[Cocci] Replacing a struct member with a function call

[Thomas Adam]

Hello all,

I'm wanting to replace a struct member with a function call across the
code base I'm working on.

For example, I currently have the following struct definition (simplified):

struct monitor {
    struct {
        int width;
        int height
    } virtual;
};

Across my code base, I typically have the following:

struct monitor *m;
int f = m->virtual.width;

I have a need to remove `m->virtual.width` with a function call, hence
the example above after the modified code would look something like:

struct monitor *m;
int f = get_monitor_width();

I've tried the following smPL code without any success.  Could someone
point me in the right direction?  TIA!

@@
type M;
@@
- m->virtual.width;
+ get_monitor_width();

-- Thomas
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