Added Some Helpers

MathPad/MPRangePath.m

@@ -116,6 +116,20 @@
     return [self.location isEqual:aRangePath.location] && self.length == aRangePath.length;
 }
 
+- (NSString *)description
+{
+    NSMutableString *description = [[NSMutableString alloc] initWithString:@"MPRangePath<location="];
+    if (self.location.length > 0) {
+        [description appendFormat:@"%ld", [self.location indexAtPosition:0]];
+    }
+    for (NSUInteger position = 1; position < self.location.length; position ++) {
+        [description appendFormat:@",%ld", [self.location indexAtPosition:position]];
+    }
+    [description appendFormat:@" length=%ld", self.length];
+    [description appendString:@">"];
+    return description.copy;
+}
+
 #pragma mark - NSCopying
 
 - (id)copyWithZone:(NSZone *)zone