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// Copyright 2022 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 path provides utilities for converting cue.Selectors and cue.Paths to
// internal equivalents.
package path
import (
"math/bits"
"cuelang.org/go/cue"
"cuelang.org/go/internal/core/adt"
"cuelang.org/go/internal/core/runtime"
)
// ToFeatureType converts a SelectorType constant to a FeatureType. It assumes a single label bit is set.
func ToFeatureType(t cue.SelectorType) adt.FeatureType {
t = t.LabelType()
return adt.FeatureType(bits.Len16(uint16(t)))
}
// MakeFeature converts a cue.Selector to an adt.Feature for a given runtime.
func MakeFeature(r *runtime.Runtime, s cue.Selector) adt.Feature {
constraintType := s.ConstraintType()
labelType := s.LabelType()
if constraintType == cue.PatternConstraint {
switch labelType {
case cue.StringLabel:
return adt.AnyString
case cue.IndexLabel:
return adt.AnyIndex
// These are not really a thing at the moment:
case cue.DefinitionLabel:
return adt.AnyDefinition
case cue.HiddenLabel:
return adt.AnyHidden // TODO: fix
case cue.HiddenDefinitionLabel:
return adt.AnyHidden // TODO: fix
default:
panic("unreachable")
}
}
switch labelType {
case cue.StringLabel:
return adt.MakeStringLabel(r, s.Unquoted())
case cue.IndexLabel:
return adt.MakeIntLabel(adt.IntLabel, int64(s.Index()))
case cue.DefinitionLabel:
return adt.MakeNamedLabel(r, adt.DefinitionLabel, s.String())
case cue.HiddenLabel:
str := adt.HiddenKey(s.String(), s.PkgPath())
return adt.MakeNamedLabel(r, adt.HiddenLabel, str)
case cue.HiddenDefinitionLabel:
str := adt.HiddenKey(s.String(), s.PkgPath())
return adt.MakeNamedLabel(r, adt.HiddenDefinitionLabel, str)
default:
return adt.InvalidLabel
}
}
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