It depends. When the program is running and e.g. stopped by the debugger, you can use the TAB-autocompletion. But during editing, the field names of a struct (not "structural", which is something else) are not necessarily known, such that an auto-completion cannot be successful. A static code analysis might be misleading also, because fields can be created dynamically also. Example:
S.Field1 = 1;
if rand > 0.5
S.Field2 = 2;
else
S.Field3 = 3;
end
S.[Auto-completion cannot work here!]
