Fundamental Redesign of Evaluation

MathPad/MPParsedExpression.h

@@ -0,0 +1,34 @@
+//
+//  MPParsedExpression.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 14.11.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+@class MPParsedExpression, MPTokenStream, MPTerm;
+@protocol MPToken;
+
+/*!
+ @const      MPMathKitErrorDomain
+ @brief      Predefined error domain for errors from the MathKit framework.
+ 
+ @discussion Errors in MathKit can occur during parsing of expressions or
+ during evaluation of expressions. These two can be distinguished
+ by the error code. Parsing errors have lower error codes.
+ Evaluation errors (math errors) have error codes from @c 100 upwards.
+ */
+FOUNDATION_EXPORT NSString *const MPMathKitErrorDomain;
+
+FOUNDATION_EXPORT NSString *const MPPathToExpressionKey;
+FOUNDATION_EXPORT NSString *const MPErrorIndexKey;
+
+
+@interface MPParsedExpression : NSObject
+
+@property (nonatomic, strong) NSString *definedVariable;
+@property (nonatomic, strong) MPTerm *term;
+
+- (NSDecimalNumber *)evaluate:(NSError *__autoreleasing *)error;
+
+@end