extern int x1f4_line_expression (void *expression);
x1f4_line_expression function performs various expression
expression. It leaves out some available
optimizations, including the ones significantly increasing code size.
See Optimizing Expressions.
0 for success, non zero otherwise.
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.