A function which decides whether the row indicated by iter matches a given key, and should be displayed as a
possible completion for key.
There is no replacement
Note that key is normalized and case-folded (see normalize
and casefold). If this is not appropriate, match functions have access to
the unmodified key via `gtk_editable_get_text (GTK_EDITABLE (gtk_entry_completion_get_entry ()))`.
| completion |
the `GtkEntryCompletion` |
| key |
the string to match, normalized and case-folded |
| iter |
a `GtkTreeIter` indicating the row to match |
| user_data |
user data given to set_match_func |
|
true if |