Improved Evaluation

MathPad/MPFunction.m

@@ -14,6 +14,11 @@
 
 @implementation MPFunction
 
++ (NSString *)localizedFunctionName
+{
+    return NSLocalizedString(@"Function", @"Name of Generic Function.");
+}
+
 #pragma mark Creation Methods
 - (instancetype)init
 {
@@ -82,9 +87,9 @@
 }
 
 #pragma mark Evaluating Functions
-- (NSDecimalNumber *)evaluateWithError:(MPParseError *__autoreleasing *)error
+- (MPTerm *)parseWithError:(MPParseError *__autoreleasing *)error
 {
-    return [NSDecimalNumber zero];
+    return nil;
 }
 
 #pragma mark Notifications