TASK
Extend the compiler to provide full support for the
constructs listed below. Full support means: parsing, AST, pretty
printing, well-formedness checking, type-checking, AST
transformations (and code generation).
* do-while loops
* for loops
* switch statements (C-style, with fall-through, default)
(You may reject multiple defaults and identical cases in the same
compound statement -- even if they are in different switches.)
* continue (works with do, for and while)
* break (works with do, for, switch and while)
* pre-increment: ++e (e must be int lval, ++e is not an lval)
* post-increment: e++ (e must be int lval, e++ is not an lval)
* conditional expressions: e1?e2:e3 (e1 must be int, e1?e2:e3 is not an lval)
The semantics should be consistent with C, except as noted above for
switch. You may want to look at a C reference to ensure that you
understand the semantics. For example:
http://msdn2.microsoft.com/en-us/library/015az3wz%28VS.80%29.aspx
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SUBMISSION
The same criteria for grading and submission instructions apply as
before. Copy grader.txt into examples/clogs/grader.txt and run "ant
submit" in examples/clogs.
