69 lines
2.0 KiB
Objective-C
69 lines
2.0 KiB
Objective-C
//
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// MPFunction.h
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// MathPad
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//
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// Created by Kim Wittenburg on 18.04.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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@import Foundation;
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#import "MPExpressionElement.h"
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#import "MPParseError.h"
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#define MPFunctionAccessorImplementation(Accessor, variableName) \
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- (void)set##Accessor:(MPExpression *)value \
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{ \
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variableName.parent = nil; \
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variableName = value; \
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variableName.parent = self; \
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[self didChangeChildAtIndex:[self indexOfChild:variableName]]; \
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}
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@class MPFunction, MPExpression, MPRangePath;
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@interface MPFunction : NSObject <NSCoding, NSCopying, MPExpressionElement>
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#pragma mark Creation Methods
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- (instancetype)init;
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#pragma mark Properties
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// Subclasses should define accessor properties for all sub expressions, which, in the setter, should send didChangeElementAtRangePath:replacementLength: to self with a replacement length of 1.
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#pragma mark Working With the Expression Tree
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@property (nonatomic, weak) MPExpression *parent; // Documentation: Do not set
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- (MPExpression *)rootExpression;
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- (NSIndexPath *)indexPath;
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- (NSArray *)childrenAccessors; // Override
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- (NSUInteger)numberOfChildren;
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- (MPExpression *)childAtIndex:(NSUInteger)index;
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- (void)setChild:(MPExpression *)child
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atIndex:(NSUInteger)index;
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- (NSArray *)children; // Indexes must equal the ones from the other methods
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- (NSUInteger)indexOfChild:(MPExpression *)child;
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- (id)elementAtIndexPath:(NSIndexPath *)indexPath;
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#pragma mark Evaluating Functions
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- (BOOL)validate:(MPParseError *__autoreleasing *)error; // Override
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- (NSDecimalNumber *)evaluate; // Override
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#pragma mark Messages
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- (void)didChangeElementsInRangePath:(MPRangePath *)rangePath
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replacementLength:(NSUInteger)replacementLength;
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- (void)didChangeChildAtIndex:(NSUInteger)index;
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#pragma mark Working With Functions
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// - (BOOL)isEqualToFunction:(MPFunction *)aFunction; // Override
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- (NSString *)description; // Should be overridden
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- (NSUInteger)hash;
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- (id)copyWithZone:(NSZone *)zone;
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@end
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