Package org.eolang

Class ExprReduce<T>

java.lang.Object

org.eolang.ExprReduce<T>

Type Parameters:

T - Type of arguments that are going to be reduced

All Implemented Interfaces:

Expr

public final class ExprReduce<T>
extends Object
implements Expr

Builds a phi performing reduction operation on varargs parameter.

Definition example:

     final VarargExpr<Long> expr = new VarargExpr<>(
         "x",
         new ExrpReduce.Args(
             "plus",
             Long.class,
             Long::sum,
             x -> ""
         )
     );
 

Since:

1.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ExprReduce.Args<T>	Extracts and validates args.

Constructor Summary

Constructors

Constructor	Description
ExprReduce(String param, BinaryOperator<T> reduction, ExprReduce.Args<T> arguments)	Ctor.

Method Summary

Modifier and Type	Method	Description
Phi	get(Phi rho)	Get the object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExprReduce

public ExprReduce(String param,
                  BinaryOperator<T> reduction,
                  ExprReduce.Args<T> arguments)

Ctor.

Parameters:

param - Name of parameter with varargs

reduction - Reduction operation on consecutive varags

arguments - Arguments storing and parsing object

Since:

1.0

Method Detail

get

public Phi get(Phi rho)

Description copied from interface: Expr

Get the object.

Specified by:

get in interface Expr

Parameters:

rho - The \rho of this expression (the parent of it)

Returns:

The Phi calculated