set_context()
public method
These two functions are useful to detect if a variable
separated by dot (foo.bar) is an array or object. To avoid
overhead we decide it at compile time, rather than
ask over and over at rendering time.
foo.bar:
+ If foo exists at compile time,
and it is an array, it would be foo['bar']
otherwise it'd be foo->bar.
+ If foo don't exists at compile time,
it would be foo->bar if the compiler option
dot_as_object is TRUE (by default) otherwise
it'd be foo['bar']
