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Re: New C parser [patch]


Stan Shebs <shebs@apple.com> writes:

| Joseph S. Myers wrote:
| 
| >On Mon, 25 Oct 2004, Ziemowit Laski wrote:
| >
| >
| >>I'm just curious as to why you think that writing a C parser from scratch is
| >>easier than tweaking Mark's parser to handle C.
| >>
| >
| > You have an interesting definition of "tweaking".  Geoffrey Keating
| > gave an estimate of 6-9 man-years to merge the front ends making
| > them handle the present languages as fast as at present.  This
| > compares to 1 man-week to write a functional C parser for the exact
| > present language accepted which also speeds up the compiler despite
| > not having been profiled or tuned for performance at all.
| >
| To be fair though, Geoff's estimate accounted for merging a lot
| of the semantic processing that continues to be semi-clones of
| each other, and continues to cause performance problems that have
| to be solved twice.

What are the basis of Geoff's estimates?

-- Gaby


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