extern int x1f4_copy_expression (void **expression, void *x1f4_expression);
x1f4_copy_expression function creates a copy of the
x1f4_expression expression parsed represention and stores its reference
at the address indicated by
The function returns
0 for success, non zero otherwise.
If the application stacks allocation was requested for the
x1f4_expression expression parsed representation the newly created
expression parsed representation will not have the expression evaluation
required stacks allocated and it will be marked as application stacks
See Managing Stacks.