// Path: src/main/java/com/shapesecurity/functional/Unit.java
// public final class Unit {
//     public final static Unit unit = new Unit();
// 
//     private Unit() {
//     }
// }


import com.shapesecurity.functional.Unit;
import javax.annotation.CheckReturnValue;
import javax.annotation.Nonnull;
/*
 * Copyright 2014 Shape Security, Inc.
 *
 * 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.shapesecurity.functional.data;



@CheckReturnValue
public interface Semigroup<T> {
    UnitIdentity UNIT_IDENTITY = new UnitIdentity();
    IntegerAdditive INTEGER_ADDITIVE = new IntegerAdditive();
    IntegerMultiplicative INTEGER_MULTIPLICATIVE = new IntegerMultiplicative();
    StringConcat STRING_CONCAT = new StringConcat();
    BooleanOr BOOLEAN_OR = new BooleanOr();
    BooleanAnd BOOLEAN_AND = new BooleanAnd();

    @Nonnull
    T append(T a, T b);

// Path: src/main/java/com/shapesecurity/functional/Unit.java
// public final class Unit {
//     public final static Unit unit = new Unit();
// 
//     private Unit() {
//     }
// }


// Path: src/main/java/com/shapesecurity/functional/data/Semigroup.java
import com.shapesecurity.functional.Unit;
import javax.annotation.CheckReturnValue;
import javax.annotation.Nonnull;

/*
 * Copyright 2014 Shape Security, Inc.
 *
 * 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.shapesecurity.functional.data;



@CheckReturnValue
public interface Semigroup<T> {
    UnitIdentity UNIT_IDENTITY = new UnitIdentity();
    IntegerAdditive INTEGER_ADDITIVE = new IntegerAdditive();
    IntegerMultiplicative INTEGER_MULTIPLICATIVE = new IntegerMultiplicative();
    StringConcat STRING_CONCAT = new StringConcat();
    BooleanOr BOOLEAN_OR = new BooleanOr();
    BooleanAnd BOOLEAN_AND = new BooleanAnd();

    @Nonnull
    T append(T a, T b);

    class UnitIdentity implements Semigroup<Unit> {