Write L-attributed SDD's analogous to that of Example $5.19$ for the following productions, each of which represents a familiar flow-of-control construct, as in the programming language C. You may need to generate a three address statement to jump to a particular label $L$, in which case you should generate goto $L$.
- $S\rightarrow f (C) S_{1}\:else\:S_{2}$
- $S\rightarrow do\:S_{1}\: while\:(C)$
- $S\rightarrow '\{'L'\}';\:L\rightarrow LS\mid \epsilon$
Note that any statement in the list can have a jump from its middle to the next statement, so it is not sufficient simply to generate code for each statement in order.
