Macro for iterating over a GList

Question

I am using GLib's doubly linked list structure, GList. I would like to know if there is any standard macro for iterating over a GList. I couldn't find any such thing in the GLib documentation. As a result I have made my own macro, but I'd rather use something standard if it exists. To Illustrate the the issue: Usually I write a lot of code which looks like this: ``` GList *list, *elem; MyType *item; for(elem = list; elem; elem = elem->next) { item = elem->data; /* do something with item */ } ``` With a macro it can be reduced to ``` GList *list; MyType *item; GFOREACH(item, list) { /* do something with item */ } ``` Which is much less noisy. Note: I realised that GLib supplies a foreach function for iterating over a list and calling a callback for each element, but often the indirection of a callback makes the code harder to read, especially if the callback is only used once. Update: seeing as there is no standard macro, I'm putting the macro I am using here in case it is of any use t…

Accepted Answer

There is no such macro.

I usually use a `for` loop like in your example unless the operation spans more than, say, fifteen lines, in which case I usually find that an extra foreach function with a descriptive name is more readable than the alternative.

What you may not realize is that you don't necessarily have to write your own foreach function:

```
g_list_foreach(list, (GFunc)g_free, NULL);
```

frees each item in the list, an operation that I often use.

Macro for iterating over a GList

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