fj.P4 Maven / Gradle / Ivy
package fj;
import static fj.P.weakMemo;
/**
* A product-4.
*
* @version %build.number%
*/
public abstract class P4 {
/**
* Access the first element of the product.
*
* @return The first element of the product.
*/
public abstract A _1();
/**
* Access the second element of the product.
*
* @return The second element of the product.
*/
public abstract B _2();
/**
* Access the third element of the product.
*
* @return The third element of the product.
*/
public abstract C _3();
/**
* Access the fourth element of the product.
*
* @return The fourth element of the product.
*/
public abstract D _4();
/**
* Map the first element of the product.
*
* @param f The function to map with.
* @return A product with the given function applied.
*/
public final P4 map1(final F f) {
return new P4() {
public X _1() {
return f.f(P4.this._1());
}
public B _2() {
return P4.this._2();
}
public C _3() {
return P4.this._3();
}
public D _4() {
return P4.this._4();
}
};
}
/**
* Map the second element of the product.
*
* @param f The function to map with.
* @return A product with the given function applied.
*/
public final P4 map2(final F f) {
return new P4() {
public A _1() {
return P4.this._1();
}
public X _2() {
return f.f(P4.this._2());
}
public C _3() {
return P4.this._3();
}
public D _4() {
return P4.this._4();
}
};
}
/**
* Map the third element of the product.
*
* @param f The function to map with.
* @return A product with the given function applied.
*/
public final P4 map3(final F f) {
return new P4() {
public A _1() {
return P4.this._1();
}
public B _2() {
return P4.this._2();
}
public X _3() {
return f.f(P4.this._3());
}
public D _4() {
return P4.this._4();
}
};
}
/**
* Map the fourth element of the product.
*
* @param f The function to map with.
* @return A product with the given function applied.
*/
public final P4 map4(final F f) {
return new P4() {
public A _1() {
return P4.this._1();
}
public B _2() {
return P4.this._2();
}
public C _3() {
return P4.this._3();
}
public X _4() {
return f.f(P4.this._4());
}
};
}
/**
* Returns the 1-product projection over the first element.
*
* @return the 1-product projection over the first element.
*/
public final P1 _1_() {
return F1Functions.lazy(P4.__1()).f(this);
}
/**
* Returns the 1-product projection over the second element.
*
* @return the 1-product projection over the second element.
*/
public final P1 _2_() {
return F1Functions.lazy(P4.__2()).f(this);
}
/**
* Returns the 1-product projection over the third element.
*
* @return the 1-product projection over the third element.
*/
public final P1 _3_() {
return F1Functions.lazy(P4.__3()).f(this);
}
/**
* Returns the 1-product projection over the fourth element.
*
* @return the 1-product projection over the fourth element.
*/
public final P1 _4_() {
return F1Functions.lazy(P4.__4()).f(this);
}
/**
* Creates a {@link P5} by adding the given element to the current {@link P4}
*
* @param el the element to append
* @return A {@link P5} containing the original {@link P4} with the extra element added at the end
*/
public final P5 append(E el) {
return P.p(_1(), _2(), _3(), _4(), el);
}
/**
* Creates a {@link P6} by adding the given element to the current {@link P4}
*
* @param el the element to append
* @return A {@link P6} containing the original {@link P4} with the extra element added at the end
*/
public final P6 append(P2 el) {
return P.p(_1(), _2(), _3(), _4(), el._1(), el._2());
}
/**
* Creates a {@link P7} by adding the given element to the current {@link P4}
*
* @param el the element to append
* @return A {@link P7} containing the original {@link P4} with the extra element added at the end
*/
public final P7 append(P3 el) {
return P.p(_1(), _2(), _3(), _4(), el._1(), el._2(), el._3());
}
/**
* Creates a {@link P8} by adding the given element to the current {@link P4}
*
* @param el the element to append
* @return A {@link P8} containing the original {@link P4} with the extra element added at the end
*/
public final P8 append(P4 el) {
return P.p(_1(), _2(), _3(), _4(), el._1(), el._2(), el._3(), el._4());
}
/**
* Provides a memoising P4 that remembers its values.
*
* @return A P4 that calls this P4 once for any given element and remembers the value for subsequent calls.
*/
public final P4 memo() {
P4 self = this;
return new P4() {
private final P1 a = weakMemo(self::_1);
private final P1 b = weakMemo(self::_2);
private final P1 c = weakMemo(self::_3);
private final P1 d = weakMemo(self::_4);
public A _1() {
return a._1();
}
public B _2() {
return b._1();
}
public C _3() {
return c._1();
}
public D _4() {
return d._1();
}
};
}
/**
* Returns a function that returns the first element of a product.
*
* @return A function that returns the first element of a product.
*/
public static F, A> __1() {
return P4::_1;
}
/**
* Returns a function that returns the second element of a product.
*
* @return A function that returns the second element of a product.
*/
public static F, B> __2() {
return P4::_2;
}
/**
* Returns a function that returns the third element of a product.
*
* @return A function that returns the third element of a product.
*/
public static F, C> __3() {
return P4::_3;
}
/**
* Returns a function that returns the fourth element of a product.
*
* @return A function that returns the fourth element of a product.
*/
public static F, D> __4() {
return P4::_4;
}
@Override
public final String toString() {
return Show.p4Show(Show.anyShow(), Show.anyShow(), Show.anyShow(), Show.anyShow()).showS(this);
}
@Override
public final boolean equals(Object other) {
return Equal.equals0(P4.class, this, other,
() -> Equal.p4Equal(Equal.anyEqual(), Equal.anyEqual(), Equal.anyEqual(), Equal.anyEqual()));
}
@Override
public final int hashCode() {
return Hash.p4Hash(Hash.anyHash(), Hash.anyHash(), Hash.anyHash(), Hash.anyHash()).hash(this);
}
}
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