68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
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/*
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* Copyright 2022 CloudWeGo Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package golang
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// Enum .
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var enum = `
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{{define "Enum"}}
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{{- $EnumType := (Identify .Name)}}
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type {{$EnumType}} {{.GoType}}
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const (
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{{- range $i, $e := .Values}}
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{{$EnumType}}_{{$e.Name}} {{$EnumType}} = {{$e.Value.Expression}}
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{{- end}}
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)
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func (p {{$EnumType}}) String() string {
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switch p {
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{{- range $i, $e := .Values}}
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case {{$EnumType}}_{{$e.Name}}:
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return "{{printf "%s%s" $EnumType $e.Name | SnakeCase}}"
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{{- end}}
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}
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return "<UNSET>"
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}
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func {{$EnumType}}FromString(s string) ({{$EnumType}}, error) {
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switch s {
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{{- range $i, $e := .Values}}
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case "{{printf "%s%s" $EnumType $e.Name | SnakeCase}}":
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return {{$EnumType}}_{{$e.Name}}, nil
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{{- end}}
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}
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return {{$EnumType}}(0), fmt.Errorf("not a valid {{$EnumType}} string")
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}
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{{- if Features.MarshalEnumToText}}
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func (p {{$EnumType}}) MarshalText() ([]byte, error) {
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return []byte(p.String()), nil
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}
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func (p *{{$EnumType}}) UnmarshalText(text []byte) error {
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q, err := {{$EnumType}}FromString(string(text))
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if err != nil {
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return err
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}
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*p = q
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return nil
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}
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{{- end}}
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{{end}}
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`
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