Fundamental Redesign of Evaluation

MathPad/MPFractionTerm.m

@@ -0,0 +1,27 @@
+//
+//  MPFractionTerm.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 15.11.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import "MPFractionTerm.h"
+
+@implementation MPFractionTerm
+
+- (NSDecimalNumber *)doEvaluation:(NSError *__autoreleasing *)error
+{
+    NSDecimalNumber *nominator = [[self expressionAtIndex:0] evaluate:error];
+    if (!nominator) {
+        return nil;
+    }
+    NSDecimalNumber *denominator = [[self expressionAtIndex:1] evaluate:error];
+    if (!denominator) {
+        return nil;
+    }
+#warning Division by zero ahead
+    return [nominator decimalNumberByDividingBy:denominator];
+}
+
+@end