Apply.java

package calculator.interpreter.ast.lambda;

import java.util.ArrayList;
import java.util.LinkedList;
import calculator.interpreter.Environment;
import calculator.interpreter.Function;
import calculator.interpreter.ast.Expression;

/**
 * Apply operation
 */
public class Apply extends Expression {
  /** the function */
  public Expression function;
  /** the function arguments */
  public final LinkedList<Expression> arguments = new LinkedList<Expression>();

  @Override
  public Object eval(Environment env) {
    Object f = function.eval(env);
    ArrayList<Object> args = new ArrayList<Object>(arguments.size());
    for (Expression a : arguments) {
      args.add(a.eval(env));
    }
    return Function.apply(location, f, args);
  }
}