Thread: Map member of class produces error - why?

Originally Posted by Programmer_P

And yet it would not let me use the insert() function to insert things into the map, when it was just an instance and not a typedef. It was only when I changed it to use the '[]' and '=' operators, like in your example, that it compiled. Why is that?

Show the code in which you tried to "use the insert() function to insert things into the map, when it was just an instance and not a typedef".

Originally Posted by Elysia

The constructor of the map is invoked before the constructor body of your class.
The map is ready to use since it's an object inside your class (not a pointer nor a reference).

Ok, then I have no idea why I'm now getting another error with a different member map, one that is a copy of the original map and is assigned with the '=' operator of the map class inside a member function.

Show your code, please.

Originally Posted by laserlight

Show the code in which you tried to "use the inshttp://cboard.cprogramming.com/newreply.php?do=newreply&p=954825ert() function to insert things into the map, when it was just an instance and not a typedef".

EDIT: Delete reply...

My code has compiled.

Originally Posted by Elysia

Show your code, please.

No need. It was a noobie mistake. I accidentally forgot to prefix the member function definition that assigns one map to another map to make a copy of the map, then returns the copy, with the class name followed by the "::" operator, which is why it was saying the map copy name didn't exist in the scope.

All good now.

Depends on what you need. If you are just going to insert without regard as to whether it's there or not, then the index operator might do the job.
Any other reason it shouldn't be preferred?