Started to Implement the Parser

MathPad/MPParsedElement.h

@@ -0,0 +1,39 @@
+//
+//  MPParsedElement.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 05.09.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+// DEBUG STUFF
+// Simple Operator:  +/-/*
+// Simple Factor:    * 5.4 * / * 5,4 / 5,4 * / 5,4
+// Independant Math: -1+2-3
+
+@interface MPParsedElement : NSObject <NSCopying>
+
+@property (nonatomic) BOOL isFactor;
+@property (nonatomic) double factor;
+
+@property (nonatomic, strong) NSMutableArray *summands;
+
+@property (nonatomic) double prefixMultiplicator;
+@property (nonatomic) BOOL hasPrefixMultiplicator;
+@property (nonatomic, getter = isPrefixOperatorExplicit) BOOL prefixOperatorExplicit;
+@property (nonatomic) double suffixMultiplicator;
+@property (nonatomic) BOOL hasSuffixMultiplicator;
+
+// No error checking done. The string parsed may for example end with an operator
+- (double)valueAtBeginning;
+- (double)valueAtEnd;
+- (double)standaloneValue;
+
+// For error checking
+- (BOOL)isValidElementAtBeginning;
+- (BOOL)isValidElementInBetween;
+- (BOOL)isValidElementAtEnd;
+
+@end