package edu.harvard.seas.pl.formulog.parsing;

/*-
 * #%L
 * Formulog
 * %%
 * Copyright (C) 2018 - 2020 President and Fellows of Harvard College
 * %%
 * 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.
 * #L%
 */

import edu.harvard.seas.pl.formulog.ast.Var;
import edu.harvard.seas.pl.formulog.symbols.FunctionSymbol;

public class Identifier {

	private final Object val;

	private Identifier(Object val) {
		this.val = val;
	}

	public static Identifier make(Var var) {
		return new Identifier(var);
	}

	public static Identifier make(FunctionSymbol sym) {
		return new Identifier(sym);
	}

	public boolean isFunctionSymbol() {
		return val instanceof FunctionSymbol;
	}

	public boolean isVar() {
		return val instanceof Var;
	}

	public FunctionSymbol asFunctionSymbol() {
		return (FunctionSymbol) val;
	}

	public Var asVar() {
		return (Var) val;
	}

}
