| // Copyright 2020 CUE Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package export |
| |
| import ( |
| "strconv" |
| |
| "cuelang.org/go/cue/ast" |
| "cuelang.org/go/cue/token" |
| "cuelang.org/go/internal/core/adt" |
| ) |
| |
| func (e *exporter) stringLabel(f adt.Feature) ast.Label { |
| if f == 0 { |
| return ast.NewIdent("_") |
| } |
| x := f.Index() |
| switch f.Typ() { |
| case adt.IntLabel: |
| return ast.NewLit(token.INT, strconv.Itoa(int(x))) |
| |
| case adt.DefinitionLabel, adt.HiddenLabel, adt.HiddenDefinitionLabel: |
| return ast.NewIdent(e.ctx.IndexToString(int64(x))) |
| |
| case adt.StringLabel: |
| s := e.ctx.IndexToString(int64(x)) |
| if !ast.IsValidIdent(s) { |
| return ast.NewLit(token.STRING, strconv.Quote(s)) |
| } |
| fallthrough |
| |
| default: |
| return ast.NewIdent(e.ctx.IndexToString(int64(x))) |
| } |
| } |