Cleaned Code by Removing Location Tracking for Errors

MathPad/MPExpression.m

@@ -16,6 +16,11 @@
 #import "MPExpressionTokenizer.h"
 #import "MPToken.h"
 
+#import "MPExpressionTree.h"
+
+
+NSString *const MPMathKitErrorDomain = @"MPMathKitErrorDomain";
+NSString *const MPExpressionPathErrorKey = @"MPExpressionPathErrorKey";
 
 
 @interface MPExpression () {
@@ -54,11 +59,6 @@
     return [self initWithElements:@[]];
 }
 
-- (instancetype)initWithExpressionTree:(MPExpressionTree *)expressionTree
-{
-    return [self initWithElements:expressionTree.expressionElements];
-}
-
 - (instancetype)initWithElement:(id<MPExpressionElement>)element
 {
     return [self initWithElements:@[element]];
@@ -521,7 +521,7 @@
 
 #pragma mark Evaluating Expressions
 
-- (NSDecimalNumber *)evaluateWithError:(MPParseError *__autoreleasing *)error
+- (NSDecimalNumber *)evaluateWithError:(NSError *__autoreleasing *)error
 {
     MPExpressionTree *tree = [self parse];
     return [tree validate:error] ? [tree evaluate] : nil;