Fundamental Redesign of Evaluation

MathPad/MPTerm.h

@@ -0,0 +1,28 @@
+//
+//  MPTerm.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 11.11.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+
+@class MPTerm, MPTokenStream;
+@protocol MPToken;
+
+@interface MPTerm : NSObject
+
+- (NSDecimalNumber *)evaluate:(NSError *__autoreleasing *)error;
+- (NSDecimalNumber *)doEvaluation:(NSError *__autoreleasing *)error;
+
+- (BOOL)defineVariable:(NSString *)variableName
+                 value:(NSDecimalNumber *)value
+                 error:(NSError *__autoreleasing *)error;
+- (BOOL)redefineVariable:(NSString *)variableName
+                   value:(NSDecimalNumber *)value
+                   error:(NSError *__autoreleasing *)error;
+- (NSDecimalNumber *)valueForVariable:(NSString *)variableName
+                                error:(NSError *__autoreleasing *)error;
+- (void)undefineVariable:(NSString *)variableName; // Should rarely be needed, defined variables are automatically undefined at the end of evaluation.
+
+@end