Add Root Function and Product Function

MathKit/MPProductFunction.m

@@ -0,0 +1,46 @@
+//
+//  MPProductFunction.m
+//  MathPad
+//
+//  Created by Kim Wittenburg on 10.01.15.
+//  Copyright (c) 2015 Kim Wittenburg. All rights reserved.
+//
+
+#import "MPProductFunction.h"
+
+#import "MPProductFunctionTerm.h"
+#import "MPExpression.h"
+
+
+
+@implementation MPProductFunction
+
+MPFunctionAccessorImplementation(StartExpression, _startExpression)
+MPFunctionAccessorImplementation(TargetExpression, _targetExpression)
+MPFunctionAccessorImplementation(ProductExpression, _productExpression)
+
+
+- (NSArray *)childrenAccessors
+{
+    return @[@"startExpression", @"targetExpression", @"productExpression"];
+}
+
+
+- (BOOL)expectsVariableDefinitionInChildAtIndex:(NSUInteger)index
+{
+    return index == 0;
+}
+
+
+- (Class)functionTermClass
+{
+    return [MPProductFunctionTerm class];
+}
+
+
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"Product(From: %@; To: %@; Using: %@)", self.startExpression, self.targetExpression, self.productExpression];
+}
+
+@end