Cleaned Code by Removing Location Tracking for Errors

MathPad/MPUnexpectedSymbolValue.m

@@ -8,9 +8,7 @@
 
 #import "MPUnexpectedSymbolValue.h"
 
-@implementation MPUnexpectedSymbolValue {
-    NSRange _range;
-}
+@implementation MPUnexpectedSymbolValue
 
 - (instancetype)init
 {
@@ -25,7 +23,6 @@
     self = [self init];
     if (self) {
         [tokenStream beginIgnoringWhitespaceTokens];
-        _range = tokenStream.currentToken.range;
         _symbol = tokenStream.currentToken.stringValue;
         [tokenStream currentTokenConsumed];
         [tokenStream endIgnoringOrAcceptingWhitespaceTokens];
@@ -33,15 +30,12 @@
     return self;
 }
 
-- (NSRange)range
-{
-    return _range;
-}
-
-- (BOOL)validate:(MPParseError *__autoreleasing *)error
+- (BOOL)validate:(NSError *__autoreleasing *)error
 {
     if (error) {
-        *error = MPParseError(self.range, @"Unknown Symbol.");
+        *error = MPParseError(10,
+                              NSLocalizedString(@"Unknown Symbol.", @"Error message. Displayed when an unknown symbol was encountered during parsing."),
+                              nil);
     }
     return NO;
 }