Cleaned Code by Removing Location Tracking for Errors

MathPad/MPRootFunction.m

@@ -0,0 +1,43 @@
+//
+//  MPRootFunction.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 22.10.14.
+//  Copyright (c) 2014 Kim Wittenburg. All rights reserved.
+//
+
+#import "MPRootFunction.h"
+
+#import "MPExpressionTree.h"
+
+@implementation MPRootFunction
+
+MPFunctionAccessorImplementation(ExponentExpression, _exponentExpression)
+MPFunctionAccessorImplementation(RadicantExpression, _radicantExpression)
+
+- (NSArray *)childrenAccessors
+{
+    return @[@"exponentExpression", @"radicantExpression"];
+}
+
+- (BOOL)validate:(NSError *__autoreleasing *)error
+{
+    return [[self.exponentExpression parse] validate:error] && [[self.radicantExpression parse] validate:error];
+}
+
+- (NSDecimalNumber *)evaluate
+{
+    NSDecimalNumber *exponent = [[self.exponentExpression parse] evaluate];
+    NSDecimalNumber *radicant = [[self.radicantExpression parse] evaluate];
+    return [[NSDecimalNumber alloc] initWithDouble:pow(radicant.doubleValue, exponent.doubleValue)];
+}
+
+- (NSString *)description
+{
+    if (self.exponentExpression == nil) {
+        return [NSString stringWithFormat:@"√%@", self.radicantExpression.description];
+    }
+    return [NSString stringWithFormat:@"pow(%@; %@)", self.radicantExpression.description, self.exponentExpression];
+}
+
+@end