generator = g
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}
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func (p *plugin) Generate(file *generator.FileDescriptor) {
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p.PluginImports = generator.NewPluginImports(p.Generator)
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p.fmtPkg = p.NewImport("fmt")
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p.bytesPkg = p.NewImport("bytes")
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p.protoPkg = p.NewImport("github.com/gogo/protobuf/proto")
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for _, msg := range file.Messages() {
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if msg.DescriptorProto.GetOptions().GetMapEntry() {
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continue
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}
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if gogoproto.HasVerboseEqual(file.FileDescriptorProto, msg.DescriptorProto) {
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p.generateMessage(file, msg, true)
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}
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if gogoproto.HasEqual(file.FileDescriptorProto, msg.DescriptorProto) {
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p.generateMessage(file, msg, false)
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}
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}
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}
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func (p *plugin) generateNullableField(fieldname string, verbose bool) {
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p.P(`if this.`, fieldname, ` != nil && that1.`, fieldname, ` != nil {`)
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p.In()
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p.P(`if *this.`, fieldname, ` != *that1.`, fieldname, `{`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", *this.`, fieldname, `, *that1.`, fieldname, `)`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`} else if this.`, fieldname, ` != nil {`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("this.`, fieldname, ` == nil && that.`, fieldname, ` != nil")`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`} else if that1.`, fieldname, ` != nil {`)
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}
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func (p *plugin) generateMsgNullAndTypeCheck(ccTypeName string, verbose bool) {
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p.P(`if that == nil {`)
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p.In()
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if verbose {
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p.P(`if this == nil {`)
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p.In()
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p.P(`return nil`)
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p.Out()
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p.P(`}`)
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("that == nil && this != nil")`)
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} else {
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p.P(`return this == nil`)
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}
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p.Out()
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p.P(`}`)
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p.P(``)
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p.P(`that1, ok := that.(*`, ccTypeName, `)`)
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p.P(`if !ok {`)
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p.In()
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p.P(`that2, ok := that.(`, ccTypeName, `)`)
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p.P(`if ok {`)
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p.In()
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p.P(`that1 = &that2`)
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p.Out()
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p.P(`} else {`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("that is not of type *`, ccTypeName, `")`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`}`)
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p.P(`if that1 == nil {`)
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p.In()
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if verbose {
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p.P(`if this == nil {`)
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p.In()
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p.P(`return nil`)
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p.Out()
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p.P(`}`)
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("that is type *`, ccTypeName, ` but is nil && this != nil")`)
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} else {
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p.P(`return this == nil`)
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}
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p.Out()
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p.P(`} else if this == nil {`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("that is type *`, ccTypeName, ` but is not nil && this == nil")`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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}
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func (p *plugin) generateField(file *generator.FileDescriptor, message *generator.Descriptor, field *descriptor.FieldDescriptorProto, verbose bool) {
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proto3 := gogoproto.IsProto3(file.FileDescriptorProto)
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fieldname := p.GetOneOfFieldName(message, field)
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repeated := field.IsRepeated()
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ctype := gogoproto.IsCustomType(field)
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nullable := gogoproto.IsNullable(field)
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isDuration := gogoproto.IsStdDuration(field)
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isTimestamp := gogoproto.IsStdTime(field)
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// oneof := field.OneofIndex != nil
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if !repeated {
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if ctype || isTimestamp {
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if nullable {
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p.P(`if that1.`, fieldname, ` == nil {`)
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p.In()
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p.P(`if this.`, fieldname, ` != nil {`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("this.`, fieldname, ` != nil && that1.`, fieldname, ` == nil")`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`} else if !this.`, fieldname, `.Equal(*that1.`, fieldname, `) {`)
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} else {
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p.P(`if !this.`, fieldname, `.Equal(that1.`, fieldname, `) {`)
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}
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", this.`, fieldname, `, that1.`, fieldname, `)`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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} else if isDuration {
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if nullable {
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p.generateNullableField(fieldname, verbose)
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} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
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}
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", this.`, fieldname, `, that1.`, fieldname, `)`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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} else {
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if field.IsMessage() || p.IsGroup(field) {
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if nullable {
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p.P(`if !this.`, fieldname, `.Equal(that1.`, fieldname, `) {`)
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} else {
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p.P(`if !this.`, fieldname, `.Equal(&that1.`, fieldname, `) {`)
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}
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} else if field.IsBytes() {
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p.P(`if !`, p.bytesPkg.Use(), `.Equal(this.`, fieldname, `, that1.`, fieldname, `) {`)
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} else if field.IsString() {
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if nullable && !proto3 {
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p.generateNullableField(fieldname, verbose)
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} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
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}
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} else {
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if nullable && !proto3 {
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p.generateNullableField(fieldname, verbose)
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} else {
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p.P(`if this.`, fieldname, ` != that1.`, fieldname, `{`)
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}
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}
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", this.`, fieldname, `, that1.`, fieldname, `)`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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}
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} else {
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p.P(`if len(this.`, fieldname, `) != len(that1.`, fieldname, `) {`)
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", len(this.`, fieldname, `), len(that1.`, fieldname, `))`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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p.P(`for i := range this.`, fieldname, ` {`)
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p.In()
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if ctype && !p.IsMap(field) {
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p.P(`if !this.`, fieldname, `[i].Equal(that1.`, fieldname, `[i]) {`)
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} else if isTimestamp {
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if nullable {
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p.P(`if !this.`, fieldname, `[i].Equal(*that1.`, fieldname, `[i]) {`)
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} else {
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p.P(`if !this.`, fieldname, `[i].Equal(that1.`, fieldname, `[i]) {`)
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}
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} else if isDuration {
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if nullable {
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p.P(`if dthis, dthat := this.`, fieldname, `[i], that1.`, fieldname, `[i]; (dthis != nil && dthat != nil && *dthis != *dthat) || (dthis != nil && dthat == nil) || (dthis == nil && dthat != nil) {`)
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} else {
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p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
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}
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} else {
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if p.IsMap(field) {
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m := p.GoMapType(nil, field)
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valuegoTyp, _ := p.GoType(nil, m.ValueField)
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valuegoAliasTyp, _ := p.GoType(nil, m.ValueAliasField)
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nullable, valuegoTyp, valuegoAliasTyp = generator.GoMapValueTypes(field, m.ValueField, valuegoTyp, valuegoAliasTyp)
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mapValue := m.ValueAliasField
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if mapValue.IsMessage() || p.IsGroup(mapValue) {
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if nullable && valuegoTyp == valuegoAliasTyp {
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p.P(`if !this.`, fieldname, `[i].Equal(that1.`, fieldname, `[i]) {`)
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} else {
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// Equal() has a pointer receiver, but map value is a value type
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a := `this.` + fieldname + `[i]`
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b := `that1.` + fieldname + `[i]`
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if valuegoTyp != valuegoAliasTyp {
|
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// cast back to the type that has the generated methods on it
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a = `(` + valuegoTyp + `)(` + a + `)`
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b = `(` + valuegoTyp + `)(` + b + `)`
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}
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p.P(`a := `, a)
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p.P(`b := `, b)
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if nullable {
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p.P(`if !a.Equal(b) {`)
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} else {
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p.P(`if !(&a).Equal(&b) {`)
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}
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}
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} else if mapValue.IsBytes() {
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if ctype {
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if nullable {
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p.P(`if !this.`, fieldname, `[i].Equal(*that1.`, fieldname, `[i]) { //nullable`)
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} else {
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p.P(`if !this.`, fieldname, `[i].Equal(that1.`, fieldname, `[i]) { //not nullable`)
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}
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} else {
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p.P(`if !`, p.bytesPkg.Use(), `.Equal(this.`, fieldname, `[i], that1.`, fieldname, `[i]) {`)
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}
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} else if mapValue.IsString() {
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p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
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} else {
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p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
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}
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} else if field.IsMessage() || p.IsGroup(field) {
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if nullable {
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p.P(`if !this.`, fieldname, `[i].Equal(that1.`, fieldname, `[i]) {`)
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} else {
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p.P(`if !this.`, fieldname, `[i].Equal(&that1.`, fieldname, `[i]) {`)
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}
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} else if field.IsBytes() {
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p.P(`if !`, p.bytesPkg.Use(), `.Equal(this.`, fieldname, `[i], that1.`, fieldname, `[i]) {`)
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} else if field.IsString() {
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p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
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} else {
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p.P(`if this.`, fieldname, `[i] != that1.`, fieldname, `[i] {`)
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}
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}
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p.In()
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if verbose {
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p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this[%v](%v) Not Equal that[%v](%v)", i, this.`, fieldname, `[i], i, that1.`, fieldname, `[i])`)
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} else {
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p.P(`return false`)
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}
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p.Out()
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p.P(`}`)
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p.Out()
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p.P(`}`)
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}
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}
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func (p *plugin) generateMessage(file *generator.FileDescriptor, message *generator.Descriptor, verbose bool) {
|
|
ccTypeName := generator.CamelCaseSlice(message.TypeName())
|
|
if verbose {
|
|
p.P(`func (this *`, ccTypeName, `) VerboseEqual(that interface{}) error {`)
|
|
} else {
|
|
p.P(`func (this *`, ccTypeName, `) Equal(that interface{}) bool {`)
|
|
}
|
|
p.In()
|
|
p.generateMsgNullAndTypeCheck(ccTypeName, verbose)
|
|
oneofs := make(map[string]struct{})
|
|
|
|
for _, field := range message.Field {
|
|
oneof := field.OneofIndex != nil
|
|
if oneof {
|
|
fieldname := p.GetFieldName(message, field)
|
|
if _, ok := oneofs[fieldname]; ok {
|
|
continue
|
|
} else {
|
|
oneofs[fieldname] = struct{}{}
|
|
}
|
|
p.P(`if that1.`, fieldname, ` == nil {`)
|
|
p.In()
|
|
p.P(`if this.`, fieldname, ` != nil {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("this.`, fieldname, ` != nil && that1.`, fieldname, ` == nil")`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else if this.`, fieldname, ` == nil {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("this.`, fieldname, ` == nil && that1.`, fieldname, ` != nil")`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
if verbose {
|
|
p.P(`} else if err := this.`, fieldname, `.VerboseEqual(that1.`, fieldname, `); err != nil {`)
|
|
} else {
|
|
p.P(`} else if !this.`, fieldname, `.Equal(that1.`, fieldname, `) {`)
|
|
}
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return err`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
p.generateField(file, message, field, verbose)
|
|
}
|
|
}
|
|
if message.DescriptorProto.HasExtension() {
|
|
if gogoproto.HasExtensionsMap(file.FileDescriptorProto, message.DescriptorProto) {
|
|
fieldname := "XXX_InternalExtensions"
|
|
p.P(`thismap := `, p.protoPkg.Use(), `.GetUnsafeExtensionsMap(this)`)
|
|
p.P(`thatmap := `, p.protoPkg.Use(), `.GetUnsafeExtensionsMap(that1)`)
|
|
p.P(`for k, v := range thismap {`)
|
|
p.In()
|
|
p.P(`if v2, ok := thatmap[k]; ok {`)
|
|
p.In()
|
|
p.P(`if !v.Equal(&v2) {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this[%v](%v) Not Equal that[%v](%v)", k, thismap[k], k, thatmap[k])`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`} else {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, `[%v] Not In that", k)`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
|
|
p.P(`for k, _ := range thatmap {`)
|
|
p.In()
|
|
p.P(`if _, ok := thismap[k]; !ok {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, `[%v] Not In this", k)`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
p.Out()
|
|
p.P(`}`)
|
|
} else {
|
|
fieldname := "XXX_extensions"
|
|
p.P(`if !`, p.bytesPkg.Use(), `.Equal(this.`, fieldname, `, that1.`, fieldname, `) {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", this.`, fieldname, `, that1.`, fieldname, `)`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
if gogoproto.HasUnrecognized(file.FileDescriptorProto, message.DescriptorProto) {
|
|
fieldname := "XXX_unrecognized"
|
|
p.P(`if !`, p.bytesPkg.Use(), `.Equal(this.`, fieldname, `, that1.`, fieldname, `) {`)
|
|
p.In()
|
|
if verbose {
|
|
p.P(`return `, p.fmtPkg.Use(), `.Errorf("`, fieldname, ` this(%v) Not Equal that(%v)", this.`, fieldname, `, that1.`, fieldname, `)`)
|
|
} else {
|
|
p.P(`return false`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
if verbose {
|
|
p.P(`return nil`)
|
|
} else {
|
|
p.P(`return true`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
|
|
//Generate Equal methods for oneof fields
|
|
m := proto.Clone(message.DescriptorProto).(*descriptor.DescriptorProto)
|
|
for _, field := range m.Field {
|
|
oneof := field.OneofIndex != nil
|
|
if !oneof {
|
|
continue
|
|
}
|
|
ccTypeName := p.OneOfTypeName(message, field)
|
|
if verbose {
|
|
p.P(`func (this *`, ccTypeName, `) VerboseEqual(that interface{}) error {`)
|
|
} else {
|
|
p.P(`func (this *`, ccTypeName, `) Equal(that interface{}) bool {`)
|
|
}
|
|
p.In()
|
|
|
|
p.generateMsgNullAndTypeCheck(ccTypeName, verbose)
|
|
vanity.TurnOffNullableForNativeTypes(field)
|
|
p.generateField(file, message, field, verbose)
|
|
|
|
if verbose {
|
|
p.P(`return nil`)
|
|
} else {
|
|
p.P(`return true`)
|
|
}
|
|
p.Out()
|
|
p.P(`}`)
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
generator.RegisterPlugin(NewPlugin())
|
|
}
|