119 lines
3.1 KiB
Objective-C
119 lines
3.1 KiB
Objective-C
//
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// MPExpression.h
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// MathPad
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//
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// Created by Kim Wittenburg on 17.04.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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@class MPExpression, MPFunction;
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extern NSString *MPAdditionOperator;
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extern NSString *MPSubtractionOperator;
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extern NSString *MPMultiplicationOperator;
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extern NSString *MPDivisionOperator;
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@interface MPExpression : NSObject <NSCopying, NSMutableCopying, NSCoding>
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#pragma mark Creation Methods
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- (instancetype)initWithSymbols:(NSArray *)symbols;
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#pragma mark Working With the Expression Tree
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@property (nonatomic, weak) MPFunction *parent; // Documentation: Do not set, may be nil
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- (void)fixSymbols;
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#pragma mark Primitive Methods
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- (NSUInteger)numberOfSymbols;
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- (id)symbolAtIndex:(NSUInteger)index; // Either an NSString or a MPFunction (which can be mutated)
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- (double)doubleValue; // Evaluates Expression
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@end
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@interface MPExpression (MPExpressionExtensionMethods)
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+ (NSArray *)operators;
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#pragma mark Creation Methods
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- (id)init;
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- (instancetype)initWithString:(NSString *)aString;
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- (instancetype)initWithFunction:(MPFunction *)aFunction;
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+ (instancetype)expression;
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+ (instancetype)expressionWithString:(NSString *)aString;
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+ (instancetype)expressionWithFunction:(MPFunction *)aFunction;
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+ (instancetype)expressionWithSymbols:(NSArray *)symbols;
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#pragma mark Working with Expressions
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- (NSUInteger)length;
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- (MPExpression *)subexpressionFromIndex:(NSUInteger)from;
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- (MPExpression *)subexpressionToIndex:(NSUInteger)to;
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- (MPExpression *)subexpressionWithRange:(NSRange)range;
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- (BOOL)isEqualToExpression:(MPExpression *)anExpression;
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- (MPExpression *)expressionByAppendingString:(NSString *)aString;
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- (MPExpression *)expressionByAppendingFunction:(MPFunction *)aFunction;
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- (MPExpression *)expressionByAppendingExpression:(MPExpression *)anExpression;
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- (MPExpression *)expressionByAppendingSymbols:(NSArray *)symbols;
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#pragma mark Evaluating Expressions
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- (float)floatValue;
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- (int)intValue;
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- (NSInteger)integerValue;
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- (long long)longLongValue;
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#pragma mark Querying an Expression's Contents
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- (NSArray *)symbols;
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- (NSString *)description;
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- (NSUInteger)hash;
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@end
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@interface MPMutableExpression : MPExpression
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- (void)replaceSymbolsInRange:(NSRange)range
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withSymbols:(NSArray *)symbols;
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- (void)beginEditing;
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- (void)endEditing;
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@end
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@interface MPMutableExpression (MPMutableExpressionExtensionMethods)
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- (void)insertString:(NSString *)aString
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atIndex:(NSUInteger)loc;
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- (void)insertFunction:(MPFunction *)aFunction
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atIndex:(NSUInteger)loc;
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- (void)insertExpression:(MPExpression *)anExpression
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atIndex:(NSUInteger)loc;
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- (void)insertSymbols:(NSArray *)symbols
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atIndex:(NSUInteger)loc;
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- (void)deleteSymbolsInRange:(NSRange)range;
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- (void)appendString:(NSString *)aString;
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- (void)appendFunction:(MPFunction *)aFunction;
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- (void)appendExpression:(MPExpression *)anExpression;
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- (void)appendSymbols:(NSArray *)symbols;
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- (void)setString:(NSString *)aString;
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- (void)setFunction:(MPFunction *)aFunction;
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- (void)setExpression:(MPExpression *)anExpression;
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- (void)setSymbols:(NSArray *)symbols;
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@end
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