Added Documentation

MathPad/MPSumFunction.m

@@ -12,19 +12,25 @@
 #import "MPExpressionTree.h"
 #import "MPEvaluationContext.h"
 
+
+
 @implementation MPSumFunction
 
+
 MPFunctionAccessorImplementation(StartExpression, _startExpression)
 MPFunctionAccessorImplementation(TargetExpression, _targetExpression)
 MPFunctionAccessorImplementation(SumExpression, _sumExpression)
 
+
 - (NSArray *)childrenAccessors
 {
     return @[@"startExpression", @"targetExpression", @"sumExpression"];
 }
 
+
 #pragma mark Evaluating Functions
 
+
 - (BOOL)validate:(NSError *__autoreleasing *)error
 {
     MPExpressionTree *startTree = [self.startExpression parse];
@@ -47,6 +53,7 @@ MPFunctionAccessorImplementation(SumExpression, _sumExpression)
     return YES;
 }
 
+
 - (NSDecimalNumber *)evaluate
 {
     MPExpressionTree *startTree = [self.startExpression parse];
@@ -67,8 +74,10 @@ MPFunctionAccessorImplementation(SumExpression, _sumExpression)
     return value;
 }
 
+
 #pragma mark Working With Functions
 
+
 - (NSString *)description
 {
     return [NSString stringWithFormat:@"Sum(From: %@; To: %@; Using: %@)", self.startExpression, self.targetExpression, self.sumExpression];