Re: Compiler Books? Parsers?

napi@cs.indiana.edu (Mohd Hanafiah Abdullah)
1 Nov 2003 12:03:10 -0500

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From: napi@cs.indiana.edu (Mohd Hanafiah Abdullah)
Newsgroups: comp.compilers
Date: 1 Nov 2003 12:03:10 -0500
Organization: Computer Science, Indiana University
References: 03-10-113 03-10-145
Keywords: books, parse
Posted-Date: 01 Nov 2003 12:03:10 EST



VBDis <vbdis@aol.com> wrote:
>vicky7909@rediffmail.com (v796) schreibt:
>IMO top-down parsers are easier to understand than bottom-up
>parsers. Even if both types can be used for C and Pascal, bottom-up
>parsers are commonly described and used for C, and top-down parsers
>for Pascal and other "Wirthian" languages.
>
>If you are free in the design of the language, you may choose a Pascal
>like language, for simpler implementation of the parser and
>compiler. But if your language has to be somewhat compatible with C,
>you have to go the harder way.


I agree that top-down parsers are easier to understand than bottom-up
ones. And this applies to C or Pascal or any other Algol-like
language. Plus, top down parsers are easier to implement by hand if
you choose to although there are parser generators out there. I
personally have manually written top-down parsers using LL(k) grammr
for both C and Pascal and found it ok.


Napi


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