internal/core/export/label.go

// 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/token"
	"cuelang.org/go/internal/core/adt"
)

func (e *exporter) stringLabel(f adt.Feature) ast.Label {
	str := f.SelectorString(e.index)
	if strings.HasPrefix(str, "#") && !f.IsDef() ||
		strings.HasPrefix(str, "_") && !f.IsHidden() ||
		!ast.IsValidIdent(str) {
		return ast.NewLit(token.STRING, strconv.Quote(str))
	}
	return &ast.Ident{Name: str}
}