extern int x1f4_line_expression (void *x1f4_expression, void *context);
x1f4_line_expression function performs various expression
See Optimizing Expressions.
0 for success, non zero otherwise.
context evaluation context is passed as the first argument to
executed function and operator logic evaluation routines. It is otherwise not
If the function fails for whatever reason the expression parsed representation
is still valid, hence ignoring the result is safe. Nonetheless, the expression
parsed representation may be changed by the
execution, even when function fails to complete successfully.
The expresion evaluation stack memory requirements may be changed as a result of expression optimizations, though the new requirements should always be smaller than the former ones.
See Managing Stacks.