58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
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/*
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Copyright 2015 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 types
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// FlattenMembers recursively takes any embedded members and puts them in the
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// top level, correctly hiding them if the top level hides them. There must not
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// be a cycle-- that implies infinite members.
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//
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// This is useful for e.g. computing all the valid keys in a json struct,
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// properly considering any configuration of embedded structs.
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func FlattenMembers(m []Member) []Member {
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embedded := []Member{}
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normal := []Member{}
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type nameInfo struct {
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top bool
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i int
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}
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names := map[string]nameInfo{}
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for i := range m {
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if m[i].Embedded && m[i].Type.Kind == Struct {
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embedded = append(embedded, m[i])
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} else {
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normal = append(normal, m[i])
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names[m[i].Name] = nameInfo{true, len(normal) - 1}
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}
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}
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for i := range embedded {
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for _, e := range FlattenMembers(embedded[i].Type.Members) {
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if info, found := names[e.Name]; found {
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if info.top {
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continue
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}
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if n := normal[info.i]; n.Name == e.Name && n.Type == e.Type {
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continue
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}
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panic("conflicting members")
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}
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normal = append(normal, e)
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names[e.Name] = nameInfo{false, len(normal) - 1}
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}
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}
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return normal
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}
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