fj.data.$ Maven / Gradle / Ivy

Go to download
package fj.data;

import fj.P1;

/**
 * The constant arrow, for attaching a new name to an existing type. For every pair of types A and B, this type
 * is the identity morphism from B to B.
 */
@SuppressWarnings({"UnusedDeclaration"})
public final class $ extends P1 {

  private final B b;

  private $(final B b) {
    this.b = b;
  }

  /**
   * Returns a function that given an argument, returns a function that ignores its argument.
   * @deprecated  JDK 8 warns '_' may not be supported after SE 8.  As of release 4.4, use {@link #constant} (note the synonym {@link #__}).
   * @return A function that given an argument, returns a function that ignores its argument.
   */
  @Deprecated
  public static  $ _(final B b) {
    return constant(b);
  }

	public static  $ __(final B b) {
		return constant(b);
	}

	public static  $ constant(final B b) {
		return new $(b);
	}


	public B _1() {
    return b;
  }
}