//
//  MPSummand.h
//  MathPad
//
//  Created by Kim Wittenburg on 09.10.14.
//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
//

#import "MPExpressionTreeElement.h"



@class MPSummand, MPOperatorChain, MPProduct;


/*!
    @class      MPSummand
    @brief      A summand is a part of an expression that consists of a list of
                addition and subtraction operators and a product.
 */
@interface MPSummand : NSObject <MPExpressionTreeElement>


/*!
    @property   operatorChain
    @brief      The summand's preceeding operators.
 
    @discussion The operator chain is interpreted as a factor for the @c product
                property of the summand during evaluation.
 */
@property (readonly, nonatomic, strong) MPOperatorChain *operatorChain;


/*!
    @property   product
    @brief      The summand's product.
 
    @discussion The product is the @em value of a summand.
 */
@property (readonly, nonatomic, strong) MPProduct *product;

@end