blob: 4e62d9e67895f390350e5161ed97091801d66933 [file] [log] [blame]
// 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"
"strings"
"cuelang.org/go/cue/ast"
"cuelang.org/go/cue/literal"
"cuelang.org/go/cue/token"
"cuelang.org/go/internal/core/adt"
)
func (e *exporter) stringLabel(f adt.Feature) ast.Label {
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:
s := f.IdentString(e.ctx)
return ast.NewIdent(s)
case adt.StringLabel:
s := e.ctx.IndexToString(int64(x))
if f == 0 || !ast.IsValidIdent(s) ||
strings.HasPrefix(s, "#") || strings.HasPrefix(s, "_") {
return ast.NewLit(token.STRING, literal.Label.Quote(s))
}
fallthrough
default:
return ast.NewIdent(e.ctx.IndexToString(int64(x)))
}
}