/* In: Input_line_pointer points to 1st char of operand, which may
be a space.
- Out: A expressionS.
+ Out: An expressionS.
The operand may have been empty: in this case X_op == O_absent.
Input_line_pointer->(next non-blank) char after operand. */
\f
/* Internal. Simplify a struct expression for use by expr (). */
-/* In: address of a expressionS.
+/* In: address of an expressionS.
The X_op field of the expressionS may only take certain values.
Elsewise we waste time special-case testing. Sigh. Ditto SEG_ABSENT.
Unary operators and parenthetical expressions are treated as operands.
As usual, Q==quantity==operand, O==operator, X==expression mnemonics.
- We used to do a aho/ullman shift-reduce parser, but the logic got so
+ We used to do an aho/ullman shift-reduce parser, but the logic got so
warped that I flushed it and wrote a recursive-descent parser instead.
Now things are stable, would anybody like to write a fast parser?
Most expressions are either register (which does not even reach here)