<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Oct 21, 2011, at 1:14 PM, reed kotler wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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On 10/21/2011 09:28 AM, Owen Anderson wrote:
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Reed,
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<div>On Oct 20, 2011, at 9:47 AM, Reed Kotler wrote:</div>
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<div>I would like to see the many adhoc parsers in LLVM get
replaced by ones <br>
generated from grammars.<br>
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<div>FYI, this is very unlikely to happen. The parsers in LLVM <i>were</i>
historically generated from grammars (bison, as I recall), and
those implementations were removed in favor of hand-written
implementations both because the latter were significantly
easier to maintain, and because they were much better suited to
offer reasonable diagnostics. Any plan to reverse that
decisions is likely to meet a lot of resistance.</div>
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<div>--Owen</div>
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I'm not planing to use Bison or YACC or Antlr. I stated that in my
email.<br>
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Don't assume that I'm an idiot although it's a possibility. I've
been doing compilers off and on for 35 years now. Ideas in computer
science are like fashion in clothes; if you wait around long enough
then everything comes back into fashion. All the web and flow of how
people do things in compilers has already come and gone many times.<br>
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</blockquote><br></div><div>I don't mean to imply about your skillset, or about the implementation of your grammar (which I know nothing about) or generator. I just thought it was important to make sure you're aware that you may be trying to sell the concept to an audience that has rejected similar things in the past.</div><div><br></div><div>--Owen</div><br></body></html>