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/*
* Copyright 2016 Miroslav Janíček
*
* 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 net.sandius.rembulan.parser.analysis;
import net.sandius.rembulan.parser.ast.Name;
import net.sandius.rembulan.util.Check;
public class Variable {
public static final Name ENV_NAME = Name.fromString("_ENV");
public static final Variable ENV = new Variable(ENV_NAME);
private final Name name;
private final Ref ref;
public Variable(Name name) {
this.name = Check.notNull(name);
this.ref = new Ref(this);
}
public Name name() {
return name;
}
public Ref ref() {
return ref;
}
public static class Ref {
private final Variable var;
public Ref(Variable var) {
this.var = Check.notNull(var);
}
public Variable var() {
return var;
}
}
}