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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.syntax;
import com.google.devtools.build.lib.events.Location;
/**
* Skylark values that support querying by other objects, i.e. `foo in object`.
* Semantics of the operation may differ, i.e. dicts check for keys and lists for values.
*/
public interface SkylarkQueryable {
/** Returns whether the key is in the object. */
boolean containsKey(Object key, Location loc) throws EvalException;
// Variant used when called directly from a Starlark thread.
// This is a temporary workaround to enable --incompatible_disallow_dict_lookup_unhashable_keys.
// TODO(adonovan): remove when that flag is removed.
default boolean containsKey(Object key, Location loc, StarlarkThread thread)
throws EvalException {
return this.containsKey(key, loc);
}
}