Cleaned Code by Removing Location Tracking for Errors

MathPad/MPOperatorChain.m

@@ -8,9 +8,7 @@
 
 #import "MPOperatorChain.h"
 
-@implementation MPOperatorChain {
-    NSRange _range;
-}
+@implementation MPOperatorChain
 
 - (id)init
 {
@@ -26,11 +24,12 @@
     if (self) {
         [tokenStream beginIgnoringWhitespaceTokens];
         MPToken *currentToken = tokenStream.currentToken;
+        
         if (currentToken.tokenType != MPOperatorListToken) {
             @throw [NSException exceptionWithName:NSInternalInconsistencyException reason:@"Expected Operators" userInfo:nil];
         }
+        
         NSString *operatorString = currentToken.stringValue;
-        _range = currentToken.range;
         operatorString = [[operatorString componentsSeparatedByString:@" "] componentsJoinedByString:@""];
         _negating = NO;
         _numberOfOperators = operatorString.length;
@@ -39,18 +38,14 @@
                 _negating = !_negating;
             }
         }
+        
         [tokenStream currentTokenConsumed];
         [tokenStream endIgnoringOrAcceptingWhitespaceTokens];
     }
     return self;
 }
 
-- (NSRange)range
-{
-    return _range;
-}
-
-- (BOOL)validate:(MPParseError *__autoreleasing *)error
+- (BOOL)validate:(NSError *__autoreleasing *)error
 {
     return YES;
 }
@@ -60,16 +55,4 @@
     return self.negating ? [[NSDecimalNumber alloc] initWithInteger:-1] : [NSDecimalNumber one];
 }
 
-- (NSArray *)expressionElements
-{
-    NSMutableString *text = [[NSMutableString alloc] init];
-    for (NSUInteger index = 1; index < self.numberOfOperators; index++) {
-        [text appendString:@"+"];
-    }
-    if (self.negating) {
-        [text appendString:@"-"];
-    }
-    return @[text.copy];
-}
-
 @end