Assignment/Project
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| 10/6/00
Friday |
Exercises
3.3b, 3.6abcd ("describe" means a high-level English
description, not a direct translation of the symbols into English), 3.7af,
3.14 (for each of the special symbols *, ?
and [...] in Unix filename expressions,
show the equivalent regular expressions) |
| 10/10/00
Tuesday (due by 5PM!) |
Exercises
3.16abc, 3.17abc |
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Extend
the description of the PL/0 lexical structure to include the new language
features.
The changes to the lexical structure are:
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add
comments (from # to the end of the
line) as whitespace |
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allow
underscores in identifiers |
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support
the new reserved words: else,
for, to,
break, return,
array, of, bool,
true, false,
and, or |
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support
new punctuation tokens: [, ] |
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Extend
the PL/0 scanner to scan the extended language. Use the -T
option to stop compiling after scanning. |
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For this
and all future projects (until told otherwise), turn in "enscript
-2r"ed (or equivalent) laser-printer listings of the modified
files of your C++ implementation, with your changes highlighted, along
with sample input programs in the extended language and outputs logs that
demonstrate that the modified parts of your compiler correctly implement
the extended language. (Make sure your names and student numbers are
marked clearly.)
For all implementation projects, you will be graded on correctness of
your implementation, on clarity and good design of your implementation,
and on sufficiency of your test cases.
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